A useful resource for students to practice their knowledge and examination technique for future external assessments. This is for the following paper: 4CH1 - 2C This mock is based on our 2022 Predicted Papers. These questions are completely original and have been designed from scratch. There has been no reuse of previous exam questions. Our mock paper follows the format of the true Edexcel IGCSE Chemistry 2C paper closely. It is also the exact duration and mark-count, with questions of increasing difficulty. A mark scheme is also attached. The paper covers the following specification points: • Topic 1e - Chemical formulae, equations and calculations (1.25 – 1.36) • Topic 1i - Electrolysis (1.55C – 1.60C) • Topic 2b - Group 7 (2.5 – 2.8C) • Topic 2c - Gases in the atmosphere (2.9 – 2.14) • Topic 2e - Extraction and uses of metals (2.22C – 2.27C) • Topic 2f - Acids, alkalis and titrations (2.28 – 2.33C) • Topic 2h - Chemical tests (2.44 – 2.50) • Topic 3a - Energetics (including practical 3.8) (3.1 – 3.8) • Topic 4f - Carboxylic acids (4.34C – 4.37C) • Topic 4h - Synthetic polymers (4.44 – 4.50C) Disclaimer: This document was created by department heads with many years of experience teaching the Pearson Edexcel IGCSE Chemistry course. We cannot however guarantee that it is an accurate representation of upcoming examinations and students should not treat it as such. Please use this as an aid, alongside other methods of revision.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.2 - Relationships. The evolutionary explanations for partner preferences, including the relationship between sexual selection and human reproductive behaviour. Complete set of Chapter 9 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.1 - Issues and debates in psychology. Idiographic and nomothetic approaches to psychological investigation. Complete set of Chapter 8 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.2 - Relationships. Factors affecting attraction in romantic relationships: self-disclosure; physical attractiveness, including the matching hypothesis; filter theory, including social demography, similarity in attitudes and complementarity. Complete set of Chapter 9 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.1 - Issues and debates in psychology. Free will and determinism: hard determinism and soft determinism; biological, environmental and psychic determinism. The scientific emphasis on causal explanations. Complete set of Chapter 8 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.3.1 - Scientific Processes. Variables: manipulation and control of variables, including independent, dependent, extraneous, confounding; operationalisation of variables. Control: random allocation and counterbalancing, randomisation and standardisation. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.3.1 - Scientific Processes. Features of science: objectivity and the empirical method; replicability and falsifiability; theory construction and hypothesis testing; paradigms and paradigm shifts. Reliability across all methods of investigation. Ways of assessing reliability: test-retest and inter-observer; improving reliability. Types of validity across all methods of investigation: face validity, concurrent validity, ecological validity and temporal validity. Assessment of validity. Improving validity. Reporting psychological investigations. Sections of a scientific report: abstract, introduction, method, results, discussion and referencing. The role of peer review in the scientific process. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.3.1 - Scientific Processes. Demand characteristics and investigator effects. Ethics, including the role of the British Psychological Society’s code of ethics; ethical issues in the design and conduct of psychological studies; dealing with ethical issues in research. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.1 - Issues and debates in psychology. Gender and culture in psychology – universality and bias. Gender bias including androcentrism and alpha and beta bias. Cultural bias, including ethnocentrism and cultural relativism. Complete set of Chapter 8 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.3.2 - Data handling and analysis. Quantitative and qualitative data; the distinction between qualitative and quantitative data collection techniques. Primary and secondary data, including meta-analysis. Descriptive statistics: measures of central tendency – mean, median, mode; calculation of mean, median and mode; measures of dispersion; range and standard deviation; calculation of range. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.3.2 - Data handling and analysis. Calculation of percentages; positive, negative and zero correlations. Distributions: normal and skewed distributions; characteristics of normal and skewed distributions. Presentation and display of quantitative data: graphs, tables, scattergrams, bar charts, histograms. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2 - Biopsychology. Biological rhythms: circadian, infradian and ultradian and the difference between these rhythms. The effect of endogenous pacemakers and exogenous zeitgebers on the sleep/wake cycle. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.3.1 - Scientific Processes. Pilot studies and the aims of piloting. Experimental designs: repeated measures, independent groups, matched pairs. Observational design: behavioural categories; event sampling; time sampling. Questionnaire construction, including use of open and closed questions; design of interviews. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.3 - Research Methods. Experimental method. Types of experiment, laboratory and field experiments; natural and quasi-experiments. Observational techniques. Types of observation: naturalistic and controlled observation; covert and overt observation; participant and non-participant observation. Self-report techniques. Questionnaires; interviews, structured and unstructured. Content analysis. Case studies. Correlations. Analysis of the relationship between co-variables. The difference between correlations and experiments. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.9 - Know the approximate percentages by volume of the four most abundant gases in dry air. Specification Point 2.10 - Understand how to determine the percentage by volume of oxygen in air using experiments involving the reactions of metals and non-metals with air. Specification Point 2.11 - Describe the combustion of elements in oxygen, including magnesium, hydrogen and sulphur. Specification Point 2.12 - Describe the formation of carbon dioxide from the thermal decomposition of metal carbonates, including copper (II) carbonate. Specification Point 2.13 - Know that carbon dioxide is a greenhouse gas and that increasing amounts in the atmosphere may contribute to climate change. Specification Point 2.14 - Practical: determine the approximate percentage by volume of oxygen in air using a metal or a non-metal. Complete set of Chapter 4 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.1 - Approaches in psychology. The cognitive approach: the study of internal mental processes, the role of schema, the use of theoretical and computer models to explain and make inferences about mental processes. The emergence of cognitive neuroscience. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.1 - Approaches in psychology. The biological approach: the influence of genes, biological structures and neurochemistry on behaviour. Genotype and phenotype, genetic basis of behaviour, evolution and behaviour. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2 - Biopsychology. The divisions of the nervous system: central and peripheral (somatic and autonomic). The structure and function of sensory, relay and motor neurons. The process of synaptic transmission, including reference to neurotransmitters, excitation and inhibition. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2 - Biopsychology. The function of the endocrine system: glands and hormones. The fight or flight response including the role of adrenaline. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.1 - Understand how the similarities in the reactions of the group 1 elements with water provide evidence for their recognition as a family of elements. Specification Point 2.2 - Understand how the differences between the reactions of the alkali metals with air and water provide evidence for the trend in reactivity in group 1. Specification Point 2.3 - Use knowledge of trends in group 1 to predict the properties of other alkali metals. Specification Point 2.4C - Explain the trend in reactivity in group 1 in terms of electronic configurations. Complete set of Chapter 4 Lessons are available.