1. Mrs. Thornburg’s Picture Vocabulary
3rd Grade Soil Unit
Mrs. Thornburg’s Picture Vocabulary

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

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

6. What do we call a rich type of topsoil with lots of humus?
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7. Loam

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

10. What do we call solid rock under soil?
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11. Bedrock

12. What do we call the layer under the topsoil?
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13. Subsoil

14. What do we call the top layer of soil
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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15. Topsoil

16. Label the layers of earth.
___________________ 1. 2. 3. 4.

17. Label the layers of earth.
Humus
Topsoil
Subsoil
Bedrock 1. 2. 3. 4.