Physics unit 1

1234567891011121314151617181920212223
Across
  1. 2. The surface of the earth
  2. 3. The unit of measurement of frequency
  3. 9. Change in direction of light
  4. 11. When an object is moving away from us and its wavelength becomes longer
  5. 13. The system where planets orbit the sun
  6. 15. Unit of measurement of for power
  7. 16. The theory that all planets orbit around the Earth
  8. 17. A type of lens that is curved on both sides to make it thinner in the middle
  9. 18. The colour that is best for absorbing heat
  10. 21. The theory that the universe has always existed
  11. 22. A type of wave that travels through the Earth
  12. 23. A change in the DNA caused by radiation
Down
  1. 1. The second stage in the life of a star
  2. 4. The number of waves passing through a point per second
  3. 5. A type of wave where particles move at right angles to the direction the wave is moving
  4. 6. How good a device is at creating useful energy
  5. 7. The man who discovered ultraviolet
  6. 8. A type of wave where particles move back and forth in line line with the direction of the wave
  7. 10. Sound waves that are bellow 20Hz
  8. 12. Light that we can see with the naked eye
  9. 14. Flow of charged particles
  10. 16. Astronomer who helped disproved geocentric by looking at the moons of Jupiter
  11. 19. This has the smallest wave length on the EM-spectrum
  12. 20. Astronomer who discovered infrared