Unit 1 Sec. D Summary HW 4

7/10/14

13) Steel

14) An example of a well-defined compound is Ni₃Al, which is a low-density, strong metallic alloy of nickel and aluminum.

15) Sustainability is present-day activities that preserve the ability of future generations to meet their resource needs.

16) a. Reusing is using the same product again and recycling is when an item is gathered for reprocessing.

b. Reusing examples: wearing clothes more than once and reusing a textbook

    Recycling example: recycling water bottles and recycling paper

17) a. Renewable resources examples: lumber, corn, solar energy, and wind power

b. Nonrenewable resources examples: fossil fuel, gas, nuclear, and oil

18) a. Reusing

b. Recycling

c. Reusing

19) A light bulb is glass so it must get melting to form a new product and newspapers must get shredded so it can be forming into a new product.

20) A scientific law is a statement that is always true and a law enacted by a government can be broken.