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This video introduces atoms and several related topics in seven parts.
'What is an atom?' explains the structure of an atom and introduces protons, neutrons, electrons, quarks and leptons.
'Elements' defines an element and explains atomic numbers and the periodic table.
'Isotopes' defines at isotopes, atomic number and atomic weight and looks at radiation, radioactive decay, and the use of radioisotopes.
'Molecules' describes how molecules are formed fro atoms, explains electron sharing, chemical bonding, water molecule formation (and its electrical neutrality) and introduces chemical symbols and formulae.
'How Scientists study Atoms' looks at the scanning tunnelling electron microscope.
'Radioactivity' defines radioactive elements and isotopes, introduces alpha, beta and gamma particles and explains the Geiger counter.
'Energy from the Atom' looks at: the principles of atomic fission; the workings of a nuclear reactor and its environmental impact; and the problems of nuclear waste disposal and thermal pollution; and introduces atomic fission.
52 minutes. PAL VHS tape
Cost: £39.00 + VAT
The following cycles are introduced in this video: oxygen/carbon dioxide, nitrogen and water, along with how they may be disrupted by toxic chemicals.
The video looks at: environmentally harmful and useful chemicals; chemical composition of air; oxygen carbon dioxide cycle covering briefly photosynthesis, respiration, combustion and corrosion of metals; the nitrogen cycle with nitrogen fixation, nitrifying and denitrifying bacteria, and chemical fertilizers; accumulation of toxic chemicals in plants and animals e.g. strontium 90, DDT, and PCBs; and the water cycle.
19 minutes. PAL VHS tape
Cost: £29 + VAT
This video uses everyday examples to explain how the density of solids varies widely. It shows how density is measured and demonstrates that it is a property of matter not a function of size. Atomic structure is briefly examined, volume and density calculated and difference between mass and weight explained. It also describes how density can be affected by heating, compression and chemical reaction.
35 minutes. PAL VHS tape
Cost: £35.00 + VAT
This video comes in three parts: the first provides a general introduction to the elements and the periodic table; the second and third are games that challenge the pupils to identify elements by appearance and spoken clues.
Part 1: Introduction to the Elements
This part of the video includes: the modern concept of elements and atomic theory from a historical perspective; elements, atoms, electrons, nuclei, protons, neutrons and the electron cloud model; atomic mass, number and isotopes; the periodic table, its layout and usefulness; characteristics and uses of metals, non-metals, halogens and noble gases; and how atoms combine to form molecules and compounds.
Part 2: Game One - The Apprentice
This game challenges pupils to identify some of the best known elements from their appearance on screen and spoken information.
Part 3: Game Two - The Wizard
In this game a few less common elements, including transition ones, are introduced; more difficult clues are given with the need to consult the data sheets provided with the package.
56 minutes. PAL VHS tape
Cost: £49 +VAT
This video introduces earthquakes and their causes and effects. It explains: the nature of the earth's interior and exterior layers; the concepts of continental drift and tectonic plates; the cause of plate movement; the three types of plate boundaries; the location and the importance of the mid-ocean ridge, subduction zone and transform faults; the causes and most likely locations of earthquakes; seismic waves and how earthquakes are measured using the Richter scale.
20 minutes. PAL VHS tape
Cost: £29.00 + VAT
This video explains the forces that result in the faulting and folding of the Earth's crust. It demonstrates how tectonic forces can trigger damaging earthquakes, while in other ares they slowly and inconspicuously deform rocks along way below ground. The video explains how solid rocks within the Earth's crust, driven by the movement of continent-sized crustal plates, are compressed and sheared into faults and folds. Examples of specific faults and folds illustrate their usefulness as traps for petroleum or natural gas, or as conduits for the formation of valuable minerals.
17 minutes. PAL VHS tape
Cost: £29.00 + VAT
This video explains the origins, uses and environmental impact of coal, oil and natural gas.The first part is concerned with the geological processes that form the carbon cycle. The various problems caused by the consumption of fossil fuels are examined in the second part of the video. Topics covered are, fossil fuel exhaustion, acid rain, air pollution, and greenhouse warming. The final part looks at fossil fuel conservation and renewable energy sources.
