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WorksheetsEarth
Total questions: 10
Worksheet time: 7mins
An orbital region around the sun that receives the right range of radiant energy to keep water in liquid form.
(a)
Liquid water is important to living things because it is an aqueous solution within which many chemical reactions take place.
True
False
It shields Earth against harmful cosmic rays
(a)
A region in the stratosphere that absorbs most of the Sun's UV rays.
(a)
Earth’s atmosphere is not unique in the solar system because it contains a mix of gases that support the formation of biomolecules.
True
False
The air is composed of how much oxygen?
21%
78%
1%
30%
Mars' air is composed of how much carbon dioxide?
30%
21%
78%
96%
Some 65 million years ago, an asteroid struck earth at the (a) which led to the extinction of dinosaurs.
Sudden flash of brightness near the surface of the Sun
Solar flares
Sunspots
Solar wind
Sun flash
Dark patches on the Sun's surface that appear from time to time.
Solar flares
Sunspots
Solar wind
Sun flash
