What Makes Up Soil

What are the main components of soil?

• Small rocks, sand, minerals, and clay

• Water and air only

• Humus and bedrock

• Clay and loam only

What is humus?

• A material that was once living or was formed by a living thing

• A type of mineral found in subsoil

• Solid rock found in bedrock

• A type of sand found in loam

Which layer of soil contains the most humus?

• Topsoil

• Subsoil

• Bedrock

• Loam

What is the main characteristic of subsoil?

• It is made of bigger, lighter colored particles

• It contains a lot of humus

• It is solid rock

• It is very sandy

Why do plants grow well in loam?

• Because it contains clay and sand

• Because it is very thin

• Because it is made of solid rock

• Because it lacks humus

What affects the thickness of soil layers?

• Windy, dry weather and gravity

• The amount of humus

• The presence of bedrock

• The type of minerals

Why do farmers take good care of their soil?

• To use it year after year for growing plants

• To make it thinner

• To remove all humus

• To turn it into bedrock

how many kinds of soil , and what are they?

• sandy, rocky, chalky, silty, and loamy
• three types: topsoil, subsoil, bedrock

• six types: sandy, clay, silt, loamy, peaty, and gravelly
• Five main types of soil: sandy, clay, silt, loamy, and peaty.

Identify the bedrock layer in the image.

what materials made up soil?