Soil

Front

Which of the following is NOT one of the three layers of soil? Options: topsoil, undersoil, subsoil, bedrock

Back

undersoil

Front

Which of the following is NOT one of the three types of soil? Options: clay, sand, silt, mud

Back

mud

Front

_______ is the type of soil used most often with plants. It is a mixture of clay, sand, and silt. Options: loam, humus, mud, dirt

Back

loam

Front

Humus is...

Back

the dead parts of plants and animals in soil.

Front

When there are not enough plants to hold topsoil in place, water and _______ carry the topsoil away, leaving the subsoil exposed.

Back

wind

Front

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called? Options: sand, silt, clay, humus

Back

humus

Front

Which of the following is the largest particle in soil? Options: sand, silt, humus, clay

Back

sand

Front

Why can't many plants grow in sandy soil?

Back

Sandy soil does not hold enough water.

Front

Which layer of soil are these roots growing in?

Back

topsoil

Front

Wind blowing dirt and sand through the air is an example of...

Back

erosion