Soil Horizons

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

What is the layer of soil just below the topsoil?

• soil

• subsoil

• topsoil

• terrace farming

Decayed organic material in soil is called______.

• Litter

• Silt

• Humus

• Clay

What is soil?

• A mixture of minerals

• A mixture of water, minerals, gases and organic matter

• A type of rock

• A type of bacteria

What does weathering mean?

• To form or create new

• To build up

• To break down

• To completely destroy

Which horizon is made up of partially weathered rocks?

• Horizon A

• Horizon B

• Horizon C

• Horizon D or R