Soil Quiz

What is the rock or sediment that weathers over time to form the soil called?

• parent material

• topsoil

• subsoil

Temperature and rainfall in particular help determine the speed at which parent material breaks down and the rate at which soil accumulates. This relates to what term?

• topsoil

• climate

• Importance of Conservation

practices meant to protect the soil and its quality for years to come.

• climate

• parent material

• Importance of Conservation

We all can help soil quality by doing all of the following except......

• planting on soil and being careful what we put on it.

• farmers can practice crop rotation

• building more factories

Also called A horizon, rich in decaying organic matter, ideal for growing plants.

• topsoil

• subsoil

• bedrock

Also called B horizon, contains leached materials

• topsoil

• subsoil

• bedrock

Also called R horizon, not a true soil horizon, but instead shows where the bedrock beneath the soil lies.

• topsoil

• subsoil

• bedrock

Tiny pieces of rock, water, air, pieces of dead plants and animals, fungi, and bacteria, and decomposed organic material called humus, all make up what?

• rocks

• grass

• soil

What is the scientific name for soil layers?

• subsoils

• horizons

• profiles

Soil forms when ___________ breaks down bedrock into small pieces.