Forces, planets, and the earth

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Across
  1. 8. A force perpendicular to a surface
  2. 9. A force of attraction between any two objects
  3. 12. For a circuit to work, you need a closed ____
  4. 15. Is the earth pulling on objects in the space station?
  5. 19. The dependent variable is plotted on this axis
  6. 21. The address for the website for this class is _______.trampleasure.net
  7. 22. The planet that is middle-distance from the sun
  8. 24. The variable that you select values to measure at
  9. 25. In the Atlantic Ocean, the oldest rocks are ____ from the mid-oceanic rise
  10. 26. If we model the earth as an egg, this would be the white
  11. 27. A force is an _______ between two objects
  12. 29. If we model the earth as an egg, this would be the yolk
  13. 30. A boundary where plates are spreading apart
  14. 32. Variables that you keep the same for every trial
  15. 34. The unit we use to measure force, e.g. ‘the force is 13.2 ____’
  16. 35. A material that allows for the movement of electricity or heat
  17. 36. When all the forces are added together, we call this the _______ force
  18. 38. A force between two charged objects
  19. 39. For a circuit to work, you need a source of ____
  20. 42. A force that acts against sliding motion
  21. 43. The independent variable is plotted on this axis
  22. 44. In a force diagram, the length of the arrow tells you this about the force
  23. 45. The force when a person pushes or pulls an object
Down
  1. 1. If we model the earth as an egg, this would be the crust
  2. 2. A force in fluids that allows things to float
  3. 3. We often say an object is heavier, when we really mean it has more ____ e.g. metal is not necessarily heavier than feathers
  4. 4. If you add more loops to an electromagnet, it will pick up _____ staples
  5. 5. The mantle makes up the ________ volume of the earth
  6. 6. The crust makes up the ________ volume of the earth
  7. 7. If two balls are identical size, and one is larger, the larger one has a ______ density
  8. 10. The process of warmer things rising and cooler things falling
  9. 11. The word ‘normal’ means ____ in math and physics
  10. 13. When the net force on an object is zero, we say the forces are ______
  11. 14. A material that prevents the movement of electricity or heat
  12. 16. A boundary where plates are moving past each other
  13. 17. If you increase this, non-contact forces will decrease
  14. 18. The property of an object that is associated with gravity
  15. 20. A force from springs or similar materials
  16. 23. Friction force when objects are in touch wit each other but not sliding
  17. 28. Friction force when objects are sliding
  18. 31. The variable that you measure the response in
  19. 32. A boundary where plates are coming together
  20. 33. A measurement of the force of gravity on an object
  21. 37. A force in a rope, chain, wire, etc.
  22. 40. A resistive force in a gas or liquid
  23. 41. A force created by moving charged particles