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