land resources

The contamination of earths land, water, or air is called?

• population
• Sustainable yield
• point source
• pollution

Cutting down only some trees in a forest, leaving a mix of trees and species standing is?

• clear cutting
• selective cutting

If all the members of a species disappears from Earth, the species is said to be?

• Threatened
• Endangered
• Extinct
• Keystone species

The loss of a natural habitat is called?

• Habitat development
• biodiversity
• Pollution
• Habitat destruction

Which statement best describes natural resources?

• Natural resources are unevenly distributed around the world.

• Most energy needs are currently met by renewable natural resources

• Natural resources are replaced within a human lifetime. Most energy needs are currently met by renewable natural resources.

• Most natural resources are found below the surface of the earth.

Water is considered a ________ resource

• renewable

• non-renewable

• dirty

• not usable

When water is used to irrigate crops, water is considered an important aspect of ______.

• fishing

• agriculture

• trucking

• business

True or False: People and other living organisms are dependent on the availability of dirty water to survive.

• True

• False

- Respiration 
-Combustion of rocket engine 
-Welding and steel cutting 
are examples of importance of ........

• inert gas 
• nitrogen 
• carbon dioxide 
• oxygen 

- photosynthesis
- production of carbonated drinks 
-Fire extinguisher 
-carbon cycle 
are examples of importance of ... 

• inert gas 
• nitrogen 
• carbon dioxide 
• oxygen