Powerpoint lecture and associated PDF worksheet 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 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.3 - Attachment. Caregiver-infant interactions in humans: reciprocity and interactional synchrony. Stages of attachment identified by Schaffer. Multiple attachments and the role of the father. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.3 - Attachment. Romanian orphan studies and the effects of institutionalisation. Complete set of Chapter 3 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 17 - Group 7 Elements. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.5 - Know the colours, physical states (at room temperature) and trends in physical properties of chlorine, bromine and iodine. Specification Point 2.6 - Use knowledge of trends in group 7 to predict the properties of other halogens. Specification Point 2.7 - Understand how displacement reactions involving halogens and halides provide evidence for the trend in reactivity in group 7. Specification Point 2.8C - Explain the trend in reactivity in group 7 in terms of electronic configurations. Complete set of Chapter 4 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: 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 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 1.1 - Understand the three states of matter in terms of the arrangement, movement & energy of the particles. Specification Point 1.2 - Understand the interconversions between the three states of matter in terms of: The names of the interconversions. How they are achieved. The changes in arrangement, movement & energy of the particles. Complete set of Chapter 1 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 1.11 - Understand how a chromatogram provides information about the composition of a mixture. Specification Point 1.12 - Understand how to use the calculation of Rf values to identify the components of a mixture. Specification Point 1.13 - Practical: understand how a chromatogram provides information about the composition of a mixture. Complete set of Chapter 1 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.3 - Attachment. Animal studies of attachment: Lorenz and Harlow. Complete set of Chapter 3 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 41 - DNA, Genes and Chromosomes. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. 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 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 13 - Human Nutrition. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.24 - Understand that a balanced diet should include appropriate proportions of carbohydrate, protein, lipid, vitamins, minerals, water and dietary fibre. Specification Point 2.25 - Identify the sources and describe the functions of carbohydrate, protein, lipid (fats and oils), vitamins A, C and D, the mineral ions calcium and iron, water and dietary fibre as components of the diet. Specification Point 2.26 - Understand how energy requirements vary with activity levels, age and pregnancy. Complete set of Chapter 2 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 8.1 - Understand the rise of the global economy and the factors encouraging it. Specification Point 8.1 - Understand the role of global institutions, including the World Trade Organization (WTO), the International Monetary Fund (IMF) and TNCs in creating a more globalised economy. Complete set of Chapter 9 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 7.1 - Understand the distributions and characteristics of the world’s fragile environments. Complete set of Chapter 8 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 5.1 - Understand the distributions and characteristics of the world’s biomes (tropical, temperate and boreal forests, tropical and temperate grasslands, deserts and tundra). Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 6.1 - Understand factors affecting the rate of urbanisation and the emergence of megacities. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1 - Understand the causes of tropical cyclone hazards, including ocean temperature, atmospheric pressure, wind shear and Coriolis force. Specification Point 3.1 - Understand the causes of volcanic and earthquake hazards, including the role of plate boundaries and hotspots. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 5.3 - Understand the diversification of farming to generate new income streams: GM crops, specialist crops and food, organic farming, recreation and leisure. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.7.2.3 - Decomposition. Practical 10 - Investigate the effect of temperature on the rate of decay of fresh milk by measuring the change in pH. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.2 - Understand how river landscapes change over the course of a river, with distinctive upland and lowland landforms, including the formation of valleys, interlocking spurs, waterfalls, meanders, oxbow lakes, floodplains and levees. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.1 - Understand the physical processes at work on the coast: marine processes, weathering and mass movement. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1 - Understand the classification of employment by economic sector (primary, secondary, tertiary and quaternary) and the reasons for the differences in the employment structures in countries at different levels of development. Complete set of Chapter 5 Lectures are available.