Across
- 4. Man made things are also called
- 6. Hunger is _______ type of stimulus
- 8. insects breathe through
- 9. fish breathe through
- 11. Bright light is _________ type of stimulus
- 12. humans breathe through
- 13. Living things breathe to stay alive
- 14. Things found in nature not made by man
Down
- 1. All living things respond to this
- 2. Plants produce ___________ for us to breathe.
- 3. food gives living things
- 5. all living things ______ in size in their life
- 7. movement of living things from one place to another
- 10. plants breathe through