Fourth Grade Science Test #1

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Across
  1. 2. measure of a wave's strength
  2. 5. not letting light through
  3. 7. loud sound has this
  4. 10. stored energy; examples include coal, battery
  5. 11. negative part of an atom
  6. 12. A buildup of charges on an object.
  7. 15. giving off light
  8. 16. form of energy that is released when an object vibrates
  9. 18. A dark area from which light is blocked.
  10. 19. red, orange, yellow, green, blue, violet
  11. 20. examples of this type of energy include flowing river, sound, light, boiling water, closed electrical circuit
  12. 22. the ability to do work
  13. 25. process of changing one form of energy to another, important to all life, happens through chemosynthesis and photosynthesis
  14. 26. The bouncing back of light when it hits a surface through which it cannot pass.
  15. 28. material that cannot easily transfer energy
Down
  1. 1. measured from one crest of a wave to another
  2. 3. flow of electrons along a path
  3. 4. the loudness or softness of sound
  4. 6. highest point of a wave
  5. 8. the highness or lowness of a sound
  6. 9. all matter is made of these particles
  7. 13. Allowing light to pass through, scatters it
  8. 14. material that can easily transfer energy
  9. 17. particles that make up all matter, smaller than a molecule
  10. 21. material that transmits light
  11. 23. machine which converts mechanical energy into electrical energy
  12. 24. The bending of a wave as it passes at an angle from one medium to another
  13. 27. a complete circuit through which electricity flows