Chemistry Paper 2
Earth's atmosphere
Chemistry of the Atmosphere training before the targeted original question drill.
Adaptive teaching card
Make it concrete
Analogy
Earth's atmosphere is like changing a recipe: the particles, amounts and conditions decide what product you can make.
Why now: An analogy helps when the definition feels abstract.
Do this: Match each part of the analogy to the science idea.
Learn it
The early atmosphere contained more carbon dioxide and little oxygen.
Photosynthesis increased oxygen levels.
Greenhouse gases absorb infrared radiation.