The fascinanting fantastic forces crossword

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Across
  1. 5. A rocket wouldn´t do much with out this force.
  2. 6. You mesure mass in this unit.
  3. 8. This force is the contrary of push.
  4. 9. This is a thousand grams.
  5. 10. This is a force that happens when to surfaces are rubbing together it causes heat and wearing.
  6. 11. This is what you mesure weight in (it was named after a famous scientist who discovered gravity).
  7. 13. This hasn´t got any thing to do with forces and it is a big rellow rubbery animal toy you use in the bath.
  8. 14. This is a force that will help you ...... a trolley or when your angry you could hurt them by ....... them.
Down
  1. 1. This force pulls us towards the centre of the earth.
  2. 2. This is when air particales pushing againt a moving object( this is two words).
  3. 3. This is a propertie of some objects which prevents air resistance (it is in past tense).
  4. 4. You mesure weight with this gadget.
  5. 7. This means how much matter we have inside us and dosn't change if you go to a different planet.
  6. 8. This is a object that has gravity that pulls us to the cetre of itand Earth is one of them.
  7. 12. This is the amount of gravity that there is pulling you to the cetre of the earth (the bigger the more there is) This force will change due to the size of the planet/star your on