Across
- 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.
Down
- 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.