Across
- 2. object that blocks light(6)
- 3. is what we hear when objects vibrate (5)
- 5. ----- is produced when light passes through a prism (8)
- 6. object that is see through (11)
- 10. gas that plants need (6,7)
- 12. green pigment in plants (11)
- 13. ----- determines the pitch of the sound (9)
- 14. ----- is when light changes direction (9)
- 15. is reflected sound (4)
- 16. part of the sound wave that changes with loudness (9)
- 18. light travels in ------ lines (8)
- 20. ------is created when light is blocked (6)
Down
- 1. plant cells that absorb water (4,4)
- 4. gas that plants releases (6)
- 5. plants store the sugars made as _______ (5)
- 7. how plants makes food (14)
- 8. is the unit for measuring loudness (7)
- 9. light that bounces off a mirror (9)
- 11. organ to anchor plants (5)
- 17. plant organ to trap sunlight (6)
- 19. is the unit for mesuring vibrations (5)