The Atmosphere
Cards (24)
- What is the main gas in the atmosphere today?
- What percentage of the atmosphere is oxygen?
- What are the small proportions of other gases in the atmosphere?
- How long have the gases in the atmosphere remained constant?
- How old is the Earth?
- What caused the early atmosphere to form?
- What gas was released by volcanoes that contributed to the early atmosphere?
- What happened to water vapor as the Earth cooled?
- What was the main composition of the early atmosphere?
- How does the early atmosphere compare to Mars and Venus today?
- What other gases did volcanoes release besides carbon dioxide?
- What were the two main differences between the early atmosphere and today’s atmosphere?
- What happened to carbon dioxide as oceans formed?
- What did the weak acid formed from carbon dioxide react with?
- What did the reaction of carbon dioxide with minerals form?
- How did corals and shells contribute to carbon dioxide levels?
- What significant event occurred around 2.7 billion years ago?
- What process produced oxygen in the early atmosphere?
- What did photosynthesis take in besides producing oxygen?
- What happened to carbon during photosynthesis?
- What are the key changes in the atmosphere from early to present?
- What is the equation of photosynthesis?
- How are fossil fuels formed?
- Where can students find questions on the atmosphere?