Science & Nature Trivia Questions

20 free science and nature trivia questions with answers — physics, biology, space, and the natural world. Click a question to reveal the answer.

1. 1.What gas do plants absorb from the air for photosynthesis?

   Carbon dioxide

2. 2.What is the closest star to Earth?

   The Sun

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

   206

4. 4.What is H2O more commonly known as?

   Water

5. 5.Which planet has the most prominent ring system?

   Saturn

6. 6.What is the largest animal ever known to have lived?

   The blue whale

7. 7.At what temperature does water boil at sea level, in Celsius?

   100 degrees

8. 8.What force pulls objects toward the center of the Earth?

   Gravity

9. 9.Which scientist proposed the theory of general relativity?

   Albert Einstein

10. 10.What is the hardest natural substance on Earth?

    Diamond

11. 11.Which organ pumps blood around the human body?

    The heart

12. 12.What do bees collect from flowers to make honey?

    Nectar

13. 13.Which element has the chemical symbol "O"?

    Oxygen

14. 14.What is a group of lions called?

    A pride

15. 15.How many legs does a spider have?

    Eight

16. 16.Which is the only planet in our solar system that spins on its side?

    Uranus

17. 17.What natural phenomenon is measured with the Richter scale?

    Earthquakes

18. 18.Which blood cells help the body fight infection?

    White blood cells

19. 19.What is the process by which caterpillars become butterflies?

    Metamorphosis

20. 20.Which gas makes up about 78% of Earth’s atmosphere?

    Nitrogen