Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 20 - The Uses of Metals. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. 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 Worksheets are available.

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.

Complete set of companion PDF worksheets for Edexcel IGCSE Chemistry (4CH1) Chapter 4 - Metals, Halogens and Atmospheric Gases. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Five worksheets included: 16 - Group 1 Elements 17 - Group 7 Elements 18 - Atmospheric Gases 19 - Metals and the Reactivity Series 20 - The Uses of Metals

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.34 - Know the general rules for predicting the solubility of ionic compounds in water. Specification Point 2.35 - Understand acids and bases in terms of proton transfer. Specification Point 2.36 - Understand that an acid is a proton donor and a base is a proton acceptor. Specification Point 2.37 - Describe the reactions of hydrochloric acid, sulfuric acid and nitric acid with metals, bases and metal carbonates to form salts. Specification Point 2.38 - Know that metal oxides, metal hydroxides and ammonia can act as bases, and that alkalis are bases that are soluble in water. Specification Point 2.39 - Describe an experiment to prepare a pure, dry sample of a soluble salt, starting from an insoluble reactant. Specification Point 2.42 - Practical: prepare a sample of pure, dry hydrated copper (II) sulphate crystals starting from copper (II) oxide. Complete set of Chapter 5 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.6 - Eating behaviour. Biological explanations for anorexia nervosa, including genetic and neural explanations. Psychological explanations for anorexia nervosa: family systems theory, including enmeshment, autonomy and control; social learning theory, including modelling, reinforcement and media; cognitive theory, including distortions and irrational beliefs. Complete set of Chapter 13 Lectures are available.

Complete set of concise, modern presentations for AQA A Level Psychology (7181 and 7182) Chapter 10 - Gender. Contains colour coded specification points. Five presentations included: 53 - Sex and Gender 54 - Biology and Gender 55 - Cognitive Explanations of Gender 56 - Pyschodynamic Explanations of Gender 57 - Social Explanations of Gender

Complete set of concise, modern presentations for AQA A Level Psychology (7181 and 7182) Chapter 11 - Cognition and Development. Contains colour coded specification points. Five presentations included: 58 - Piaget’s Theory of Cognitive Development 59 - Vygotsky’s Theory of Cognitive Development 60 - Early Infant Abilities 61 - Development of Social Cognition 62 - The Mirror Neuron System

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.7 - Stress. Sources of stress: life changes and daily hassles. Measuring stress: self-report scales (social readjustment ratings scale and hassles and uplifts scale). Complete set of Chapter 14 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.4 - Cognition and development. Vygotsky’s theory of cognitive development, including the zone of proximal development and scaffolding. Complete set of Chapter 11 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.3.2.4 - Chlorination of alkanes. Specification Point 3.3.3.3 - Ozone depletion. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.3.2.1 - Fractional distillation of crude oil. Specification Point 3.3.2.2 - Modification of alkanes by cracking. Specification Point 3.3.2.3 - Combustion of alkanes. Complete set of Chapter 5 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 3 - Organisation and Cell Structure. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Covers the following in a modern, concise format: Specification Point 2.1 - Describe the level of organisation in organisms: organelles, cells, tissues, organs and organ systems. Specification Point 2.2/2.3 - Describe the structures and functions of the cell’s organelles, including the nucleus, cytoplasm, cell membrane, cell wall, mitochondria, chloroplast, ribosome and vacuole. Specification Point 2.4 - Know the similarities and differences in the structure of plant and animal cells. Complete set of Chapter 1 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 8 - Enzymes and pH. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.14B - Practical: Investigate how enzyme activity can be affected by changes in pH. Complete set of Chapter 1 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.21 - Describe the structure of the leaf and explain how it is adapted for photosynthesis. Specification Point 2.22 - Understand that plants require mineral ions for growth, and that magnesium ions are needed for chlorophyll and nitrate ions are needed for amino acids. Complete set of Chapter 1 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 9 - Movement Across Membranes. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.15 - Understand the processes of diffusion, osmosis and active transport by which substances move into and out of cells. Specification Point 2.16 - Understand how factors affect the rate of movement of substances into and out of cells, including the effects of surface area to volume ratio, distance, temperature and concentration gradient. Specification Point 2.17 - Practical: Investigate diffusion and osmosis using living and non-living systems. Complete set of Chapter 1 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.23 - Practical: Investigate photosynthesis, showing the evolution of oxygen from a water plant, the production of starch and the requirements of light, carbon dioxide and chlorophyll. Complete set of Chapter 2 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 14 - The Digestive System. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.27 - Describe the structure and function of the human alimentary canal, including: the mouth esophagus, stomach, small intestine, large intestine and pancreas. Specification Point 2.28 - Understand how food is moved through the gut by peristalsis. Complete set of Chapter 2 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.29 - Understand the role of digestive enzymes, including the digestion of starch to glucose by amylase and maltase, the digestion of proteins to amino acids by proteases and the digestion of lipids to fatty acids and glycerol by lipases. Specification Points 2.30 and 2.31 - Understand that bile is produced by the liver and stored in the gallbladder. Understand the role of bile in neutralising stomach acid and emulsifying lipids. Specification Point 2.32 - Understand how the small intestine is adapted for absorption, including the structure of a villus. Complete set of Chapter 2 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 56 - Deforestation. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.18B - Understand the effects of deforestation, including leaching, soil erosion, disturbance of evapotranspiration and the carbon cycle, and the balance of atmospheric gases. Complete set of Chapter 6 Worksheets are available.