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

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

Soil

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

Humus

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

Loam

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

Clay

What do we call solid rock under soil? ________________________

Bedrock

What do we call the layer under the topsoil? ___________________________

Subsoil

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). _____________________________

Topsoil

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

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