Across
- 1. – The ability to do work
- 3. – Lines that run east and west on a map
- 6. – A drawing that shows places on Earth
- 9. – A person who writes books
- 11. – A part of a whole
- 13. – To reuse materials instead of throwing them away
- 14. – A gas humans need to breathe
- 17. – An animal that has fur or hair and feeds its young milk
- 20. – One of Earth’s seven large land masses
Down
- 2. – When water changes from a liquid to a gas
- 4. – A type of government where people vote
- 5. – A reptile that looks like a crocodile
- 7. – The condition of the atmosphere outside
- 8. – Tissue that helps the body move
- 10. – The natural home of a plant or animal
- 12. – A word that names a person, place, or thing
- 15. – A math sentence that shows two sides are equal
- 16. – An opening in Earth that releases lava
- 18. – A math operation for repeated addition
- 19. – A large object that orbits the sun