Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.7.4.1 - Trophic levels. Specification point 4.7.4.2 - Pyramids of biomass. Specification Point 4.7.4.3 - Transfer of biomass. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.7.5.4 - Role of biotechnology. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 6.3 - Understand the range of possible strategies aimed at making urban living more sustainable and improving the quality of life for the chosen urban environment. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 8.2 - Understand the positive and negative impacts of the growth of global tourism, including mass tourism, on the environment, economy and people of destination areas. Complete set of Chapter 9 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 9.1 - Understand that different factors contribute to the development and human welfare of a country: economic, social, technological, cultural, as well as food and water security. Specification Point 9.1 - Understand that development is measured in different ways: GDP per capita, the Human Development Index, measures of inequality and indices of political corruption. Complete set of Chapter 10 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 8.3 - Understand the different approaches to the management of long-term migration in a named country. Specification Point 8.3 - Understand the different approaches to make tourism more sustainable from individuals, organisations and governments in a named developed and a named emerging or developing country. Complete set of Chapter 9 Lectures are available.

A PowerPoint Quiz with question for Edexcel IGCSE Biology (4BI0) Chapters 1 - Living Organisms. Perfect for an end of topic revision exercise. Matches well with our presentations and worksheets. The quiz is out of a possible 95 marks.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 9.2 - Understand the global pattern of the uneven development between and within countries and the factors (social, historic and economic) that have led to these spatial variations. Specification Point 9.2 -Understand the impact of uneven development on welfare and quality of life within one named country. Complete set of Chapter 10 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 30 - Dynamic Equilibria. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 3.19C - Know that a reversible reaction can reach dynamic equilibrium in a sealed container. Specification Point 3.20C - Know that at dynamic equilibrium the forward and reverse reactions occur at the same rate and the concentrations of reactants and products remain constant. Specification Point 3.21C - Understand why a catalyst does not affect the position of equilibrium in a reversible reaction. Specification Point 3.22C - Know the effect of changing either temperature or pressure on the position of equilibrium in a reversible reaction. Complete set of Chapter 6 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 28 - Rates of Reaction. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 3.9 - Describe experiments to investigate the effects of changes in surface area of a solid, concentration of a solution, temperature and the use of a catalyst on the rate of a reaction. Specification Point 3.10 - Describe the effects of changes in surface area of a solid, concentration of a solution, pressure of a gas, temperature and the use of a catalyst on the rate of a reaction. Specification Point 3.11 - Explain the effects of changes in surface area of a solid, concentration of a solution, pressure of a gas and temperature on the rate of a reaction in terms of particle collision theory. Specification Point 3.12 - Know that a catalyst is a substance that increases the rate of a reaction, but is chemically unchanged at the end of the reaction. Specification Point 3.13 - Know that a catalyst works by providing an alternative pathway with lower activation energy. Specification Point 3.15 - Practical: investigate the effect of changing the surface area of marble chips and of changing the concentration of hydrochloric acid on the rate of reaction between marble chips and dilute hydrochloric acid. Specification Point 3.16 - Practical: investigate the effect of different solids on the catalytic decomposition of hydrogen peroxide solution. Complete set of Chapter 6 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 32 - Crude Oil. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.7 - Know that crude oil is a mixture of hydrocarbons. Specification Point 4.8 - Describe how the industrial process of fractional distillation separates crude oil into fractions. Specification Point 4.9 - Know the names and uses of the main fractions obtained from crude oil. Specification Point 4.10 - Know the trend in colour, boiling point and viscosity of the main fractions.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 35 - Organic Compounds Part 2. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.29C - Know that alcohols contain the functional group −OH. Specification Point 4.30C - Understand how to draw structural and displayed formulae for methanol, ethanol, propanol and butanol and name each compound. Specification Point 4.31C - Know that how ethanol can be oxidised. Specification Point 4.32C - Know how ethanol can be manufactured. Specification Point 4.33C - Understand the reasons for fermentation, in the absence of air, and at an optimum temperature. Specification Point 4.34C - Know that carboxylic acids contain the functional group -COOH. Specification Point 4.35C - Understand how to draw structural and displayed formulae for unbranched-chain carboxylic acids with up to four carbon atoms in the molecule, and name each compound. Specification Point 4.36C - Describe the reactions of aqueous solutions of carboxylic acids with metals and metal carbonates. Specification Point 4.37C - Know that vinegar is an aqueous solution containing ethanoic acid. Complete set of Chapter 7 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 4.38C - Know that esters contain the functional group -COO-. Specification Point 4.39C - Know that ethyl ethanoate is the ester produced when ethanol and ethanoic acid react in the presence of an acid catalyst. Specification Point 4.40C - Understand how to write the structural and displayed formulae of ethyl ethanoate. Specification Point 4.41C - Understand how to write the structural and displayed formulae of an ester, given the name or formula of the alcohol and carboxylic acid from which it is formed and vice versa. Specification Point 4.42C - Know that esters are volatile compounds with distinctive smells and are used as food flavourings and in perfumes. Specification Point 4.43C - Practical: prepare a sample of an ester such as ethyl ethanoate. Complete set of Chapter 7 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 36 - Esters. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.38C - Know that esters contain the functional group -COO-. Specification Point 4.39C - Know that ethyl ethanoate is the ester produced when ethanol and ethanoic acid react in the presence of an acid catalyst. Specification Point 4.40C - Understand how to write the structural and displayed formulae of ethyl ethanoate. Specification Point 4.41C - Understand how to write the structural and displayed formulae of an ester, given the name or formula of the alcohol and carboxylic acid from which it is formed and vice versa. Specification Point 4.42C - Know that esters are volatile compounds with distinctive smells and are used as food flavourings and in perfumes. Specification Point 4.43C - Practical: prepare a sample of an ester such as ethyl ethanoate.

Complete set of companion PDF worksheets for Edexcel IGCSE Chemistry (4CH1) Chapter 7 - Organic Chemistry. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Eight worksheets included: 31 - Organic Compounds 32 - Crude Oil 33 - Burning Hydrocarbons 34 - Alkanes and Alkenes 35 - Organic Compounds Part 2 36 - Esters 37 - Addition Polymers 38 - Condensation Polymers

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.3 - Attachment. Explanations of attachment: learning theory and Bowlby’s monotropic theory. The concepts of a critical period and an internal working model. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.3 - Attachment. Bowlby’s theory of maternal deprivation. Complete set of Chapter 3 Lectures are available.

Complete set of concise, modern presentations for AQA A Level Psychology (7181 and 7182) Chapter 2 - Memory. Contains colour coded specification points. Four presentations included: 5 - Types of Memory 6 - Memory Models 7 - Forgetting 8 - Eyewitness Testimony