19 minutes. PAL VHS tape
Cost: £29.00 + VAT
Aimed at students aged 15-plus, this hour-long video focuses on the issues and applications of chemistry in modern life. It consists of 13 segments that each deal with a different chemical topic:
A science called chemistry - the role of chemistry in modern life is explored;
Imaging the atom - the scanning tunnelling microscope is used to display images of atoms;
Messy chemistry - scientists use the concept of reaction rates to prevent it food spoilage;
Imitating nature - ultraviolet spectroscopy is demonstrated in the testing of suntan lotions;
Surface action - the concept of surface tension is explored using detergent;
Fingerprinting drugs - infra-red spectroscopy is used to investigate molecular structure;
The periodic table - industrial designers use the periodic table to develop a stronger glass;
Aluminium - the recycling and recovery processes for aluminium is explored;
Chemistry in your stomach - acid/base reactions are explained using commercial antacids;
Catalysts of life - the action of catalysts in industrial processes is compared with that of enzymes in living organisms;
A molecular disease - the molecular origins of sickle cell anaemia are explored;
Debating toxic waste - the problem of toxic waste is discussed by citizens and scientists;
The ozone layer - and NASA scientist discovers the protective function of the ozone layer and the threats to it.
The 13 segments outlined above (each between three and seven minutes long) are intended to provide a starting point for further exploration of the topic in question. The video is accompanied by a teacher's guide that provides information and ideas about using the video and suggested further activities.
60 minutes. PAL VHS tape
Cost £49.00 plus Vat
This video provides a basic introduction to geology. It explains: current thinking as to how the earth was formed; earth's structure looking at the crust, mantle, and outer and inner cores; weathering and the agents that cause it; erosion and its causes; continental drift and plate tectonics; and finally, volcanoes and earthquakes and their cause.
22 minutes. PAL VHS tape
Cost: £29.00 + VAT
This video shows how the atoms in molecules combine and separate in different ways to constitute chemical change. Using domestic and industrial processes as illustrations, it explains how chemical change sometimes requires an input of energy (endothermic). The video also explains that the atoms in some molecules are more tightly bonded to each other consequently needing more energy to break those bonds. Chemical changes that have an output of energy (exothermic) are emphasised because of their importance in life processes and our industrial society. The importance of oxidation is explained using examples such as explosives and rust formation.
16 minutes. PAL VHS tape
Cost: £29.00 + VAT
The theory of plate tectonics is introduced in this video showing where crustal plates are found and why there interaction results in earthquakes and volcanoes. It explains how Alfred Wegener's views on continental drift led to the rejection of crustal permanence and the acceptance of crustal movement and change. Animation shows how the earth's crust, or lithosphere, is divided into large tectonic plates that move slowly past each other and ins so doing their borders become the focal points of recurrent seismic activity.
18 minutes. PAL VHS tape
Cost: £29.00 + VAT
This video looks at the problems of human sewage waste (both domestic and industrial) and the chemical and biological methods involved in proper treatment.
Two case studies are reviewed, the first is a marine based system where sewage was disposed directly into the sea with minimum treatment. This case introduces the student to pathogens, biological oxygen demands (BOD) and aerobic bacterial treatment. The second study involves a land based system and looks at the biological removal of nitrogen and phosphorous nutrients. Concepts looked at include eutrophication, luxury uptake and the catalytic function of bacteria.
The final part looks at health, safety operating issues relating sewage plants.
32 minutes. PAL VHS tape
Cost: £39.00 + VAT
This video explains the three states of matter using everyday examples and simple experiments.
It examines the characteristics of solids, liquids and gases. Animation si used to show the effects of volume on pressure, and explain Boyle's and Charles' Laws. The video demonstrates how matter can be changed from one phase to another, and explains the differences between chemical and physical processes.Examples shown include condensation, melting, boiling, freezing, and sublimation (with dry ice/solid carbon dioxide).
20 minutes. PAL VHS tape
Cost: £29.00 + VAT
This video examines the causes and effects of greenhouse warming. It explains how the greenhouse effect is a natural atmospheric process that has kept the earth warm for billions of years. It then describes how the burning of fossil fuels have been adding carbon dioxide to our atmosphere at a rapid rate. Computer models are shown that predict global warming of 3oC to 5oC within the next 50 years. The effects of this on sea-levels, agricultural land and changing rainfall patterns are all demonstrated. The video ends by looking at possible ways of decreasing the build-up of greenhouse gases, such as energy conservation, and alternative energy sources.
17 minutes. PAL VHS tape
Cost: £29.00 + VAT
This video introduces the processes that crate, change and break down the earths materials, and defines the three major rock types - igneous, sedimentary and metamorphic. The rock cycle processes are explored step by step: the crystallization of magmas and lavas into igneous rocks; the erosion and deposition of loose sediment into cemented sedimentary rocks; and finally the recrystallization of all rock types into metamorphic rocks. The video explains how the rock cycle operates over billions of years, involving large scale recycling of the earths crust.
18 minutes. PAL VHS tape
Cost: £29.00 + VAT
This CD-ROM outlines the structure and composition of the earth in terms of rocks and minerals, and geological processes. It is divided into four parts.
