Physics unit 1

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