What is the main organic component of soil?

• Sand

• Clay

• Houmous

• Silt

Tags

NGSS.MS-LS2-3

Which of the following is NOT a role of soil in ecosystems?

• Supporting plant growth

• Filtering water

• Recycling nutrients

• Providing habitats

Tags

NGSS.MS-LS1-5

What is the process of breaking down rocks called?

• Erosion

• Weathering

• Deposition

• Compaction

Which layer of soil is largely composed of houmous and minerals?

• Oh horizon

• A horizon

• B horizon

• C horizon

What factor affects the rate of soil formation based on the slope of the land?

• Parent material

• Topography

• Climate

• Soil organisms

What is the loss of the ability of soil to support plant growth called?

• Weathering

• Erosion

• Compaction

• Degradation

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-5

Which activity can cause soil compaction?

• Tilling

• Grazing livestock

• Walking

• All of the above

What is the main cause of nutrient depletion in soil?

• Loss of topsoil

• Compaction

• Repeated crop growth

• Climate

What is the independent variable in an investigation measuring the effect of climate on soil formation?

• Soil pH

• Nutrient content

• Climate

• Rate of soil formation

Which of the following is NOT a factor that affects the rate of soil formation?

• Parent material

• Topography

• Climate

• Vegetation