Part 1: The Earth - Important Facts - this part looks at the position of the earth in the solar system, its structure and dimensions, and provides an introduction to geology.
Part 2: Composition of the Earth - defines and explains elements and minerals, and looks at the processes by which igneous, sedimentary and metamorphic rocks are formed and reformed.
Part 3: Geological Processes - explains: plate tectonics; uplifting, folding and faulting; earthquakes and volcanoes; and weathering and erosion.
Part 4: History of the Earth - explores theories about the origins of the earth; outlines the geological time scale; and looks at formation of fossil fuel and the age of the dinosaurs.
Hardware requirements
PC: 386/33MHz minimum, 8Mb RAM, 2X CD- ROM drive, Win3.1 or Win95, VGA 640x480 16 Colours (256 recommended), sound card.
Mac: 68030 or better, 8Mb RAM, 2X CD-ROM drive, 256 colours recommended, System 7.0 or later.
Cost: £45.00 + VAT
Producer: Video Education Australasia.
This video use 3-D computer graphics and animation to explain the chemical and electrolytic processes involved in producing aluminium metal. (Knowledge of ionic bonds and lattice network structures is assumed). The programme is divided into six parts.
(i) introduction: this explains the varied uses of aluminium and its alloys, and also looks at the various aluminium bearing ores
(ii) from bauxite to alumina: shows the various stages of refining bauxite into alumina
(iii) from alumina to aluminium: explains the processes, raw materials and energy needed to produce aluminium ingot
(iv) electrolysis: explains operation of aluminium smelting pots, outlines the Hall- Heroult smelting process and looks at the energy equations of power used in smelting as well as the chemical reactions taking place under electrolysis.
(v) from electrolysis to ingot: shows vacuum crucibles loading molten aluminium from pots and delivery to ingot mill. Looks at purity analysis, economics of production, and health and safety issues.
(vi) aluminium and the environment: this section looks at the discharges from a smelting operation, and the environmental monitoring procedures and licensing. Discusses dangers of fluoride emissions and ways of reducing fluoride consumption and wastage.
30 minutes.
Cost: £39.00 + VAT
This video is accompanied by a teacher's guide, which provides suggested pre- and post- viewing activities, and more technical information
This video is in two parts the first looks at the states of matter and the second the concept of the Mole
Part 1: States of Matter
This part looks at the following topics: the kinetic theory of gases with explanation at the molecular level; freedom of motion of particles is explained; energy and changes of state; how gas pressure is affected by changes in amount, volume and temperature; transportation of natural gas and commercial uses of liquid nitrogen in refrigeration and cryogenics; and a demonstration of the changes of state of bromine from a gas to a solid.
Part 2: The Mole
This considers the following; Avogadro's Hypothesis that equal volumes of gases at the same temperature and pressure contain an equal number of particles; atomic masses of different elements are relative masses; the use of the Mole and Avogadro's number; the periodic table and relative molar masses; the Mole concept and chemical reactions; and the importance of the Mole concept in the production of an epoxy resin.
The video is accompanied by a comprehensive teacher's guide.
30 minutes. PAL VHS tape
Cost: £35.00 + VAT
This video is divided into three parts: the structure of the atom; the arrangement and significance of the periodic table; and the nature of chemical bonds and the differences between covalent and ionic bonds.
Part One: The atom
This part includes: development of atomic models used to explain and predict behaviour of matter; interactions of electrically charged objects; description of Rutherford's gold foil experiment used to show that atoms contain a nucleus and Crooke's tube experiment; a look at the modern model of the atomic structure explaining the relative positions, masses and charges of protons, neutrons and electrons, and how electrons are represented as electron clouds; emission spectroscopy and elemental identification; and the scanning tunnelling microscope which is used to reveal contour images of the electron clouds of atoms.
Part Two: The Periodic Table
Topics considered in this section include: description of the periodic table with identification of groups and periods; group properties and their variance; size of atoms and their variance within the periodic table; periodicity of the alkali metals with their reaction with water; a look at glass making as an example of how the periodic table can be useful in industrial applications; Mendeleev's early periodic table and Glenn Seaborg's revision of the table into its present day form; and how the periodic table can be used to predict electron configuration (valency) of an element.
Part 3: Chemical Bonds
This part of the video explains the basic rules of bond formation; the formation of ionic and covalent bonds; demonstrates ionic bonding using sodium chloride as an example; covalent bonding using formation of the dihydrogen as example; looks at what happens when water changes state and considers the effect this has on water's covalent bonds and the weak intermolecular forces between water molecules; and looks at the large amount of energy involved in the breaking and making of covalent nitrogen bonds using ammonia production, nitrogen fixation, lightning and explosives as examples.
