convection currents

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Across
  1. 1. Second layer of earth and take 2/3 of the earth
  2. 4. convection ________
  3. 5. opposite of outer core
  4. 6. ____ air sinks
  5. 8. First physical layer of earth
Down
  1. 2. second layer of physical earth
  2. 3. has 2 half's inner and outer
  3. 4. warm air rises and cool are sinks
  4. 6. first mechanical layer of earth
  5. 7. ____ air rises