Across
- 2. – A book that explains word meanings
- 5. – Money used in a particular country
- 8. – A triangular ancient structure built in Egypt
- 9. – A mountain that can erupt with lava
- 11. – The natural home of an animal
- 12. – The force that pulls objects toward Earth
- 16. – The process plants use to make food from sunlight
- 19. – One of Earth’s large land masses
- 20. – A type of math using letters and symbols
Down
- 1. – A massive system of stars and planets
- 3. – A vast body of saltwater covering most of Earth
- 4. – A number representing part of a whole
- 6. – The study of substances and reactions
- 7. – A tool used to measure temperature
- 10. – A vehicle with two wheels powered by pedaling
- 13. – A community of living organisms and their environment
- 14. – A person trained to travel in space
- 15. – Something new that has been created
- 17. – A tool used for navigation and direction
- 18. – The ability to do work or cause change