Research and Design Tech Ed B7/8

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Across
  1. 2. An experimental model that you test
  2. 4. A drawing people use to get a rough idea
  3. 5. Drag cars need to this to decrease drag
  4. 7. a rules for something to make things fair
  5. 8. The opposite pull that slows cars down
  6. 9. a gas that you exhale
Down
  1. 1. An essential thing to use when designing airplanes to make move easily through air
  2. 2. A repeated design that you put on something
  3. 3. A small sum of the big picture
  4. 6. If too much weight is applied on a building beyond its _______, it will collapse