Strong and Stable Structures

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Across
  1. 3. the bottom part that supports a structure
  2. 4. able to hold a lot of weight without breaking
  3. 8. what something is made from
  4. 10. the strongest shape
Down
  1. 1. something that has been built or put together
  2. 2. the force that pulls things down to the ground
  3. 5. made by nature, not by people
  4. 6. able to stay standing and not fall over easily
  5. 7. made by people, not found in nature
  6. 9. when weight is spread out evenly so something doesn’t fall