radiation

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Across
  1. 2. the transfer of heat in the form of wave energy
  2. 3. this waves can give you a sunburn
  3. 5. the sun radiates heats _ to the earth and solar system
  4. 6. the distance from crest to crest of the wave
  5. 7. radiates heat outwards toward people
Down
  1. 1. electromagnetic waves that travel through space
  2. 4. the metal heaters that heat up cold buildings
  3. 8. the closer the object is to the heat source the ____ it heats up