Soil

Match it! Select the correct answer from the pull down...Good luck!

____ _____ develop as each layer of soil becomes progressively altered

More rain yields greater chemical reactions to weather minerals and rocks o Increased rainfall increases the amount of rock that is dissolved because as materials are carried away new surfaces are exposed, which increases the rate of weathering o Inc

Soil types are determined by their percentages of sand, silt, and clay. o The percentages of sand, silt, and clay correspond to the type of soil in the diagram below

The decayed remains of plant and animal life are called ______, which is an extremely important part of the soil.

Called the A-horizon, the _____ is usually the darkest layer of the soil because it has the highest proportion of organic material.

The _______ is a layer of partially altered bedrock. There is some evidence of weathering in this layer, but pieces of the original rock are seen and can be identified.

About half of most soils are __________, such as the products of weathered rock, pebbles, sand, silt, and clay particles.

Climate, Rock Types, Slope, Time, Biological Activity