Science Crossword
Across
- 2. substance that has two or more elements in it
- 4. does not allow water to pass through
- 7. does not allow light through
- 10. our planet
- 12. earth's star
- 17. active during the night
- 18. weather conditions
- 19. substances used in chemistry experiments
Down
- 1. unit of energy or work
- 3. top layer of land on the Earth's surface
- 5. it is measure in Newtons (N)
- 6. belonging to or living in water
- 8. single celled organism
- 9. group of atoms
- 11. Mixture of 2 or more metals
- 13. everything that exists
- 14. how much room something takes up
- 15. found in the nucleus
- 16. living beings that fly
- 20. Helps us breathe