Soils

Which horizon is called the zone of accumulation?

• O
• A
• E
• B

What is weathering?

• Changes in rain patterns over a long period of time
• The movements of air across the Earth's surface that cause rain
• The breaking down of rocks by wind and water
• The movement of rocks and soil by wind and water

Most plants grow best in soil that contains a lot of:

• sand
• bedrock
• humus
• subsoil

What is loam made of?

• Sand and stone
• Bits of rock
• Dead plants and animals
• Humus, sand, silt, and clay

Which type of soil feels smooth when dry and sticky when wet when you rub it between your fingers?

• Sand
• Silt 
• Clay 
• Humus

Which type of soil has the smallest particles?

• Sand 
• Silt 
• Clay 
• Subsoil

Which type of soil has the largest particles?

• Sand 
• Silt 
• Clay 
• Bedrock

Which type of soil drains the fastest?

• silt
• humus
• loam
• sand

Which type of soil drains the slowest?

• silt
• clay
• sand
• loam

A handful of soil has a reddish color and holds a lot of water. It is most likely:

• clay
• loam
• silt
• humus