Across
- 1. someone who studies naturals sciences
- 4. Takes up space
- 6. rotating water made by opposing currents
- 9. in the center of the cell
- 10. study of matter
- 12. the amount of matter something has
- 13. hissing sound made during chemical reactions
- 15. need it to breath
- 16. A natural movement of air
- 17. table contains all the world's elements!
Down
- 2. part of the natural world
- 3. often a sign of chemical reactions
- 5. when something explodes
- 7. the basic unit of a chemical element
- 8. a column of air
- 10. basic unit of life
- 11. makes up everything
- 14. power to do work
- 18. a charged atom