Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.4.5 - Species and taxonomy. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.14 - Understand that the genome is the entire DNA of an organism and that a gene is a section of a molecule of DNA that codes for a specific protein. Specification Point 3.15 -Understand that the nucleus of a cell contains chromosomes on which genes are located. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 8.3 - Understand how geopolitical relationships between countries are important in managing trade, migration and tourism. Complete set of Chapter 9 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 5.12 - Understand how restriction enzymes are used to cut DNA at specific sites and ligase enzymes are used to join pieces of DNA together. Specification Point 5.13 - Understand how plasmids and viruses can act as vectors, which take up pieces of DNA, and then insert this recombinant DNA into other cells. Specification Point 5.14 - Understand how large amounts of human insulin can be manufactured from genetically modified bacteria that are grown in a fermenter. Specification Point 5.15 - Understand how genetically modified plants can be used to improve food production. Specification Point 5.16 - Understand that the term transgenic means the transfer of genetic material from one species to a different species. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.55B -Understand how water is absorbed by root hair cells. Specification Point 2.56B -Understand that transpiration is the evaporation of water from the surface of a plant. Specification Point 2.57B -Understand how the rate of transpiration is affected by changes in humidity, wind speed, temperature and light intensity. Specification Point 2.58B - Practical: investigate the role of environmental factors in determining the rate of transpiration from a leafy shoot. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 9.1 - Understand the different ways of defining development, using economic criteria and broader social and political measures. Complete set of Chapter 10 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.3 - Understand case studies of river management in a developed country and a developing or emerging country. Complete set of Chapter 1 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 3 - Calculating Solubility. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.5C - Know what is meant by the term solubility in the units grams per 100 grams of solvent. Specification Point 1.6C - Understand how to plot and interpret solubility curves. Specification Point 1.7C - Practical: investigate the solubility of a solid in water at a specific temperature. Complete set of Chapter 1 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.48C - Know that condensation polymerisation, in which a dicarboxylic acid reacts with a diol, produces a polyester and water. Specification Point 4.49C - Understand how to write the structural and displayed formula of a polyester, showing the repeat unit, given the formulae of the monomers from which it is formed including the reaction of ethanedioic acid and ethanediol. Specification Point 4.50C - Know that some polyesters, known as biopolyesters, are biodegradable. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.17 - Know that some reactions are reversible and this is indicated by the symbol ⇌ in equations. Specification Point 3.18 - Describe reversible reactions such as the dehydration of hydrated copper (II) sulphate and the effect of heat on ammonium chloride. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1.1.1 - Eukaryotes and prokaryotes. Specification Point 4.1.1.2 - Animal and plant cells. Specification Point 4.1.1.5 - Microscopy. Practical 1 - Use a light microscope to investigate a selection of plant and animal cells. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.9 - Practical: Investigate food samples for the presence of glucose, starch, protein and fat. Complete set of Chapter 1 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.46 - Describe the structure of the thorax, including the ribs, intercostal muscles, diaphragm, trachea, bronchi, bronchioles, alveoli and pleural membranes. Specification Point 2.47 - Understand the role of the intercostal muscles and the diaphragm in ventilation. Complete set of Chapter 3 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2.5 - Health issues. Specification Point 4.2.2.6 - The effect of lifestyle on some non-communicable diseases. Specification Point 4.2.2.7 - Cancer. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.1.3 - Electron configuration. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.11 - Know that a fuel is a substance that, when burned, releases heat energy. Specification Point 4.12 - Know the possible products of complete and incomplete combustion of hydrocarbons with oxygen in the air. Specification Point 4.13 - Understand why carbon monoxide is poisonous, in terms of its effect on the capacity of blood to transport oxygen. Specification Point 4.14 - Know that, in car engines, the temperature reached is high enough to allow nitrogen and oxygen from air to react, forming oxides of nitrogen. Specification Point 4.14 - Know that, in car engines, the temperature reached is high enough to allow nitrogen and oxygen from air to react, forming oxides of nitrogen. Specification Point 4.15 - Explain how the combustion of some impurities in hydrocarbon fuels results in the formation of sulphur dioxide. Specification Point 4.16 - Understand how sulphur dioxide and oxides of nitrogen contribute to acid rain. Specification Point 4.17 - Describe how long-chain alkanes are converted to alkenes and shorter-chain alkanes by catalytic cracking. Specification Point 4.18 - Explain why cracking is necessary, in terms of the balance between supply and demand for different fractions. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Points 2.34 and 2.35 - Understand how the process of respiration produces ATP in living organisms. Know that ATP provides energy for cells. Specification Points 2.36 and 2.37 - Describe the differences between aerobic and anaerobic respiration. Know the word equation and the balanced chemical symbol equation for aerobic respiration in living organisms. Specification Point 2.38 - Know the word equation for anaerobic respiration in plants and in animals. Specification Point 2.39 - Practical: investigate the evolution of carbon dioxide and heat from respiring seeds or other suitable living organisms. Complete set of Chapter 2 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Physics Lecture 30 - Fission and Fusion. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 7.17 - Know that nuclear reactions, including fission, fusion and radioactive decay, can be a source of energy. Specification Point 7.18 - Understand how a nucleus of U-235 can be split by collision with a neutron, and that this process releases energy as kinetic energy of the fission products. Specification Point 7.19 -Know that the fission of U-235 produces two radioactive daughter nuclei and a small number of neutrons. Specification Point 7.20 - Describe how a chain reaction can be set up if the neutrons produced by one fission strike other U-235 nuclei. Specification Point 7.21 - Describe the role played by the control rods and moderator in the fission process. Specification Point 7.22 - Understand the role of shielding around a nuclear reactor. Specification Point 7.23 - Explain the difference between nuclear fusion and nuclear fission. Specification Point 7.24 - Describe nuclear fusion as the creation of larger nuclei resulting in a loss of mass from smaller nuclei, accompanied by a release of energy. Specification Point 7.25 - Know that fusion is the energy source for stars. Specification Point 7.26 - Explain why nuclear fusion does not happen at low temperatures and pressures, due to electrostatic repulsion of protons. Complete set of Chapter 7 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.1 - Monomers and polymers. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 1.1 - Understand how living organisms share certain characteristics. Complete set of Chapter 1 Lessons are available.