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#1. What scientific theory proposed that Earth revolves around the sun?
#2. Which planet is closest to the sun?
#3. Which is the only body part that is fully grown from birth?
#4. What is the smallest unit of matter?
#5. What is the process by which plants convert sunlight to energy?
#6. Where is the strongest human muscle located?
#7. Which planet has the most moons?
#8. What is the outermost layer of the Earth’s atmosphere called?
#9. What is the scientific theory that explains the origin of the universe?
#10. How many elements are in the periodic table?
#11. What is the name of the world's first artificial satellite?
#12. What is the chemical element with the symbol Fe?
#13. What is the process by which a liquid changes into a gas?
#14. How many bones do we have in an ear?
#15. Which planet in the Milky Way is the hottest?