This video is accompanied by a comprehensive teacher's guide for each of the three parts.
45 minutes. PAL VHS tape
Cost: £49.00 + VAT
This video is in two parts, the first considers the versatility of carbon's molecular structures and the vast range of properties of its compounds, the second how the properties of polymers are made by controlling their molecular structure.
Part 1: Organic Chemistry
This section considers the following: how carbon forms a large number of molecules, introduces covalent bonding; graphic models of the basic hydrocarbon molecules, methane, ethane, ethene (ethylene), ethyne (acetylene); the bromine test for presence of double bonds; structural isomers e.g. butane and isobutane; chemical properties and their relation to structure and functional groups within the molecule; classification of organic compounds according to functional groups e.g. carboxylic acids, alcohols and esters; organic synthesis of natural compounds; and the commercial production of artificial fragrances, flavourings and Aspirin.
Part 2: The Age of Polymers
The final section studies the following: the variety of uses of polymers and how they are produced from crude oil and natural gas; how the chemical and physical properties of polymers are related to their molecular structure; demonstration of the synthesis of Nylon; fractional distillation of crude oil, and catalytic cracking; formation of polymers from ethene (ethylene) showing free radical chain reactions; compares high density and low density polyethylene (polyethene); polymerisation of styrene monomer to form polystyrene; and the recycling problems associated with synthetic polymers.
The video is accompanied by a comprehensive teacher's guide.
30 minutes. PAL VHS tape
Cost: £35.00 + VAT
This two part video looks at the evolution of the atmosphere and its global cycles, the second looks at how minerals and ores were formed.
Part 1: The Atmosphere
This part considers the following topics: the earth's probable original atmosphere and how it evolved to its present composition; present composition of the atmosphere in percentage terms; methods used to detect past and present changes in the atmosphere as well as future projections; outline of the water and carbon cycles; greenhouse effect and holes in the ozone layer; and finally commercial use of CFCs (chlorofluorocarbons) and ozone depletion.
Part 2: The Chemistry of the Earth
The second part considers: distribution of minerals and ores, and how location is a result of how the earth was formed; formation of ore deposits by crystallization of magma, precipitation from superheated steam, and sedimentation; structure of silicates and properties of various silicon containing materials; and how acid rain reacts with limestone and marble.
The video is accompanied by a comprehensive teacher's guide.
30 minutes. PAL VHS tape
Cost: £35.00 + VAT
This video is in three parts and looks at: acids and bases, proton transfer, the pH scale and acid rain; oxidation and reduction, the working of electrochemical cells and the process of electrolysis; the properties of metals, the nature of their metallic bonds and extraction of metals from their ores.
Part 1: Acids and Bases
This part of the video: provides a summary of properties of acids and bases; explains proton transfer with demonstrations and graphics; shows how antacids combat stomach acidity; demonstrates the role of water in proton transfer; demonstrates how an acid's strength is dependent on the transfer of protons to water to form hydronium ions; explains pH (hydronium ion concentration) and the pH scale; and shows how human activity has decreased the pH of rain in many regions (acid rain).
Part 2: Oxidation and Reduction
This section of the video: explains how oxidation and reduction reactions involve the transfer of electrons, and shows how this process can cause corrosion and make batteries; explains how chemical reactions can produce energy with demonstration of a copper/zinc electrochemical cell; explains why and how lithium is used to make batteries; explains the workings of the lead storage batteries; show how electrical energy is used to produce chemical reactions e.g. electrolysis of water; and shows how industry uses electrolysis to extract aluminium from bauxite.
Part 3: Metals
This final part of the video: describes the characteristics and uses of metals; explains the properties of metals in terms of the metallic bonds; explains the metallic bond as an arrangement of metal ions in a sea of delocalised electrons; demonstrates metal extraction from ore using oxidation/reduction reactions; shows how aluminium is extracted from bauxite by electrolytic reduction; shows how useful alloys can be made by combining different metals, and explains the production and properties of steel and stainless steel; and looks at the recent development and possible uses of metal superconductors.
The video is accompanied by a comprehensive teacher's guide.
45 minutes. PAL VHS tape
Cost: £49.00 + VAT
The video, in three parts looks at: the forces that drive chemical reactions, exothermic and endothermic reactions, and entropy; different reaction rates, how reaction rates are altered, and collision theory; the use and economic value of catalysts, how catalysts work, and how enzymes act as catalysts.
