Physical Science

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Across
  1. 1. The force that acts opposite to the direction of motion. Caused by friction and differences in air pressure.
  2. 5. The force caused by two surfaces that come into contact with each other.
  3. 6. The speed of an object in one direction.
Down
  1. 2. A force that is applied to an object.
  2. 3. The force that propels a flying machine in the direction of motion.
  3. 4. The force of gravity. It acts in a downward direction—toward the center of the Earth.
  4. 7. The force that acts at a right angle to the direction of motion through the air.