BRAINCAKEChemistry of the atmosphere
Revision notes for Chemistry of the atmosphere in AQA Combined Science: Trilogy (8464). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.
- The proportions of different gases in the atmosphereFor about 200 million years, the proportions of the gases in the Earth's atmosphere have been much the same as they are today.
- The Earth's early atmosphereThe Earth is about 4.6 billion years old, so there is very little evidence about its early atmosphere.
- How oxygen increasedThere was little or no oxygen in the early atmosphere.
- How carbon dioxide decreasedCarbon dioxide was the main gas in the early atmosphere, but today it is only a small proportion of the air.
- Greenhouse gasesSome gases in the atmosphere keep the Earth warm enough for life.
- Human activities which contribute to an increase in greenhouse gases in the atmosphereSome human activities increase the amount of greenhouse gases in the atmosphere.
- Global climate changeAn increase in the average global temperature is a major cause of climate change.
- The carbon footprint and its reductionThe carbon footprint is the total amount of carbon dioxide and other greenhouse gases emitted over the full life cycle of a product, service or event.
- Atmospheric pollutants from fuelsThe burning of fuels is a major source of atmospheric pollutants.
- Properties and effects of atmospheric pollutantsCarbon monoxide is a toxic gas.