Question

1

This question is about the Earth and its atmosphere.
Figure 1 shows the Earth and its atmosphere billions of years ago.
The boiling point of water is 100°C.
Suggest one reason why there was no liquid water on the Earth's surface billions of
years ago.

Earth's early
atmosphere of:
• carbon dioxide
• water vapour
• methane
• ammonia

Answer 1

water vapour

Step-by-step explanation:

allow the Earth’s surface

temperature was too/very hot

or water evaporated/ boiled

or turned to steam/gas

allow because of heat from

volcanoes

ignore the Earth’s surface

was covered by volcanoes

ignore water turned to water

vapour