Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.5.1 - Photosynthesis. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.5.1 - Photosynthesis. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.4.7 - Investigating diversity. Complete set of Chapter 4 Lectures are available.

Complete set of concise, modern presentations for AQA A Level Biology (7401 and 7402) Chapter 4 - Variation Between Organisms. Contains colour coded specification points. Nine presentations included: 27 - DNA, Genes and Chromosomes 28 - Transcription and Translation 29 - Meiosis and Genetic Variation 30 - Mutations 31 - Genetic Diversity 32 - Natural Selection 33 - Classifying Organisms 34 - Biodiversity 35 - Investigating Variation

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.3.2 - Gas exchange. Complete set of Chapter 3 Lectures are available.

Complete set of concise, modern presentations for AQA A Level Biology (7401 and 7402) Chapter 3 - The Exchange of Substances. Contains colour coded specification points. Nine presentations included: 18 - Size and Surface Area 19 - Gas Exchange 20 - Gas Exchange in Humans 21 - Lung Disease 22 - Digestion and Absorption 23 - Haemoglobin 24 - The Circulatory System 25 - Cardiovascular Disease 26 - Xylem and Phloem

Complete set of concise, modern presentations for AQA A Level Biology (7401 and 7402) Chapter 2 - Cells. Contains colour coded specification points. Nine presentations included: 9 - Eukaryotic Cells 10 - Prokaryotic Cells and Viruses 11 - Analysing Cell Components 12 - Cell Division 13 - Cell Membranes 14 - Transport Across Membranes 15 - The Immune System 16 - Immunity, Vaccines and Monoclonal Antibodies 17 - HIV and Viruses

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.16B - Describe a DNA molecule as two strands coiled to form a double helix, the strands being linked by a series of paired bases: adenine (A) with thymine (T), and cytosine © with guanine (G). Specification Point 3.17B - Understand that an RNA molecule is single stranded and contains uracil (U) instead of thymine (T). Specification Point 3.18B - Describe the stages of protein synthesis including transcription and translation, including the role of mRNA, ribosomes, tRNA, codons and anticodons. Complete set of Chapter 5 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.6.2.3 - Skeletal muscles are stimulated to contract by nerves and act as effectors. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.1 - Understand the factors affecting river regimes: precipitation, including storm hydrographs, temperature, vegetation, land use, water abstraction and dams. Complete set of Chapter 1 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 9 - Formulae and Calculations. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.25 - Understand how to write word equations and balanced chemical equations (including state symbols). Specification Point 1.26 - Calculate relative formula masses (including relative molecular masses) from relative atomic masses. Specification Point 1.27 - Know that the mole is the unit for the amount of a substance. Specification Point 1.28 - Understand how to carry out calculations involving amount of substance, relative atomic mass and relative formula mass. Complete set of Chapter 2 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 15 - Electrolysis. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.55C - Understand why covalent compounds do not conduct electricity. Specification Point 1.56C - Understand why ionic compounds conduct electricity only when molten or in aqueous solution. Specification Point 1.57C - Know that anion and cation are terms used to refer to negative and positive ions respectively. Specification Point 1.58C - Describe experiments to investigate electrolysis, using inert electrodes, of molten compounds and aqueous solutions and to predict the products. Specification Point 1.59C - Write ionic half-equations representing the reactions at the electrodes during electrolysis and understand why these reactions are classified as oxidation or reduction. Specification Point 1.60C - Practical: investigate the electrolysis of aqueous solutions. Complete set of Chapter 3 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 2 - Solutions and Solubility. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.4 - Understand how the results of experiments involving the dilution of coloured solutions and diffusion of gases can be explained. Specification Point 1.5 - Know what is meant by the terms: solvent, solute, solution and saturated solution. Complete set of Chapter 1 Worksheets are available.

Complete set of companion PDF worksheets for Edexcel IGCSE Chemistry (4CH1) Chapter 3 - Bonding. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Four worksheets included: 12 - Ionic Bonding 13 - Covalent Bonding 14 - Metallic Bonding 15 - Electrolysis

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.22C - Know that most metals are extracted from ores found in the Earth’s crust and that unreactive metals are often found as the uncombined element. Specification Point 2.23C - Explain how the method of extraction of a metal is related to its position in the reactivity series, illustrated by carbon extraction for iron and electrolysis for aluminium. Specification Point 2.24C - Be able to comment on a metal extraction process, given appropriate information. Specification Point 2.25C - Explain the uses of aluminium, copper, iron and steel in terms of their properties. Specification Point 2.26C - Know that an alloy is a mixture of a metal and one or more elements, usually other metals or carbon. Specification Point 2.27C - Explain why alloys are harder than pure metals. Complete set of Chapter 4 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.44 - Describe tests for these gases: hydrogen, oxygen, carbon dioxide, ammonia and chlorine. Specification Point 2.45 - Describe how to carry out a flame test. Specification Point 2.46 - Know the colours formed in flame tests for the following cations: lithium, sodium, potassium, calcium and copper. Specification Point 2.47 - Describe tests for these cations: ammonium using sodium hydroxide solution and identifying the gas evolved. Copper, iron (II) and iron (III) using sodium hydroxide solution. Specification Point 2.48 - Describe tests for these anions: chloride, bromide and iodide using acidified silver nitrate solution. Sulphates using acidified barium chloride solution and carbonates using hydrochloric acid and identifying the gas evolved. Specification Point 2.49 - Describe a test for the presence of water using anhydrous copper (II) sulphate. Specification Point 2.50 - Describe a physical test to show whether a sample of water is pure. Complete set of Chapter 5 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 24 - Making Salts. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.40C - Describe an experiment to prepare a pure, dry sample of a soluble salt, starting from an acid and alkali. Specification Point 2.41C - Describe an experiment to prepare a pure, dry sample of an insoluble salt, starting from 2 soluble reactants. Specification Point 2.43C - Practical: prepare a sample of pure, dry lead (II) sulphate. Complete set of Chapter 5 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.51 - Understand why simple, unicellular organisms can rely on diffusion for movement of substances in and out of the cell. Specification Point 2.52 - Understand the need for a transport system in multicellular organisms. Specification Point 2.53 - Describe the role of phloem in transporting sucrose and amino acids between the leaves and other parts of the plant. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.65 - Describe the structure of the heart and how it functions. Specification Point 2.66 - Explain how the heart rate changes during exercise and under the influence of adrenaline. Specification Point 2.67 -Understand how factors may increase the risk of developing coronary heart disease. Complete set of Chapter 3 Lectures are available.