3rd Term Day 1

What is the other name for topsoil?

• O Horizon

• A Horizon

• B Horizon

• C Horizon

It is also called the R Horizon.

• humus

• topsoil

• subsoil

• bedrock

It mainly consists of partially broken or weathered rocks.

• topsoil

• subsoil

• bedrock

• parent material

This layer is made up of slightly bigger rock particles and is harder and more compact as compared to the topsoil. Roots of trees are able to reach this layer.

• humus

• topsoil

• subsoil

• parent material

This layer is made up of minerals and decomposed organic matter and it is also very dark in color. It is the layer of soil where plant roots usually grow.

• humus

• topsoil

• subsoil

• bedrock

It is a layer between A and B Horizon.

• O Horizon

• E Horizon

• R Horizon

• L Horizon

The biggest tree roots can reach this layer.

• O Horizon

• A Horizon

• B Horizon

• C Horizon

This is the layer near the water table.

• A Horizon

• B Horizon

• C Horizon

• R Horizon

E horizon is also called _______________________.

• elevated layer

• eluviation layer

• eleven layer

• elicited layer

Soil is a mixture of four main components: air, water, weathered rock, and ________________.

• organic matter

• plastics

• dust

• cement