Which are true and which are false?
1: the increase in carbon dioxide since the year 1860 is similar to the past increases.
2: atmospheric composition has remained constant throughout earths history.
3: climate has changed naturally over earths history
4: Earth is currently in an intergalactic period
Climate change over time quick check
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Earth's most recent glacial period ended about (11,500) years ago.
The Great Oxygenation Event began about (2.3 billion) years ago.
About (160) years ago carbon dioxide began increasing exponentially to unprecedented levels.
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Between 400,000 years ago until 1950, the levels of carbon dioxide in the atmosphere never exceeded (300) parts per million. Today, carbon dioxide levels have exceeded (410) parts per million.
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TRUE
- Climate has changed naturally over Earth's history.
- Earth is currently in a interglacial period.
FALSE
- The increase in carbon dioxide since the year 1860 is similar to past increases.
- Atmospheric composition has remained constant throughout earth's history.