Soil

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Summary

We investigate Earth to find out how it works. Find out about Earth's living and nonliving features in the Investigating Earth series!

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Investigating Earth	p. 4
Soil	p. 5
What Is Soil?	p. 6
What Is Soil Made Of?	p. 8
Different Types of Soil	p. 10
Sandy Soil	p. 12
Clay Soil	p. 13
Loam	p. 14
Earth's Soil Cycle	p. 16
Why Is Soil Important?	p. 18
Soil Helps Plants Grow	p. 20
Soil Holds Roots and Seeds	p. 22
Soil Cleans Up Natural Waste	p. 24
Soil Helps Animals Survive	p. 26
Protecting Soil	p. 28
Amazing Soil	p. 30
Glossary	p. 31
Index	p. 32
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