¹     Soil is an important natural resource. It is made from broken up pieces of rock and dead leaves, tree limbs, and dead bugs. Weather helps make soil. Rocks get bigger when the weather is hot. They get smaller when the weather is cold. This process can make rocks break into smaller pieces. When they get small enough, they turn into soil. Rain and ice also help break rock into smaller pieces. Soil has different layers. The layers are named O, A, B, and C. The O layer is the top layer. It is where the dead leaves and bugs break down. The A layer has roots, worms, and other very small living things. The B layer is very hard. Not much lives in the B layer. The C layer is the bottom .....
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