Chapter 8 Using Resources Wisely

2. Can be as simple as rinsing a plastic cup and using it again.
4. means to use less material.
6. A resource that is easily replaced or that can be used over and over again is a __________.
10. Renewable resources that are used to produce energy are called___________.
11. Things from the natural world that people need to stay alive or find useful are called_______.
13. The soil that forms from the bedrock benaeth.
14. Is recovering a resource from one item and using that resource to make another item.
15. Hydroelectric power plants use ___________ to generate electricity.
17. Come from the remains of ancient plants and animals_________.
18. Is a place where trash is deposited and then covered with plastic or clay.
19. All of the soil horizons together are called a _______.
20. Horizon B is the ________ which usually contains very little humus.

1. Natural resources that are used to produce energy.
3. Anatural resource that is not easily replaced is __________.
5. Carbon dioxide a gas formed when fossil fuels are burned may cause ________.
7. The efficient use of resources is called__________.
8. Soil that has been carried from some other location by wind and water is called _________.
9. Decayed organic material carried by rainwater into developing soil is known as __________.
12. Over time soil develops definite layers called _______.
16. Horizon A is _______ which contains humus, minerals, and rock fragments, as well as insects and earthworms.
20. A natural resource made up of minerals and small rocks, water, gases, and organic matter.