Part 1: The Driving Forces
This part of the video: explains that chemical reactions have a natural or spontaneous direction in which they occur; shows that the tendency to reach a lower energy state drives many reactions; demonstrates exothermic reactions using potassium and glycerine; demonstrates endothermic reactions using barium hydroxide and ammonium thiocyanate; shows that the tendency to increased disorder - entropy - also drives many reactions; and shows how industry makes use of the natural direction of the flow of energy in the design of its plants.
Part 2: Chemical Kinetics
The middle part of the video: shows that different reactions take place at different rates; demonstrates the effect of different temperatures and concentrations on reaction rates; demonstrates how catalysts speed up reactions and yet remain unchanged; explains how molecular motion helps understand reaction rates; introduces collision theory and the concept of activation energy using the formation of hydrogen bromide from hydrogen and bromine as an illustration; and finally how the concepts of reaction kinetics are used in food technology.
Part 3: Catalysts
The final part of the video: explains the economic value of catalysts; show the use of rhodium as an example of a re-usable catalyst; explains how catalysts speed up reactions by lowering the activation energy of a reaction; demonstrates how molecules react at the surface of a solid catalyst; how molecular models can help understand the action of catalysts; explains how enzymes are also catalysts using the potato enzyme catalysed decomposition of hydrogen peroxide as an example; and finally how enzymes function as catalysts for specific molecules of particular size and shape.
The video is accompanied by a comprehensive teacher's guide.
45 minutes. PAL VHS tape
Cost: £49.00 + VAT
This video introduces volcanoes and their causes and effects. It explains: the nature of the earth's interior and exterior layers; the concepts of continental drift and tectonic plates; the cause of plate movement; the processes that lead to the formation of volcanoes; the formation of 'hot-spot' volcanoes in weak or thin areas of the earth's crust (e.g. Hawaiian Islands); different formations of lava flow; and finally the three types of volcanoes shield, cinder cone and composite.
23 minutes. PAL VHS tape
Cost: £29.00 + VAT
This video uses 3D computer animation to help students understand the three states of water: solid, liquid and gas at the molecular level.
The video is divided into short segments: the molecular model of the water molecule; its chemical formula; molecular structures of water, ice and water vapour; and finally the molecular processes of melting, evaporation and boiling.
A comprehensive 60 page teaching package is included with the video covering the topics: the nature of scientific theories and models; the nature of molecular substances; and the way molecular substances interact with each other. Lesson plans, activities etc. are also included.
12 minutes. 1996 PAL VHS tape
Cost: £29.00 + VAT
This video explains physical and chemical weathering, and erosion by gravity, running water, wind and ice. The section on physical weathering explains the effects of ice, frost wedging, the expansion of bedrock and the effects of plants and animals. The section on chemical weathering shows how reactions occur between rock surfaces and their surroundings due to oxidation and solution weathering, and the effects of chemicals formed by plants. The video explains how soil is an important product of physical and chemical weathering. The section on erosion deals with erosion by gravity, running water, wind and ice.
19 minutes. PAL VHS tape
Cost: £29.00 + VAT
This video explores the unseen world of molecules using the experiences of a group of children, experiments and observations of common phenomena. It explains the size of molecules and their attraction for each other. Their movement is visualised with marbles in an abstract model. The different behaviour of solids liquids and gases is observed. The video ends with demonstrations of how matter changes state when molecules are heated or cooled.
12 minutes. PAL VHS tape
Cost £19.00 + VAT
This new (1998) CD-ROM is aimed at students aged 13 plus (suitable for GCSE teaching). It is designed to help students understand the particulate basis of chemical reactions, their symbolic representation as chemical equations and to apply this understanding when balancing equations and solving simple problems based on equations. The package consists of three discrete modules dealing with molecular and ionic equations, and the interpretation of equations. It is designed for use in lecture, tutorial or self instruction.
The CD-ROM contains three distinct modules:
Module 1: Molecular Equations-examines eight chemical reactions (including hydrogen and chlorine, hydrogen peroxide decomposition, lead (II) iodide precipitation), using video demonstrations, animated simulations, balanced chemical equations and formulae, practice sets of 20 additional reactions.
Module 2: Ionic Equations-uses the above techniques to examine eight ionic reactions (including zinc and hydrogen chloride, copper and silver nitrate solution, iron (III) hydroxide precipitation).
Module 3: Interpreting Equations-provides interactive practice for students in constructing molecular representations, calculating numbers of molecules to balance simple equations, and constructing before and after reaction diagrams including the limiting the reagent concept.
A detailed 16 page instruction booklet is provided.
Hardware requirements
PC: 486/66MHz, 12Mb ram, X2 CD-ROM drive, Windows 95, VGA card with 256 colours, 640 x 480 resolution, sound card.
Mac: 68040, 14" monitor (256 colours); System 7 or later.
