What type of mechanical weathering occurs when rock is worn away by the grinding action of other rock particles?

What type of weathering breaks down rock by freezing and thawing?

What kind of weathering causes the mineral composition of rocks to change?

What type of climate causes the fastest weathering?

What important factors determine the rate at which weathering takes place?

Soil formation begins with the weathering of exposed __________________.

When soil is high in humus it will have ______________________.

When earthworms add their wastes to the soil, then die and decay in the soil, they are contributing to the formation of what?

How do living organisms help the soil?

What do decomposers do?

Why is soil an important natural resource?

Topsoil erosion is most often caused by these two things ____________________.

What term describes the management of soil to prevent its destruction?

The practice of plowing fields along the curves of a slope is called _______________.

Ice wedging and root wedging are both examples of what type of weathering?

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