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Exam-style practice

Air quality and climate answer explanations

Review worked answers and explanations for Air quality and climate. Aligned to Cambridge IGCSE Combined Science.

Answer explanations

Question 1 of 12

Review the answer support, then move sideways through the set.

Paper 3 structured question: Air quality and climate

Paper 3Theory (Core)2 marks

Description

Composition of Clean, Dry Air

Clean, dry air consists of approximately 78% nitrogen, 21% oxygen, and the remaining 1% is made up of noble gases and carbon dioxide.

  1. a

    Identify List the main components of clean, dry air and their approximate percentages.

    [2]