Cost: £45.00 + VAT additional copies can be purchased for £22.50
This video is suitable for pupils aged 12 plus. Produced in 1991 it explains diffusion, the spontaneous mixture of two substances, and phase changes in matter.
The video demonstrates diffusion in solids, liquids and gases (with the help of computer animation of the particle model, time lapse photography and laboratory experiments) and explains the two factors that affect the rate of diffusion - heat and the distance between molecules. It then deals with phase changes in various substances, showing how heat can cause melting, vaporisation and sublimation, while removal of heat can lead to solidification, condensation and resublimation. A summary at the end of the video of shows bromine undergoing each phase change.
12.5 minutes. PAL VHS tape 1991
Cost: have a £29 plus VAT
Aimed at pupils aged 11 and over this video provides an introduction to: atoms, elements and compounds, and bonding between atoms in compounds; the differences between elements, compounds and mixtures; and the nature of chemical reactions.
Part 1: Good Vibrations
This section introduces the notions of atom, element and molecule atomic symbols and formulae; uses the example of a guitar string to introduce the particle theory of matter and explain the properties of solids, liquids and gases, and changes of state; explores the bonding between atoms in compounds; explains melting points and boiling points (and why they vary from substance to substance); and introduces the concept of absolute zero.
Part 2: Elements, Compounds and Mixtures
This section explores the distinction between elements, compounds and mixtures; uses a case study approach (a dog mysteriously poisoned by lead in the garden soil) to show how an element can exist in various forms which can affect its properties; explains why a substance may dissolve in one liquid but not another; introduces the notion of a single atom molecules and multiple atom molecules; shows the action of solder and asks whether it is an element, compound or mixture.
Part 3: Chemical Reactions
This final section contrasts the physical changes explored in part 1 above with chemical changes which cause a change in more than just the state of the element or compound; shows and explains examples of chemical reactions in space shuttle fuel, car air bags and explosives; introduces chemical equations and their balancing; shows how chemical reactions are often indicated by release of gas, or changes in temperature and or colour; explains the series of chemical reactions that occur when lighting a match; and finally explains the irreversibility of chemical reactions.
57 minutes. 1997 PAL VHS tape
Cost: £49 plus VAT
This video, suitable for GCSE students, introduces the oxygen/carbon dioxide cycle, the nitrogen cycle and the water cycle, and explains how they made be disrupted by toxic chemicals.
The video looks at: harmful and useful chemicals and the environment; the chemical composition of air; the oxygen/carbon dioxide cycle (briefly explains photosynthesis, respiration, combustion and corrosion of metals); the nitrogen cycle (briefly explains nitrogen fixation, nitrifying and denitrifying bacteria, the use of chemical fertilisers to artificially fix nitrogen; the accumulation of dangerous chemicals in plants and animals (eg strontium 90, DDT and PCBs; and the water cycle.
90 minutes. PAL VHS tape
Cost: £29 plus VAT
Suitable for GCSE biology students, this video introduces the chemical concepts important to understanding life processes. It deals with: elements, atoms, protons, neutrons, electrons, molecules, isotopes and ions; ionic and covalent bonds; the importance of water and carbon; the pH scale; the structures and functions of carbohydrates, lipids, proteins and nucleic acids, DNA and RNA; mono-, di-and polysaccharides, and hydrolysis; proteins, amino acids, peptide bonds and polypeptides. The video is accompanied by a comprehensive teacher's guide
21 minutes
Cost: £29.00 + VAT
This video demonstrates what a titrations is, how it is performed and how to determine when it is complete. It shows how the technique is applied in a number of real settings.
The video explains and demonstrates:
that a titration can determine how much of an analyte is in solution;
terms such as standard solution, titrant, and subsequent analyltical calculations;
that acid-base titrations permit the concentrations of acids and bases to be determined accurately using a neutralisation reaction;
that the end point of a titration is signalled by adding an appropriate indicator to the analyte solution;
commercial analysis to determine the concentration of sulfides in canned tuna fish;
a redox titration to determine the amount of vitamin C in different samples using an iodine/thyodyne indicator to determine the end point after which the analytical calculation is shown.
23 minutes 2002 PAL VHS tape
Cost: £29.00 + VAT
This video demonstrates the water monitoring techniques that are involved in testing and studying water quality.
Video explains and demonstrates:
how the analysis has to be sensitive enough to measure substances down to parts per million (ppm.)
how an investigation is conducted to test and compare water samples from various sources;
sampling methods as applied to temperature, pH, dissolved oxygen, hardness, alkalinity, nitrate, chlorine deterimnations; and coliform bacteria levels;
how the final analysis of the results is carried out to determine the suitability of the water for drinking purposes;
and proper laboratory safety procedures.
