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 2.15 - 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 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 4 - Cell Differentiation. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Covers the following in a modern, concise format: Specification Point 2.5B - Explain the importance of cell differentiation in the development of specialised cells. Specification Point 2.6B - Understand the advantages and disadvantages of using stem cells in medicine. Complete set of Chapter 1 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.5B - Explain the importance of cell differentiation in the development of specialised cells. Specification Point 2.6B - Understand the advantages and disadvantages of using stem cells in medicine. Complete set of Chapter 1 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 6 - Food Tests. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.9 - Practical: Investigate food samples for the presence of glucose, starch, protein and fat. Complete set of Chapter 1 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.7 - Identify the chemical elements present in carbohydrates, proteins and lipids. Specification Point 2.8 - Describe the structure of carbohydrates, proteins and lipids as large molecules made up from smaller basic units. Complete set of Chapter 1 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 5 - Biological Molecules. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Covers the following in a modern, concise format: Specification Point 2.7 - Identify the chemical elements present in carbohydrates, proteins and lipids. Specification Point 2.8 - Describe the structure of carbohydrates, proteins and lipids as large molecules made up from smaller basic units. Complete set of Chapter 1 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.1 - Principles of organisation. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1.3.1 - Diffusion. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2.4 - Coronary heart disease. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2.1: The human digestive system. Practical 5 - Measuring the effect of pH on the rate of activity of amylase enzyme. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2.1: The human digestive system. Practical 4 - Conduct qualitative chemical tests for starch, reducing sugars, proteins, and lipids. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2.2 - The heart and blood vessels. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2.2 - The heart and blood vessels. Complete set of Chapter 2 Lectures are available.

Complete set of concise, modern presentations for AQA GCSE Biology (8461) Chapter 1 - Cell Biology. Contains colour coded specification points with handmade vector graphics. Five presentations included: 1 - Cells and Microscopes 2 - Differentiation and Specialisation 3 - Cell Division 4 - Transport in Cells 5 - Exchanging Substances

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 4.11B - Describe the stages in the nitrogen cycle, including the roles of nitrogen fixing bacteria, decomposers, nitrifying bacteria and denitrifying bacteria. Complete set of Chapter 6 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 4.6 - Understand the names given to different trophic levels, including producers, primary, secondary and tertiary consumers and decomposers. Specification Point 4.7 - Understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer. Specification Point 4.8 - Understand the transfer of substances and energy along a food chain. Specification Point 4.9 - Understand why only about 10% of energy is transferred from one trophic level to the next. Complete set of Chapter 6 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 4.10 - Describe the stages in the carbon cycle, including respiration, photosynthesis, decomposition and combustion. Complete set of Chapter 6 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 4.12 -Understand the biological consequences of pollution of air by sulfur dioxide and carbon monoxide. Specification Point 4.13 - Understand that water vapour, carbon dioxide, nitrous oxide, methane and CFCs are greenhouse gases. Specification Point 4.14 - Understand how human activities contribute to greenhouse gases. Specification Point 4.15- Understand how an increase in greenhouse gases results in an enhanced greenhouse effect and that this may lead to global warming and its consequences. Specification Point 4.16 - Understand the biological consequences of pollution of water by sewage. Specification Point 4.17 - Understand the biological consequences of eutrophication caused by leached minerals from fertilizer. Complete set of Chapter 6 Lessons are available.

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