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Questions and Answers
What is the current atmospheric methane concentration?
What is the current atmospheric methane concentration?
- 1000 ppm
- 500 ppm
- 2000 ppb
- 1900 ppb (correct)
At what concentration does methane have an anti-greenhouse effect?
At what concentration does methane have an anti-greenhouse effect?
- 1900 ppb
- 500 ppb
- 1000 ppm (correct)
- 2000 ppm
Which minerals weather rapidly when exposed to oxygen?
Which minerals weather rapidly when exposed to oxygen?
- Uraninite and pyrite (correct)
- Gypsum and halite
- Calcite and dolomite
- Quartz and feldspar
In which rock sequences were the observed 2.45 Ga old rock sequences also found?
In which rock sequences were the observed 2.45 Ga old rock sequences also found?
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