A data set shows rising carbon dioxide but considerable year-to-year temperature variation. Which interpretation is best?
Short-term variation can occur within a longer-term trend
The long-term trend must be false
Carbon dioxide cannot affect temperature, as the data vary
One cooler year disproves greenhouse warming
97 exam-style questions on Edexcel GCSE Chemistry 9.2 Earth and atmospheric science, covering 9.2.1 The Earth's early atmosphere, 9.2.2 How the atmosphere evolved, 9.2.3 Chemical test for oxygen, and 9.2.4 The greenhouse effect and climate change. Each one has a worked solution and a mark scheme showing where the marks go.