Soil

Which of the following is the largest particle in soil?

• sand
• silt
• humus
• clay

Which of the following best describes soil erosion?

• A.  the breakdown of soil 
• A.  the improvement of soil
• A.  the addition of soil
• A.  the movement of soil by wind or water

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Which layer of soil are these roots growing in?

• subsoil
• topsoil

How would you describe the texture of "sandy" soil?

• sticky
• gritty
• smooth
• slimy

Where does most of the water go when it rains?

• in the ocean
• in the rivers
• in the gutters
• it absorbs into the soil

The breaking down of rocks into smaller pieces.

• erosion
• weathering
• sediment
• sand

Which is NOT a layer of soil?

• bedrock
• topsoil
• undersoil
• subsoil

The movement of weathered rock and soil

• weathering
• erosion
• sand
• silt

A truck keeps the soil wet at a construction site. Why?

• to keep the soil from blowing away
• to keep the workers cool
• to help new plants grow when they are planted
• it looks better when it is wet