Vocabulary review Unit 5

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Across
  1. 3. done before the usual or expected time
  2. 4. a body's relative mass or the quantity of matter
  3. 7. move with a smooth continuous motion
  4. 9. fly or rise high in the air.
  5. 10. extent across the wings of an aircraft
Down
  1. 1. a hole or empty space inside
  2. 2. the action or process of flying
  3. 5. from a simple to a more complex form.
  4. 6. the action or process of adapting
  5. 8. of a bird) move (its wings) up and down