natural resources ch 2
Terms
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- What are resources?
- anything NEEDED by human beings to live
- What are nautural resources?
- materials removed from the earth that are needed and used by people
- Give some examples of natural resources
- fossil fuels-oil, coal, natural gas, water, minerals
- What are living resources?
- anything living on the earth that people use.
- Give examples of natural resources
- wood, plants for food, cotton, animals for food
- What are renewable resources?
- resources that are replaced by nature in a reasonable amount of time
- Give some examples of renewable resources
- wood, water, soil, plants, animals
- What are nonrenewable resources?
- any resource that cannot be replaced by nature in a reasonable amount of time.
- What are example of nonrenewable resources
- fossil fuels & minerals
- What are limited resources
- something needed where there is only a certain amount. You might run out.
- Give examples of limited resources
- fossil fuels, minerals
- What are unlimited resources`
- resources that won't run out
- Give examples of unlimited resources
- trees, animals, air, water
- Name three ways to help manage the land
- crop rotation, contour plowing, strip cropping
- What are crops?
- anything grown in mass quantities to eat, use as feed, or sell
- What is depletion?
- when one type of crop is grown on the same field for too long and so the nutrients are gone
- What is crop rotation?
- planting a nitrogen-using crop one year and a nitrogen-producing crop the next year
- What is contour plowing?
- Planting crops across the face of a slope instead of up and down. It prevents soil erosion
- What is strip cropping?
- planting strips of low cover crops between strips of other crops
- what are cover crops
- winter-time crops to hold down the soil. Cover crops help prevent soil erosion
- What is erosion?
- Erosion is when water and wind carry away soil
- what is terracing?
- plowing a slope/hill to put in steps for planting
- what are wind breaks?
- a row of trees to stop the wind from eroding the soil. It helps prevent erosion
- What are minerals?
- a naturally occuring checmical or substance found in soil or rocks.
- Give some examples of minerals
- copper, iron, sulfur
- What are alloys
- substances made of two or more metals
- What are examples of alloys
- steel
- What are the steps in open-pit mining?
- strip the earth (make a hole), take out the ore, purify the ore, fill the hole.
- obtaining and using fossil fuels and nuclear energy can....
- pollute the land