27 minutes 2002 PAL VHS tape
Cost: £29.00 + VAT
This video introduces the process of photosynthesis.
using computer animation, on screen diagrams and equations to enhance students understanding, the video:
explains how all living things depend ultimately on photosynthesis;
demonstrates the importance of the products of photosynthesis, especially glucose;
outlines step-by-step the basic details of photosynthesis as well as respiration;
introduces the chemical equations for photosynthesis and respiration;
demonstrates the site of photosynthesis;
explains the role of chlorophyll.
14 minutes 2002 PAL VHS tape
Cost: £29.00 + VAT
This video explains the nitrogen cycle and how it may be disrupted by man.
It outlines the importance of nitrogen to all living things, and deals with topics such as free versus fixed nitrogen, how nitrogen is fixed, legumes and soil bacteria. It explains terms such as decay, denitrification and nitrogen pollution. It looks at problems caused when excess nitrogen is released into the environment, such as poisoned drinking water, acid rain and eutrophication. A teacher's guide is supplied.
14 minutes PAL VHS tape
Cost: £29.00 + VAT
This video on energy and chemical reactions looks at:
different types of chemical reactions; combination, decomposition and replacement reactions;
conservation of mass, stoichiometry, and the role of limiting reagents;
exothermic and endothermic reactions, the use of enthalpy terms;
the use of colour, temperature, formation of gas or precipitate, to indicate that a chemical reaction has occurred;
how concentration, temperature, and presence of catalysts can determine the rate of reaction;
oxidation and reduction reactions including chemi- and bioluminescence;
proper safety measures essential for performing chemical reactions.
£29.00 plus VAT
This video highlights the safety guidelines that should be followed when conducting practical experiments in the laboratory.
Explained and demonstrated in this video are:
common sense in the lab-good planning
personal protective equipment-lab coats and safety glasses;
handling chemicals-use of labels, safety data sheets, and correct procedures for handling acids and bases;
handling of biological materials,
how to prevent contamination and avoid spreading it around the lab;
safe use of equipment i.e. Bunsen burners glassware and fume cupboards;
emergency procedures-dealing with hazardous materials and reporting of accidents;
cleaning up and disposing of chemicals after reactions.
22 1/2 minutes 2003 PAL VHS tape
Cost: £29 plus VAT
This video introduces organic chemistry, explains the chemical properties of carbon and looks at the enormous variety organic compounds.
The programme is divided into sections dealing with the following topics:
carbon: the element of life-defines organic matter and organic chemistry; looking at the atomic structure of carbon and disability to form covalent bonds;
hydrocarbons-looks at the atomic structure of methane and introduces alkanes, cycloalkanes, alkenes and alkynes, explaining the difference between saturated and unsaturated hydrocarbons, finally looking at the rules for naming hydrocarbons;
functional groups-looks at functional groups and examples such as halocarbons, and briefly ethers, carboxylic acids and esters amines and amides;
polymers and plastics-shows the structure of polymers and monomers and looks at the production of synthetic polymers;
life processes-shows how all life processes involve complex chemical reactions, looking out to photosynthesis
20 minutes 2003 PAL VHS tape
Cost: £29 plus VAT
This programme shows how elements bond together, the different types of chemical reactions, and the principles electrochemistry.
The video is divided into sections dealing with the following topics:
changes in matter-looking at nuclear, physical and chemical changes;
ionic bonds-positive and negative ions, how elements become electropositive/electronegative, and how ionic bonds are formed;
covalent bonds-formation of covalent bonds;
molecular structures-including the writing of molecular formulae, the Octet rule and the significance of molecular shapes;
chemical reactions-the processes, writing, and balancing of chemical reactions and equations;
electrochemistry-looks at oxidation and reduction reactions in a Voltaic cell battery.
20 minutes 2003 PAL VHS tape
Cost: £29 plus VAT
This video looks at the characteristics of a gases (and the variable factors that determine their behaviour) and of liquids and solids.
The video is divided into sections dealing with the following topics:
the characteristics of gases- explains how gases have mass, exert pressure and can mix rapidly, also that pressure is proportional to temperature;
he kinetic molecular (particle) theory- explains the elastic motion of gases and the relationship between temperature and kinetic energy;
measuring gases- defines the four variables: the pressure, volume, temperature, and amount of gas, also outlined Boyle's, Charles's, Avogadro's, and Dalton's laws;
different states of matter explains the kinetic molecular (particle) theory of matter;
liquids-looks at the viscosity and surface tension of liquids, and the unique properties of water;
amorphous solids20 minutes 2003 PAL VHS tape
Cost: £29 plus VAT
This programme introduces the chemistry of acids and bases.
