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Atmospheric composition, climate change and air pollution · GCSE Chemistry · Courselo

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GCSE Chemistry
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Analysis, environment and practical skills

Atmospheric composition, climate change and air pollution

Analysis, environment and practical skills · Lesson 4 of 6

Lesson 4 of 6

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Unit 8

Analysis, environment and practical skills

6 lessons · 9 h 30 min of study

Qualitative analysis of gases, cations and anions2 h of study
Purity, formulations, chromatography and Rf values1 h 30 min of study
Instrumental analysis and flame emission spectroscopy1 h of study
Atmospheric composition, climate change and air pollutionReading · 0%
Water treatment, resource use and sustainable materials1 h 30 min of study

This unit is ≈9% of the GCSE Chemistry, across 6 lessons. Full syllabus

Lesson 4 of 6 · Analysis, environment and practical skills

Atmospheric composition, climate change and air pollution

3 quick checks≈2% of the testCore: Core: tested on most papers

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By the end you’ll be able to

state the approximate composition of the present atmosphere and identify nitrogen and oxygen as the main components, with smaller amounts of argon, carbon dioxide and variable water vapour
describe the evidence-based stages in the evolution of Earth’s early atmosphere, including volcanic activity, formation of oceans, carbon dioxide decrease, and oxygen increase due to photosynthesis

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Adaptive questions on atmospheric composition, climate change and air pollution.

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Practical skills, planning, measurement, evaluation and exam strategy2 h of study

explain the greenhouse effect in terms of infrared absorption and re-emission by greenhouse gases, and describe the role of carbon dioxide, methane and water vapour

evaluate evidence for climate change, including human activities that increase greenhouse gas concentrations such as combustion of fossil fuels, deforestation and agriculture

describe the sources and effects of major air pollutants, including carbon monoxide, sulfur dioxide, oxides of nitrogen and particulates

explain methods used to reduce emissions and atmospheric pollution, including catalytic converters, flue gas desulfurisation, cleaner fuels and controls on particulate emissions

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