Energy

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Across
  1. 3. _____ are formed when light is blocked by opaque objects.
  2. 4. the main source of heat and light energy on Earth
  3. 5. A form of energy that warms things.
  4. 6. A form of energy that are mostly used in electrical appliances.
  5. 9. Light travels in a _____ line.
  6. 11. _____ objects allow all light to pass through.
  7. 12. _____ objects do not allow light to pass through.
  8. 13. _____ is not a source of light because it only reflects the sunlight.
Down
  1. 1. _____ is another word to say poor conductors of heat or electricity.
  2. 2. A form of of energy that a moving object has.
  3. 4. A form of energy that is stored and used later.
  4. 7. Metals are good _____ of heat and electricity.
  5. 8. A form of energy that helps us see things.
  6. 9. Translucent objects allow _____ light to pass through.
  7. 10. A form of energy that we can hear.