A student investigates the greenhouse effect of three different gases (A\text{A}A, B\text{B}B, and C\text{C}C) by measuring the temperature rise of the gas inside a sealed flask when exposed to an infrared lamp for 151515 minutes.
The student's results are shown in the table below:
| Gas in flask | Temperature change (∘C^\circ\text{C}∘C) |
|---|---|
| Air (control)\text{Air (control)}Air (control) | +1.5+1.5+1.5 |
| Gas A\text{Gas A}Gas A | +4.2+4.2+4.2 |
| Gas B\text{Gas B}Gas B | +8.7+8.7+8.7 |
| Gas C\text{Gas C}Gas C | +12.1+12.1+12.1 |
Explain why the temperature increases more in the flasks containing Gas A\text{Gas A}Gas A, Gas B\text{Gas B}Gas B, and Gas C\text{Gas C}Gas C compared to the air control, with reference to the greenhouse effect.
Describe a valid experimental method to find the relative greenhouse warming effect of an unknown gas, Y\text{Y}Y, in this ranking. State two variables that must be kept constant.
Describe the main components of a fully labelled diagram illustrating the greenhouse effect on Earth. Include the relative wavelengths of incoming and outgoing radiation, and how greenhouse gases interact with this radiation.
13 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 atmosphere, 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.