Download Soil Study Guide

Soil Study Guide
The test will be given on _____________.
1. Plants need nutrients from soil to grow.
2. Topsoil is a natural product of subsoil and bedrock. It is rich with a lot of humus. It is
the top layer of soil made up of the smallest grains with the most humus.
3. Soil is formed by broken down rocks, moving water, the air ( wind), and/or decaying
plants and animals.
4. Rocks are made of minerals.
5. Silt is fine particles of soil that are carried along by flowing water and settle at the
bottom of a lake or river.
6. Loam is the best soil for plants to grow in, especially vegetables.
7. Sandy soil has large grains and does not hold water well. It also has few nutrients.
8. Decaying plants and animals are called organic material or humus.
9. Natural resources are naturally occurring (come in nature) and can’t be made by man.
Soil is an example of a natural resource.
10. Saving resources by using them carefully is called conservation.
11. The best soil for growing plants is loam.
12. The layers of soil are topsoil, which contains humus, subsoil, and bedrock.
13. Subsoil is the layer under the topsoil. It has the largest grains and less humus than
topsoil.
14. Bedrock is the solid rock that is under the soil.