Soil Formation

Which of the following shows where soil formation happens at a faster rate?

• Cold, dry climate
• Steep Slopes
• Valleys and Flat Areas
• Few animals and plants are present

Soil formation begins with the weathering of_______.

• Humus
• Subsoil
• Litter
• Rock

Humus is.....

• the dead parts of plants and animals in soil.
• A food we eat with pretzels.
• The tiny particles inside of soil
• The roots that come off of a plant and live in soil.

What is soil composed of?

• weathered rock
• minerals
• living things
• all of the above

Which type of climate will cause the slowest weathering and soil formation?

• humid and hot
• dry and cold
• moderate temperature
• cold and wet

What is another name for horizon A in a soil profile?

• litter
• subsoil
• bedrock
• topsoil

What is another name for horizon B in a soil profile?

• litter
• topsoil
• subsoil
• bedrock

Earthworms, moles and other animals help soil formation by:

• Breaking rock down
• Mixing and loosening soil by burrowing 
• Draining the water from soil
• Eating soil

Layers of soil are also known as:

• Soil Profiles
• Soil Horizons
• Soil sheets
• Soil cores

How long does it take soil to form?

• ten years

• one hundred thousand years

• one hundred years.

• hundreds to thousands of years