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WorksheetsEarly Earth's Atmosphere
Total questions: 16
Worksheet time: 8mins
Scientists think the first atmosphere was formed by ......
gases from volcanoes
gases from animals
gases from plants
gases from the sea
What organisms do scientists think evolved first?
Bacteria & algae
Fish & grass
Birds & trees
Humans & animals
What process could algae carry out to make oxygen?
Photosynthesis
Respiration
Digestion
Phototropism
Why do scientists think there was no life on earth at first?
There was not enough oxygen.
There was not enough nitrogen.
There was not enough carbon dioxide.
There was not enough methane.
As water vapour cools, what happens to it?
It condenses and becomes a liquid.
It evaporates and becomes a gas.
It condenses and becomes a gas.
It evaporates and becomes a liquid.
The atmosphere today contains about ....
78% nitrogen and 21% oxygen
78% oxygen and 21% nitrogen
78% carbon dioxide and 21% oxygen
78% nitrogen and 21% carbon dioxide
When plants die and are buried, they formed what?
In the absence of oxygen, crude oil
In the presence of oxygen, coal
In the presence of oxygen, crude oil
In the absence of oxygen, coal
The early atmosphere contained a lot more water vapour than the modern atmosphere does. Where did it go?
It condensed to form the oceans
It escaped into space
It was absorbed by plants
What biochemical process absorbs carbon dioxide from the atmosphere and replaces it with oxygen?
Photosynthesis
Respiration
Digestion
Which of the following is the correct word equation for photosynthesis?
carbon dioxide + water →
glucose + oxygen
glucose → carbon dioxide + ethanol
glucose + oxygen → carbon dioxide + water
Which process removed carbon dioxide from the atmosphere?
Formation of sedimentary rocks
Formation of igneous rocks
Formation of metamorphic rocks
Which of the following is NOT
a fossil fuel?
Hydrogen
Crude oil
Coal
How long does it take to form fossil fuels?
Millions of years
Thousands of years
Hundreds of years
Which of these gases come from erupting volcanoes?
water vapour and carbon dioxide
ethane and carbon monoxide
oxygen and sulphur dioxide
hydrogen and helium
The air we breathe is made mostly of:
argon
carbon dioxide
nitrogen
oxygen
What percentage of our modern atmosphere is made up of other gases such as argon, water vapour, and carbon dioxide?
1%
21%
78%
17%
