Across
- 4. speed with direction
- 8. eyeglasses
- 11. removal of waste
- 13. first element
- 16. plants prepare food
- 17. smallest unit of matter
- 18. energy from earth
- 20. our galaxy
Down
- 1. unit of force
- 2. disease on global scale
- 3. hottest planet
- 5. makes windmills turn
- 6. bending of light
- 7. thermometer
- 9. any kind of power
- 10. length of shortest path travelled by body
- 12. path of light energy
- 13. balloons filled with
- 14. produce CFC
- 15. plant science
- 19. biological mass