Across
- 2. a group of atoms bonded together
- 8. how plants respond to tough
- 9. the small number that tells you the amount of atoms of each element
- 10. how plants respond to water
- 12. a plant growth in response of stimulus
Down
- 1. smallest unit of an element
- 3. a substance made from 2 or more different elements that have been chemically joined
- 4. a substance that can't be broken into simpler substances by chemical means
- 5. how plants respond to gravity
- 6. how plants respond to light
- 7. the large number In front of a molecule that tells you how many molecules there are
- 11. the law of conservation of ... states