1. Wheels, axles, and pulleys are all forms of simple machines.
2. Simple machines can change the direction and direction of force.
3. A catapult is a kind of lever.
4. A lever is a rigid bar that pivots around a point.
5. Your forearm is an example of a lever.
6. Wheels are attached to a fixed point to make a wheel and axle.
7. A simple machine is a combination of a ramp and a ladder.
8. The force you need to pull something up a ramp is smaller than the force needed to lift it.
9. A spiral staircase functions as a screw.
10. The distance between the threads on a screw is called the pitch.
11. A pulley is a wheel with a groove around it.
12. A pulley makes lifting easier because they spread the work.
13. When using a lever, the more rope you pull, the less force you need.
14. Gears are operated by a lot of force and motion.
15. On a boat, pulleys are used to raise and lower sails.
Parent Tip: Review the logic above to help your child master the concept of bill nye simple machines worksheet.
