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Science Quiz – Test 3

Science quiz, test 3 of 19: 10 multiple-choice questions with answers. Try them, then play the interactive quiz on Zeno to earn XP.

  1. Question 21

    What is the most abundant gas in the Earth's atmosphere after nitrogen?

    • A Carbon dioxide
    • B Argon
    • C Oxygen
    • D Hydrogen
    Show answer

    Correct answer: Oxygen

  2. Question 22

    What is the most abundant element in the Earth's crust?

    • A Iron
    • B Oxygen
    • C Silicon
    • D Aluminum
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    Correct answer: Oxygen

  3. Question 23

    What is the most common element in the human body by mass?

    • A Nitrogen
    • B Oxygen
    • C Hydrogen
    • D Carbon
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    Correct answer: Oxygen

  4. Question 24

    What is the most abundant type of star in the Milky Way galaxy?

    • A Blue giants
    • B Yellow supergiants
    • C White dwarfs
    • D Red dwarfs
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    Correct answer: Red dwarfs

  5. Question 25

    What is the process by which plants convert sunlight into energy?

    • A Transpiration
    • B Photosynthesis
    • C Respiration
    • D Chemosynthesis
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    Correct answer: Photosynthesis

  6. Question 26

    What is the process by which bacteria convert nitrogen gas from the atmosphere into ammonia?

    • A Denitrification
    • B Nitrogen fixation
    • C Ammonification
    • D Nitrification
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    Correct answer: Nitrogen fixation

  7. Question 27

    What is the primary mechanism by which plants lose water to the atmosphere?

    • A Evaporation
    • B Condensation
    • C Photosynthesis
    • D Transpiration
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    Correct answer: Transpiration

  8. Question 28

    What is the most abundant type of lipid found in cell membranes?

    • A Phospholipids
    • B Triglycerides
    • C Steroids
    • D Cholesterol
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    Correct answer: Phospholipids

  9. Question 29

    What is the most common type of rock found in the Earth's crust?

    • A Granite rock
    • B Sedimentary rock
    • C Metamorphic rock
    • D Igneous rock
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    Correct answer: Igneous rock

  10. Question 30

    What is the most abundant element in the Earth's core?

    • A Oxygen
    • B Silicon
    • C Nickel
    • D Iron
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    Correct answer: Iron

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