Human Impact on Soil

Define Agriculture

• A resource that can be replaced after being used through natural or human process.

• A resource that can’t be replaced after being used through natural or human process.

• Production of many diverse types of food or fiber; geography, climate, tradition, and availability of resources.

• Farming

Define conservation

• To use or use up

• To use or manage wisely

• To maintain and reserve for continued survival.

Desertification usually occurs when

• humans leave an area alone to undergo secondary succession
• soil productivity decreases due to drought and poor farming practices
• winds carry large amounts of sand from nearby deserts
• irrigation water is continually used in arid regions of the country

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NGSS.MS-ESS3-4

What was the positive effect of the green revolution?

• excess use of fertilizer
• excess use of pesticides
• profit for small farms
• high yields of grains

Deforestation is particularly harmful in arid regions because it can lead to

• desertification.
• a massive loss of biodiversity.
• loss of jobs.
• a decrease in greenhouse gases.

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What is deforestation?

• Clearing Earth's forests on a massive scale
• Eating too much vegetables
• Going to a forest and pulling weeds
• Clearing the five trees in my backyard

Tags

NGSS.MS-ESS3-4

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what are people doing to counter deforestation?

• the US stopped foreign wood products form entering the country.

• they passes laws to protects endangers wild life therefore protecting the forest they live in

• the US created animal shelters for endangered wild life.

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As part of a study of the effects of urbanization, local scientists have taken many data samples over the course of 20 years. The scientists detected increases in local soil erosion, carbon dioxide levels, and air temperatures. What most likely caused these changes?

• deforestation of woodlands

• decreased water quality

• altered water flow

• erosion of topsoil

Tags

NGSS.MS-ESS3-4

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Which two processes can give rise to soil degradation?

• Erosion

• Decomposition

• Unsustainable agriculture

• Forest Fires

Overgrazing occurs when

• Very few cattle are kept in a large area

• Large numbers of cattle are kept in a area

• Mococulture is used

• Farmers harvest all of the crops at one time

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