Summer’s crossword puzzle.

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Across
  1. 2. coping animals.
  2. 3. For every action there is an equal reaction.
  3. 6. Force that moves you forward.
  4. 8. pressure this force can be high or low.
Down
  1. 1. Opposite of the force of weight.
  2. 4. This force changes in space.
  3. 5. On a airplane this force is low.
  4. 7. the design that makes the air flow smoothly.