1. What made the atmosphere contain oxygen?
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Other questions in this quiz
2. What is the Earth's structure?
- Crust, Core, Mantle
- Inner Core, Outer Core, Mantle, Crust
- Core, Mantle, Crust
- Crust, Mantle, Outer Core, Inner Core
3. What percenage of our atmosphere is CO2?
4. The crust is made up of...
- techtonic plates
- china plates
- paper plates
5. What percentage of our atmosphere is oxygen?