Fourth Grade Science Test #2

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Across
  1. 3. in a collision, sound can be an example of this type of energy
  2. 4. the moon has less gravity than the earth because it is this
  3. 7. a property of matter that makes it resist a change in motion, a property of matter that makes it resist a change in motion
  4. 8. the part of a lever which holds and balances weight
  5. 10. has more mass than a car
  6. 13. two objects bumping into each other
  7. 14. acts like a giant electromagnet
  8. 15. which has more inertia, a dog or horse?
  9. 18. this energy includes an object's mass, speed, and direction
  10. 19. the movement resulting from force
  11. 22. machine that can help overcome friction
  12. 23. in a collision can cause the speed of an object to change because this happens to the energy
  13. 24. theses forces do work or allow work to be done, an example includes a person pushing a lawnmower
  14. 25. an object in motion will stay in this unless acted upon by an unbalanced force
  15. 28. discovered the laws of motion
  16. 29. gives a building its shape
Down
  1. 1. these forces prevent work from being done, a chair resting on the floor is an example
  2. 2. the push or pull on an object to move it
  3. 5. things like wax, can be used to minimize friction
  4. 6. most stable shape because of a low center of gravity
  5. 9. has a magnetic field because of its polarity
  6. 11. a machine designed to overcome weight and make lifting easier
  7. 12. can generate gravity
  8. 16. a type of inclined plane
  9. 17. opposites of this on a magnet attract
  10. 20. the amount of matter an object has
  11. 21. increases with a rough surface
  12. 26. a device that makes work easier
  13. 27. this has less mass than an elephant
  14. 29. base of a building