Across
- 3. The first man to walk on the moon
- 5. The planet we live on
- 7. The shape with four equal sides
- 8. The main material used to make books
- 10. The currency used in South Korea
- 11. The hardest natural substance on Earth
- 12. The largest organ in the human body
- 14. The country that invented pizza
- 15. The fruit that keeps the doctor away
- 16. The chemical element with the symbol "Au."
- 17. The animal known as "King of the Jungle."
Down
- 1. The tallest mountain in the world
- 2. The country where the Eiffel Tower is located
- 4. The month with the fewest days
- 6. The famous scientist who developed the laws of motion
- 7. The season that comes after winter
- 9. The longest river in South America
- 12. The opposite of big
- 13. The country known for its tulips and windmills