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Science & Nature: General Knowledge

From the natural world to everyday science — a broad mix of fascinating facts about science and nature!

❓ 20 Questions
⏱ 20s Per Question
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About the Science & Nature: General Knowledge

The Science & Nature: General Knowledge is a free easy-level General Knowledge quiz featuring 20 multiple-choice questions. From the natural world to everyday science — a broad mix of fascinating facts about science and nature! Each question comes with a 20-second countdown timer and instant explanations after every answer so you can learn as you play. This quiz is completely free on GoKwiz — no account or sign up required.

Science & Nature: General Knowledge — Practice Questions

1. How many bones does an adult human body have?

  1. 176
  2. 206
  3. 226
  4. 256

2. What is the largest organ in the human body?

  1. Brain
  2. Liver
  3. Lungs
  4. Skin

3. What is the closest star to Earth (after the Sun)?

  1. Betelgeuse
  2. Proxima Centauri
  3. Sirius
  4. Vega

4. What gas do plants absorb from the atmosphere during photosynthesis?

  1. Carbon dioxide
  2. Hydrogen
  3. Nitrogen
  4. Oxygen

5. How long does it take light from the Sun to reach Earth?

  1. About 2 hours
  2. About 2 minutes
  3. About 30 minutes
  4. About 8 minutes

6. What is the world's largest mammal?

  1. African elephant
  2. Blue whale
  3. Giraffe
  4. Sperm whale

7. What is DNA an abbreviation of?

  1. Deoxyribonucleic acid
  2. Dioxyribonucleic acid
  3. Dual Nucleic Array
  4. Dynamic Nucleic Acid

8. Which planet is known as the Red Planet?

  1. Jupiter
  2. Mars
  3. Saturn
  4. Venus

9. What is the name of the layer of gases surrounding a planet?

  1. Atmosphere
  2. Biosphere
  3. Hydrosphere
  4. Lithosphere

10. How many chambers does the human heart have?

  1. 2
  2. 3
  3. 4
  4. 6

11. Which animal has the longest lifespan?

  1. Bowhead whale
  2. Galapagos tortoise
  3. Greenland shark
  4. Ocean quahog clam

12. What causes a rainbow to appear?

  1. Reflection of light off water droplets
  2. Refraction and dispersion of light through water droplets
  3. Sunlight hitting ice crystals
  4. Temperature differences in the atmosphere

13. What is the powerhouse of the cell?

  1. Cell membrane
  2. Mitochondria
  3. Nucleus
  4. Ribosome

14. Which sense uses olfactory receptors?

  1. Hearing
  2. Sight
  3. Smell
  4. Taste

15. What is the most abundant gas in Earth's atmosphere?

  1. Argon
  2. Carbon dioxide
  3. Nitrogen
  4. Oxygen

16. What do caterpillars transform into?

  1. Beetles
  2. Butterflies or moths
  3. Dragonflies
  4. Flies

17. What is the speed of sound in air at sea level (approximately)?

  1. 1,000 m/s
  2. 3,000 m/s
  3. 343 m/s
  4. 500 m/s

18. Which organ filters blood and produces urine?

  1. Kidneys
  2. Liver
  3. Pancreas
  4. Spleen

19. What is bioluminescence?

  1. Light produced by burning chemicals
  2. Light produced naturally by living organisms
  3. The glow of radioactive materials
  4. The reflection of moonlight off water

20. How many eyes does a spider typically have?

  1. 2
  2. 4
  3. 6
  4. 8

Frequently Asked Questions

How many questions are in the Science & Nature: General Knowledge?

This quiz contains 20 questions.

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This quiz is rated easy difficulty, with a 20-second timer per question.

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Yes, as many times as you like. Questions and answer options are shuffled every time for a fresh experience. After finishing, you can also retry only the questions you got wrong.

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