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In this lesson, we will learn how to recognize that soil is made from rocks and organic matter.
Pick the sentence that tells us what soil is made from.
What is humus?
Why is humus an important part of soil?
Desert soil is sandy and does not contain much humus.
Sand does not hold water very well and this affects the types of plants that can grow there.
Which of the plants listed is especially adapted to grow in sandy soil?
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