Q77
General ScienceEnvironment & Ecology
If there were no atomsphere, the earth would have been
- a.Slightly hot
- b.Slightly cold
- c.Very hot
- d.Very cold
Answer: (D) Very cold
The atmosphere acts as a blanket trapping heat through the greenhouse effect, maintaining Earth's average surface temperature at around 15°C. Without an atmosphere, this insulating effect would be lost and temperatures would drop as low as −18°C on average — similar to the Moon's dark side — making Earth 'very cold.' The Sun's heat would still arrive, but radiate away immediately at night.