Characteristics of Soil

Physically breaking down rocks and materials is called__________weathering.

• Chemical
• Mechanical
• Biological
• Permeable

A rock containing iron is soft, crumbly, reddish in color. It's been chemically weathered by__.

• Carbon Dioxide
• Oxygen
• Nitrogen
• Sulfer

Soil formation begins with the weathering of_______.

• Humas
• Subsoil
• Litter
• Rock

The MAIN  thing Decomposers do for the the soil is the following:

• Store moisture
• Burrow deep in the soil
• Make space for air and water
• Break down and digest dead organisms

Decayed organic material in soil is called______.

• Litter
• Silt
• Humus
• Clay

The movement of rocks and weathered materials is called_________.

• Chemistry
• Physical
• Weathering
• Erosion

Topsoil which contains the HUMUS is the soil layer best for growing plants.

• True
• False

There is an unlimited supply of fertile soil.

• True
• False

Which of the following is NOT one of the three types of soil?

• clay
• sand
• silt
• mud

_______ is the type of soil used most often with plants and on farms. It is a mixture of clay, sand, and silt.

• loam
• humus
• soil
• dirt