Across
- 7. resource that forms much more slowly than it is consumed.
- 8. the number of times the machine multiplies the input force.
- 9. a fixed point where a bar pivots in a lever.
- 10. a simple machine that is made of a wheel connected to a smaller cylindrical object.
- 11. any device that helps people do work by changing the way work is done.
- 12. a simple machine that has a bar that pivots at a fixed point.
- 14. any natural material that is used by humans.
Down
- 1. natural resources used to generate energy.
- 2. Natural resources that are used to make objects, food, or drink.
- 3. a comparison of a machine’s work output with the work input.
- 4. a simple machine that is a straight, slanted surface.
- 5. a natural resource that can be replaced at the same rate at which it is consumed.
- 6. a simple machine that has a grooved wheel that holds a rope or a cable.
- 13. a nonrenewable resource formed from the buried remains of plants and animals that lived long ago.