Year 9 Physics

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Across
  1. 4. describes a material that gives off radiation
  2. 7. used to see inside the body
  3. 10. a body orbiting a star other than the Sun
  4. 11. needed to receive radio waves
  5. 14. earth at the centre
  6. 15. a structure containing billions of stars
  7. 16. sun at the centre
  8. 17. when a planet appears to move backwards
Down
  1. 1. produces a current when it moves in a coil of wire
  2. 2. scientist who observed the moons of Jupiter
  3. 3. the earth's only natural satellite
  4. 5. name of the most famous space mission
  5. 6. orbits every 24 hours
  6. 8. detects changes in temperature
  7. 9. waves of radiation
  8. 12. everything we can observe
  9. 13. sends out radio waves