Soil Formation

Waves dropping sand on the beach is called?

• Weathering
• Erosion
• Deposition
• Movement

Weathering and erosion are the same thing.

• True
• False

Which layer of soil are these roots growing in?

• subsoil
• topsoil

What is the name of a soil that is:
30% Sand
10% Silt
60% Clay

• Clay
• Silt loam
• sand
• Sandy loam

Which of the following orders sediment particle size from smallest to largest?

• silt, sand, clay
• sand, silt, clay
• clay, sand, silt
• clay, silt, sand

Soil formation begins with the weathering of_______.

• Humus
• Subsoil
• Litter
• Rock

What is the movement of soil from one place to another?

• weathering
• deposition
• discharge
• erosion

Humus is.....

• the dead parts of plants and animals in soil.
• A food we eat with pretzels.
• The tiny particles inside of soil
• The roots that come off of a plant and live in soil.

Which of the following describes how microorganisms influence the chemical characteristics of soil?

• They loosen and mix the soil by digging burrows underground.

• They add inorganic material to the soil by weathering rocks on Earth’s surface.

• They add moisture to the soil by creating pores through which water can move.

• They add organic material to the soil by breaking down the remains of plants and animals.

Weathering occurs fastest in

• cold, dry climates
• cold, wet climates
• hot, dry climates
• hot, wet climates