Soil quiz

Collective name for layers of soil

• Soil profile

• Layers

• Soil erosion

• None of the above

Soil formation begins with the weathering of_______.

• Humas
• Subsoil
• Litter
• Rock

The main function of decomposers is the following:

• Store moisture

• Burrow deep in the soil

• Make space for air and water

• Break down dead organisms

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Which layer of soil is at the bottom?

• topsoil

• subsoil

• bedrock

• bottom soil

Name the layer of soil which is just below topsoil,

• soil

• subsoil

• topsoil

• terrace farming

Which layer of soil are these roots growing in?

• subsoil
• topsoil

Many plants cannot grow in sandy soil. Why is this true?

• Sandy soil does not hold enough water.
• Air cannot pass through sandy soil.
• Roots cannot easily push through sandy soil.
• Sandy soil has too many nutrients.

Which layer of the soil has more humus and fewer weathered rock and mineral particles?

• Organic Material

• Subsoil

• Parent Rock

• Topsoil

Which of the following is the correct order of soil particles from biggest to smallest?

• Clay Silt Sand Gravel

• Gravel Sand Silt Clay

• Gravel Silt Sand Clay

• Silt Clay Gravel Sand