Soil Test

Which of the following is NOT one of the three types of soil?

• clay
• sand
• silt
• mud

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

• sand
• silt
• clay
• humus

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

Which type of soil can hold the greatest amount of water?

• sand
• silt
• clay
• loam

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

• weathering 
• erosion

Water gets into the cracks of rock and freezes, causing the rock to break.  What is this an example of?

• erosion
• weathering

Soil is made of

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

What type of rock melts, cools, and hardens?

• Sedimentary
• Metamorphic
• Igneous
• Volcano rock

What is the solid layer of rock beneath the soil called?

• subsoil

• bedrock

• gravel

• horizon B

The size and number of open spaces in soil that let water flow through determine which soil quality?

• pH

• profile

• composition

• permeability