Sci. in the Ancient World Test Review Lessons #84-89

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Across
  1. 3. intrinsic muscles of the foot control _____ movements of the foot
  2. 4. The _____ (heavier or lighter) an object the greater the friction between it and the surface against which it is moving.
  3. 5. the resistance between two surfaces that are moving against each other
  4. 9. When moving an object across the floor you only have to supply a _____ to overcome the friction between the surface and the object.
  5. 12. When you are listening to a person's heartbeat, you are actually hearing the heart's _____ as they open and close.
  6. 14. There are valves in the heart to make sure the blood _____ in a specific pattern.
  7. 15. teeth to cut food
  8. 16. teeth that hold on to a piece of food that needs to be torn apart
  9. 17. Some, but not all, _____ come out of the spinal cord.
  10. 18. Your _____ controls most muscles by sending electrical signals down the spinal cord, through nerves that come out of the spinal cord, and to the muscles.
Down
  1. 1. The _____ cord can be thought of as an _____ of the brain, because it is made of the same material as the brain.
  2. 2. the proper scientific term for baby teeth
  3. 6. muscles that control the hand found in the hand
  4. 7. Extrinsic muscles of the foot are connected to the toes by long, thin _____.
  5. 8. Da Vinci used ball _____ to make it easier for two surfaces to move against one another
  6. 10. teeth to grind food, of which most children only have 2 on each side of the mouth, top and bottom, to start
  7. 11. this is the type of tissue the heart is made of
  8. 13. muscles that control the hand found in the forearm