Soils: 1_General Physical Properties of Soil and Soil Formation

Why might a scientist study soils where topography varies but other variables are similar, according to Jenny's model?

• To observe the effect of climate on soil formation

• To isolate the effect of topography on soil formation

• To measure the impact of parent material

• To analyze the influence of organisms

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NGSS.MS-ESS2-1

Which process is responsible for adding organic matter to the soil through the fixation of atmospheric carbon?

• Photosynthesis

• Respiration

• Evaporation

• Transpiration

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NGSS.MS-LS1-6

How does vegetation modify microclimates in soil environments?

• By slowing wind speeds and retaining snow

• By increasing soil acidity

• By reducing soil temperature only

• By increasing soil erosion

Which type of soils are likely to be found in areas where water is ponded on the soil surface for a significant period?

• Gleysolic soils

• Podzolic soils

• Chernozemic soils

• Brunisolic soils

What distinguishes macropores from micropores in soil?

• Macropores are smaller than 0.08 mm in diameter, while micropores are larger.

• Macropores are generally greater than 0.08 mm in diameter, while micropores are smaller.

• Macropores are only found in clay soils, while micropores are found in sandy soils.

• Macropores are filled with nutrients, while micropores are filled with air.

What is one of the central attributes of soils that influences virtually all soil properties and overall health?

• Soil organic matter

• Soil pH

• Soil temperature

• Soil color

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NGSS.MS-LS1-5

According to the text, what is a key function of soil organic matter in the global carbon cycle?

• It serves as a key carbon store

• It increases soil temperature

• It reduces soil erosion

• It prevents water evaporation

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NGSS.HS-ESS2-6

Why is it almost impossible to find a soil property that is not influenced by soil organic matter?

• Because soil organic matter is linked to numerous key physical, chemical, and biological soil properties.

• Because soil organic matter only affects soil color.

• Because soil organic matter is not present in most soils.

• Because soil organic matter only affects soil temperature.

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NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What is one way in which soil organic matter helps buffer water supply in soil?

• By increasing soil temperature

• By increasing water infiltration during rain events

• By reducing soil acidity

• By decreasing plant root growth

Why is soil aggregation considered a strong indicator of healthy soil structure?

• It increases soil temperature

• It reduces stress on root growth and allows for better water infiltration

• It decreases soil nutrient content

• It increases soil acidity

Tags

NGSS.MS-LS2-5