4th Grade Science

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Across
  1. 4. how often the particles of air in a sound wave vibrate back and forth
  2. 5. what an animal does in response to a stimulus
  3. 6. a vertebrate that lives in water when its young and on land as an adult
  4. 9. seeds from cones grow into adult trees
  5. 10. a vertebrate that feeds its young with milk
  6. 12. vertebrates hatch from eggs and have wings
  7. 13. energy in a form that you can hear
  8. 14. how high or low a sound is
  9. 15. to make new organisms
  10. 18. a change in an objects position
  11. 19. an object that attracts certain metals
Down
  1. 1. the new organisms that form when living things reproduce
  2. 2. weathering of the land due to things like acid rain, or gases in the air
  3. 3. an objects location
  4. 6. an invertebrate that has jointed legs and a hard exoskeleton
  5. 7. an animal that has no backbone
  6. 8. electricity a buildup of positive or negative electric charges on an object
  7. 11. plant seeds from fruits/flowers grow into adult trees
  8. 16. a vertebrate that has a thick skin covered with dry scales
  9. 17. hold a plant in place suck up water through the soil