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WorksheetsE.S. 10/2 Atmosphere evolution
Total questions: 8
Worksheet time: 5mins
Name
Class
Date
1.
What 2 gases were on the Earth at the very beginning?
a)
O2 and He
b)
H2 and He
c)
N and O
d)
C and N
2.
Why did the first gases on the Earth escape?
a)
lack of gravity
b)
Too many bugs
c)
Plants absorbed them
3.
The second atmosphere, volcanoes appeared and released ________ and _____________.
a)
water and oxygen
b)
carbon dioxide and nitrogen
c)
nitrogen and water
d)
Helium and carbon dioxide
4.
CO2, CO, and water vapor was retrained on Earth because ______________________.
a)
The moon was formed
b)
The sun was stronger
c)
Plant life grew
d)
The Earth was round
5.
The first plant was ______________.
a)
kelp
b)
seaweed
c)
blue-green algae
d)
pine tree
6.
The first plant had to form in ocean because ______________________.
a)
no ozone and the sun was too harsh
b)
lack of water on land
c)
the land was molten lava
7.
What's the key in making oxygen for animals to survive?
a)
water
b)
sunlight
c)
the moon
d)
plant respiration
8.
How do we know about the early existence of the Earth atmosphere?
a)
ice cores in Greenland and antarctica
b)
the dinosaurs wrote it in caves
c)
we really have no clue
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