Grade 3: Soils

This type of soil is larger than clay but smaller than sand. It has lots of nutrients.

• silt

• clay

• humus

• sand

This type of soil is composed of weathered rocks and minerals. It does not have a lot of nutrients and does NOT hold water well.

• silt

• clay

• humus

• sand

The loose upper layer of the Earth's surface where plants grow.

• sand

• silt

• humus

• soil

This is the word for how soil takes up or soaks up water.

• reflect

• absorb

• erode

• magnify

A component of soil that has dead animals and plant materials is called...

• clay

• humus

• silt

• sand

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Animals and insects help the soil by...

• breaking down decaying matter

• being beautiful to look at

• making nutrients

• mixing organic matter in the soil

Bacteria, insects, and mushrooms in the soil are called...

• crunchers

• munchers

• decomposers

• humus

Which soil types are in order from LARGEST to SMALLEST rock particle size.

• clay, silt, sand

• sand, clay, silt

• sand, silt, clay

• silt, clay, sand

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Soil is made of...

• weathered rocks and minerals

• air and water

• humus

• concrete

Students wanted to test the capacity of soil to hold on to water. We poured the same amount of water on to each of the soil samples and waited 2 minutes. Based on the results, which of the following is a correct?

• Water seeped through sample A the slowest

• Sample A absorbed the most water

• Water seeped through sample B fastest

• All samples absorbed the same amount of water