ROCKS AND SOILS QUIZ

What 2 things is soil made up of?

• Minerals and clay

• Organic matter and slit

• Rocks and organic matter

• Sand and clay

What is decayed material in soil called?

• Loam

• Peat

• subsoil

• Humus

What do you call a type of soil that contains an equal amount of all of the components above making it the “ideal” soil?

• Sandy silt

• Silty clay

• Loam

• Silt

What is a soil horizon?

• A factor influencing how soil is formed

• A layer of soil

• An organism found within the soil

• A technique used to map soils

What are the three main layers that form the soil profile?

• Minerals, organic matter, and living organisms

• Topsoil, subsoil, and parent material

• Clay, silt, and sand

• Air, water, and soil

Why is humus an important part of soil?

• It can break down organic pollutants

• It converts nitrogen to nitrates used by plants

• It helps to improve water filtration

• It's rich in nutrients, which is important for fertility

Which type of soil contains humus?

• Bedrock

• Subsoil

• Topsoil

• All soils contain humus

Soil is composed mainly of what ingredients?

• water, air, sand, mud, shells

• worms, minerals, shells, air, rock pieces

• air, rock pieces, decayed organic matter, water, minerals

• rock pieces, mud, decayed organic matter, minerals, worms

Darker color soil tends to be more fertile than lighter color soil.

• True

• False

 _______ is the type of soil used most often with plants and on farms. It is a mixture of clay, sand, and silt.

• Loam

• Humus

• Sand

• Soil