Welcome to the Quiz!
This quiz contains 10 questions from a mix of 1 subtopics.
Roughly how old is the planet Earth?
Around 2.7 billion years old
Around 13.7 billion years old
Around 4.6 billion years old
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Which gas makes up around 80% (78.09% to be exact) of the Earth's atmosphere?
Oxygen
Nitrogen
Carbon dioxide
Argon
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Which gas makes up around 20% (20.95% to be exact) of the Earth's atmosphere?
Argon
Oxygen
Carbon dioxide
Nitrogen
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Which of the gases below contribute less than 1% to the Earths atmosphere?
(Select all that apply)
Argon
Nitrogen
Oxygen
Carbon dioxide
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In the first billion years, the gases that formed Earth's early atmosphere came mainly from which source?
Volcanic activity
Photosynthesis by plants and algae
Burning of fossil fuels
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During the first billion years, which two of the following gases were released from volcanoes?
Water vapour
Carbon dioxide
Oxygen
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Cooling of the Earth
dissolved / cool / warm / sediments / condense / oceans / carbonates
- Around a billion years after it formed, the earth began to . This allowed water vapour to into liquid water and form the .
- When the oceans formed, carbon dioxide in the water, and were precipitated, producing .
- Steps 1 & 2 dramatically reduced the amounts of water vapour and carbon dioxide in the atmosphere.
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Starting 2.7 billion years ago, which process started to increase the amount of oxygen in the atmosphere, and further decreased the amount of carbon dioxide?
Burning of fossil fuels
Photosynthesis by plants and algae
Volcanic activity
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Complete the word equation for photosynthesis:
carbon dioxide + ➔ oxygen +
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As photosynthetic organisms such as plants and algae died, the carbon they contained became trapped in rocks, and fuels.
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