A website reports that global climate change has stopped. The report uses only the average global temperature for each of the last three years. Which is the strongest reason for treating this report with caution?
The report has not been checked by other scientists before publication
Three years of data cannot show whether the measurements were accurate
Three years is too short a period to show a trend in a variable climate
The report was written in order to persuade readers rather than inform
40 exam-style questions on AQA GCSE Chemistry 9.2 Carbon dioxide and methane as greenhouse gases, covering 9.2.1 Greenhouse gases, 9.2.2 Human activities which contribute to an increase in greenhouse gases in the, 9.2.3 Global climate change, and 9.2.4 The carbon footprint and its reduction. Each one has a worked solution and a mark scheme showing where the marks go.