Soil

Soil sample that is 10% clay, 20% silt, and 70% sand has which texture?

• clay

• clay loam

• sandy loam

• silt

The two main factors that determine the rate of weathering are the TYPE of rock and_____.

• Music
• Climate
• Size of rock
• Weight of rock

Soil is made of

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

The layer of soil which the topsoil is found.

• Horizon A
• Horizon B
• Horizon C
• Horizon D or R

According to the settling tube experiment, which soil is the heaviest and fell to the bottom of the tube?

• clay
• humus
• sand
• silt

Soil erosion is the process by which the

• the land surface(top soil) is removed by wind, water or ice

• formation of soil form rocks

• rusting of soil

• None of the above

Which soil component makes up about 5% of a loamy soil?

• Water

• Organic Matter

• Air

• Minerals

Soil is formed by the breaking down of rocks by the action of wind, water and climate. This process is called

• Humification

• Weathering

• Soil erosion

• None of the above

What is a soil problem all farmers face?

• soil hardening
• soil erosion
• soil spoiling
• soil pollution

What type of soil is in our area (North Carolina)?

• Andisoils

• Ultisols

• Gelisols

• Entisols