Engineering

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Across
  1. 4. A tool with moving parts that makes work easier to do
  2. 5. The very first test model of a new invention
  3. 7. A drawing or plan you make before you build something
  4. 10. A bar that tilts on a point to help lift heavy things, like a seesaw
  5. 13. A person who designs and builds machines, structures, or systems
  6. 14. A push or a pull on an object
Down
  1. 1. The resistance you feel when you rub two things together
  2. 2. A machine that can be programmed to do tasks all by itself
  3. 3. Round objects that help cars and machines roll smoothly
  4. 6. The strongest shape used by engineers to build sturdy bridges
  5. 8. A wheel with teeth that connects with others to make things turn
  6. 9. A wheel with a rope around it, used to pull heavy things up high
  7. 11. The part of a machine that gives power to cars and airplanes
  8. 12. The power needed to make machines work and move