3 rd grade soil unit mrs. thornburgs picture vocabulary

33rdrd Grade Soil Unit Grade Soil Unit

Mrs. Thornburg’s Picture VocabularyMrs. Thornburg’s Picture Vocabulary

What do we call the loose material in which plants grow in the upper layer of the Earth?

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Soil

What do we call the part of the soil made up of the decayed parts of once-living things?

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Humus

What do we call a rich type of topsoil with lots of humus?

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Loam

What do we call a type of soil with very small grains that trap a lot of water?

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Clay

What do we call solid rock under soil?

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Bedrock

What do we call the layer under the topsoil?

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Subsoil

What do we call the top layer of soil? It is made up of the smallest grains, has the most humus and is

the richest layer of soil (most nutrients).

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Topsoil

Label the layers of earth.

1.

2.

3.

4.

1. ___________________

2. ___________________

3. ___________________

4. ___________________

Label the layers of earth.

1.

2.

3.

4.

1. Humus

2. Topsoil

3. Subsoil

4. Bedrock