Which of the following is an example of a physical change?
1) tarnishing 2)rusting 3) burning 4) melting

Which term is a physical property that describes the amount of matter in an object?
1) mass 2) density 3) volume 4) state of matter

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.