Soil

Soil is made of

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

What do we call the layers of soil?

• Deposits
• Horizons
• Minerals
• Rocks

The very top layer of soil is mostly made of

• Solid rock 
• Clay and mineral deposits
• A mixture of minerals and organic material
• Mostly organic material (humus)

Which layer of soil is on the bottom?

• topsoil
• subsoil
• bedrock
• bottomsoil

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

• topsoil
• undersoil
• subsoil
• bedrock

Decayed organic material in soil is called______.

• Litter
• Silt
• Humus
• Clay

What does weathering mean?

• To form or create new
• To build up
• To break down
• To completely destroy

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

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

Which horizon is made up of partially weathered rocks?

• Horizon A
• Horizon B
• Horizon C
• Horizon D or R

There is an unlimited supply of fertile soil.

• True
• False