The Greenhouse Effect

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Across
  1. 4. It keeps the Earth's surface warm.
  2. 5. It is the transfer of thermal energy by collisions between particles of matter.
  3. 6. Transfer of energy by electromagnetic waves.
  4. 7. The transfer of thermal energy by the movement of particles within matter.
  5. 8. It is emitted from the Earth's surface.
Down
  1. 1. Actions carried out by humans.
  2. 2. It absorbs infrared radiation from the Sun.
  3. 3. To return light, heat, or sound, after it strikes a surface.