Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 18 - Atmospheric Gases. Contains short answer questions, an activity requiring lateral thinking and exam-style questions.
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 Worksheets are available.
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