Space and Forces Revision

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Across
  1. 2. The opposite of South
  2. 4. A force between opposite poles
  3. 7. Equal to the mass (kg) x gravitational field strength (Nm) on Earth
  4. 12. The planet with many rings
  5. 13. When the speed of an object increases
  6. 14. Another things which changes when a force acts on an object
  7. 15. An object which orbits a star
  8. 17. The upward force in floating and submerged objects
  9. 18. Our home planet
  10. 21. Equal to mass (g) divided by volume (cm3)
  11. 22. The third planet from the Sun
Down
  1. 1. The opposite of negative
  2. 3. A force between opposite charges
  3. 5. A contact force when two surfaces rub against each other
  4. 6. The closest planet to the Sun
  5. 8. When forces in opposite directions are equal
  6. 9. The largest planet in the solar system
  7. 10. A minor planet
  8. 11. An object which orbits a planet
  9. 16. A non-contact force which is always attractive
  10. 19. The scientist who discovered that the extension of a spring is proportional the force applied to it
  11. 20. The planet with an atmosphere of sulphuric acid