All About Soil

Soil is...

• the perfect mixture of sand, silt and clay.

• a mixture of sand, silt, clay, air, water, and organic material.

• decayed organic matter

Tags

NGSS.MS-LS1-5

What is loam?

• Soil that is the perfect mix of sand, silt and clay in which most plants would grow very well.

• the bottom layer of soil.

• The size of particles in soil.

• The furthest layer down in the soil where plant roots can grow.

(a)   is the bottom layer of the soil horizons.

The bottom layer of the soil horizons is called_____________.

• humus

• subsoil

• bedrock

Which layer is topsoil?

• Horizon A

• Horizon B

• Horizon C

• Horizon O

Which soil horizon layer is subsoil?

• Horizon A

• Horizon B

• Horizon C

• Horizon O

Which list below has soil components listed in size from largest to smallest?

• clay-silt-sand

• silt-sand-clay

• sand-silt-clay

• sand-clay-silt

The texture of soil depends mainly on the size of its ______________.

• particles

• rocks

• dirt

• plant roots

What is a soil profile?

• A section of soil that shows all of its layers.

• The color of a soil.

• The texture of a soil.

• The size of the particles in a soil.

Which layer in the soil profile contains humus?

• bedrock

• subsoil

• topsoil

• horizon