flock

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Across
  1. 3. its used to research in space
  2. 4. a force that keeps birds in the air
  3. 5. it's a force that makes you fall
  4. 8. its a force that helps things stay on the ground
Down
  1. 1. a man made machine that can fly
  2. 2. to copy nature
  3. 6. a force that is pushing against an object that is moving
  4. 7. an animal that fly’s in nature