Multiple choice

What was the average temperature on Earth when life first evolved?

  1. 70°F

  2. 90°F

  3. 100°F

  4. 200°F
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Early Earth was extremely hot due to volcanic activity and the lack of an atmosphere that could retain heat in a way conducive to current life. Estimates for the early environment suggest very high temperatures.

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