Structures in the world.

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Across
  1. 2. The force of attraction between all objects.
  2. 3. An internal force that presses or squeezes the particles of an object together.
  3. 5. Shape and physical appearance of a structure.
  4. 6. A hollow structure with a curved shape providing high strength.
  5. 8. Task or purpose of a structure.
  6. 10. A force acting between two parts of a structure.
  7. 11. Made of parts that are put together for a purpose.
Down
  1. 1. A force acting on an object or structure from the outside.
  2. 3. Most structures are ______ structures.
  3. 4. The human _____ is a framework of bones that hold muscles, tendons, and ligaments.
  4. 7. The quantity of matter in an object.
  5. 9. Every force has a strength and a ______.