This video is divided into sections dealing with the following topics :
properties of acids and bases-describes some acids and bases, and outlines their characteristics;
the Arrhenius definition of acids and bases-explains neutralisation and outlines Arrhenius's explanation;
the Bronsted-Lowry definition-explains how the acidity or basicity of a substance can be measured by its proton concentration;
strong and weak acids and bases-explains how substances are strong or weak acids or bases;
conjugate acid-base pairs-outlines the chemistry of conjugate acid-base pairs;
the pH scale-illustrates the pH scale and the degree to which substances are acids and bases;
pH in the chemistry of nature-acidity and basicity in everyday life.
Cost: £29 plus VAT
This video explains the structure of atoms and the characteristics of elements, isotopes and ions. It also introduces quantum theory and its significance for the electronic configuration of atoms
The video is divided into sections dealing with the following topics:
The structure of atoms-shows the basic structure of atoms looking at the role of protons, neutrons and electrons;
elements and isotopes-explains how elements differ, looking at atomic number, isotopes, atomic mass and atomic mass unit;
ions-explains positive and negative ions and shows how oxidation numbers are written;
nuclear stability-looks at radioactive decay and the three types radiation-alpha, beta and gamma;
Quantum theory-introduces the concept of energy being released in units or quanta, and introduces the Uncertainty Principle;
electron behaviour-looks at atomic orbitals, and quantum numbers
Cost: £29.00 + VAT
This video explains how the organisation of the periodic table is related to the structure of atoms and their electronic configuration.
The video looks at the following topics:
the development of the periodic table-looks at how Mendeleev first developed the periodic table and explains why modern chemists organise the table by atomic number;
reading the periodic table-looks at an elements position on the periodic table and explains its atomic structure, explains the organisation of the periodic table into periods and groups;
electronic configurations-explains why the electrons in the Valence energy level important, shows how the electronic configurations of the elements are related to the periodic table, and explains the Octet rule them;
writing electronic configurations-describes orbitals shapes and explains the principles of writing electronic configurations;
tour of the table-describes the division of the periodic table into similar electronic configurations (s, d, f and p blocks).
20 minutes 2003 PAL VHS tape
Cost: £29 plus VAT
This programme looks at the following topics:
the organisation of the modern periodic table;
nuclear structure of the atom;
review of Mendeleev's periodic table and an examination of Bohr's model of the atom;
the uses of the periodic table to investigate the chemical properties and reactions of representative elements.
26 minutes 1996 PAL VHS tape
Cost: £35 plus VAT
This video introduces formation and decomposition reactions, and explains the following:
how compounds can be tested to classify them as molecular, ionic, acid or base;
the appliance of the law of conservation of mass to balance a reaction equation;
the rules for naming binary compounds;
the formation of mineral compounds within the earth, how hydrothermal vents concentrate minerals to extracted, and how refining methods use decomposition reactions.
26 minutes 1996 PAL VHS tape
Cost: £35 plus VAT
This programme investigates how water's properties help it dissolve substances and explains:
the formation of ionic and molecular compounds, and the efficiency of water in dissolving these compounds;
the Process of diffusion involving a laboratory experiment demonstrating the rate of diffusion in gelatine;
the efficiency of water as solvent shown at a water treatment plant.
26 minutes 1996 PAL VHS tape
Cost: £35 plus VAT
This video is in three parts: part 1 providing a general introduction to the elements and the periodic table; parts 2 and 3 games that challenge pupils to identify elements by appearance and spoken clues.
Part 1 Introduction To The Elements:
introduces the modern concept of elements and atomic theory from a historical perspective;
explains terms such as elements, atoms, electrons;
explains atomic mass, atomic number and isotopes;
Introduces the periodic table, explains its layout and information about each element;
describes the characteristics and uses of metals, non-metals, halogens and noble gases;
shows how atoms combine to form molecules and compounds.
Part 2: The Apprentice
this section challenges pupils to identify some well-known elements from their appearance and spoken information.
Part 3: The Wizard
same as part 2 but with more unusual elements and more difficult clues.
56 minutes 1996 PAL VHS tape
Cost: £39 plus VAT
This video introduces atoms, elements and compounds.
The video explains how atoms are made up of protons, neutrons and electrons;
that different atoms vary in the number of protons, neutrons and electrons they are composed of;
elements are introduced explaining how one elements differs from another;
compounds are explained using the formation of salt and water as examples;
the three states of matter are introduced in relation to water, and the general characteristics of solids, liquids and gases are explained showing how heat can change matter from one state to another.
14 minutes PAL VHS tape
Cost: £29 plus VAT
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