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How Earth's atmosphere changed over time

9th grade (Year 10 in England) · 10 questions · Common Core: NGSS.HS-ESS2-7, NGSS.HS-ESS1-6 · England: GCSE Combined Science: Chemistry of the atmosphere

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  1. Question 1

    Why did the amount of carbon dioxide in the early atmosphere decrease?

    • A. It turned into nitrogen
    • B. It dissolved in oceans, was used in photosynthesis and was locked in rocks and fossil fuels
    • C. Volcanoes absorbed it
    • D. It escaped into space

  2. Question 2

    Dry air is about 78 % nitrogen. In 100 cm³ of air, roughly what volume is nitrogen, in cm³?

    Answercm³

  3. Question 3

    Which gas makes up most of today's atmosphere?

    • A. nitrogen
    • B. oxygen
    • C. carbon dioxide
    • D. argon

  4. Question 4

    Today's dry air is about 78 % nitrogen and 21 % oxygen. What percentage is made up of all the other gases together?

    Answer%

  5. Question 5

    Which gas makes up most of today's atmosphere?

    • A. oxygen
    • B. argon
    • C. nitrogen
    • D. carbon dioxide

  6. Question 6

    Today's dry air is about 78 % nitrogen and 21 % oxygen. What percentage is made up of all the other gases together?

    Answer%

  7. Question 7

    Scientists think the early atmosphere was mostly carbon dioxide, like Venus and Mars today. Why are they not certain?

    • A. Venus has no atmosphere
    • B. There is limited direct evidence from billions of years ago
    • C. The atmosphere has never changed
    • D. Nobody has studied rocks

  8. Question 8

    Dry air is about 78 % nitrogen. In 500 cm³ of air, roughly what volume is nitrogen, in cm³?

    Answercm³

  9. Question 9

    Scientists think the early atmosphere was mostly carbon dioxide, like Venus and Mars today. Why are they not certain?

    • A. Nobody has studied rocks
    • B. Venus has no atmosphere
    • C. There is limited direct evidence from billions of years ago
    • D. The atmosphere has never changed

  10. Question 10

    Dry air is about 21 % oxygen. In 100 cm³ of air, roughly what volume is oxygen, in cm³?

    Answercm³

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  1. It dissolved in oceans, was used in photosynthesis and was locked in rocks and fossil fuels
  2. 78 cm³
  3. nitrogen
  4. 1 %
  5. nitrogen
  6. 1 %
  7. There is limited direct evidence from billions of years ago
  8. 390 cm³
  9. There is limited direct evidence from billions of years ago
  10. 21 cm³