Lesson 5.9.1.3

5.9.1.3 How oxygen increased Quiz: AQA Combined Science, Unit 16

20 questions

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Lesson 5.9.1.3, How oxygen increased: 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 16: Chemistry of the atmosphere, written with Revision Ninja.

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The 20 questions

  1. Which process produced most of the oxygen in the Earth's atmosphere?

    • Combustion
    • Photosynthesis
    • Respiration
    • Volcanic outgassing
  2. Roughly when did algae first produce oxygen on Earth?

    • 2.7 billion years ago
    • 500 thousand years ago
    • 1.0 million years ago
    • 4.6 billion years ago
  3. Which chemical equation correctly summarises the process of photosynthesis that released oxygen?

    • Methane plus oxygen
    • Nitrogen plus water
    • Oxygen plus glucose
    • Carbon dioxide plus water
  4. Over approximately how long did the atmospheric oxygen percentage gradually rise?

    • Fifty million years
    • One billion years
    • One hundred years
    • Ten thousand years
  5. The gradual increase in atmospheric oxygen eventually enabled the evolution of what?

    • Viruses
    • Bacteria
    • Fungi
    • Animals
  6. Which organisms were the first oxygen producers in this account?

    • Fungi
    • Algae
    • Early fish
    • Land animals
  7. What is the correct product of photosynthesis released into the air?

    • Methane
    • Carbon dioxide
    • Nitrogen
    • Oxygen
  8. What gas do aquatic plants produce during daylight hours?

    • Ammonia
    • Oxygen
    • Helium
    • Hydrogen
  9. A water plant in bright sunlight gives off gas bubbles. Which gas are the bubbles most likely to be?

    • Methane
    • Nitrogen dioxide
    • Carbon dioxide
    • Oxygen
  10. What happens to the oxygen level when a plant is kept in the dark?

    • Rises rapidly
    • Falls slightly
    • Doubles instantly
    • Remains completely unchanged
  11. Which organisms were the very first to produce oxygen on Earth?

    • Land plants
    • Algae
    • Animals
    • Bacteria
  12. Why was a high oxygen level necessary for animal evolution?

    • Transpiration
    • Aerobic respiration
    • Nitrogen fixation
    • Photosynthesis
  13. Has the percentage of oxygen in the atmosphere always been 21%?

    • Yes
    • Always 10%
    • Always 50%
    • No
  14. Algae producing oxygen 2.7 billion years ago implies what was present?

    • Flowering plants
    • Photosynthetic life
    • Land mammals
    • Vertebrate animals
  15. Which geological evidence indicates when oxygen first accumulated in the oceans?

    • Banded iron formations
    • Granite rock layers
    • Sandstone deposits
    • Basalt lava flows
  16. If oxygen rose over one billion years after starting at 2.7 billion years ago, when was animal evolution enabled?

    • 2.7 billion years ago
    • 3.7 billion years ago
    • 0.7 billion years ago
    • 1.7 billion years ago
  17. What condition allows an atmospheric gas to build up over time?

    • Production equals consumption
    • Production exceeds consumption
    • Consumption exceeds production
    • Zero production occurs
  18. What form of energy is stored in the products of photosynthesis?

    • Kinetic energy
    • Chemical energy
    • Thermal energy
    • Nuclear energy
  19. Which organisms were the primary source of early atmospheric oxygen?

    • Algae and plants
    • Fish and amphibians
    • Bacteria and viruses
    • Animals and fungi
  20. What is the primary role of oxygen in animal respiration?

    • Releasing energy
    • Building proteins
    • Cooling the body
    • Absorbing sunlight

All AQA Combined Science quizzes