Soil Assessment Noel Pd 2

40 Questions | By Ysmsscience8 | Updated: Mar 21, 2022 | Attempts: 208

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1.

Soil is a mixture of weathered rock, mineral fragments, water, air and _____.
- A.
  
  Sand
- B.
  
  Decayed organic matter
- C.
  
  Moss
- D.
  
  Clay
2.

The layer of soil that contains the most organic material is called the _____ horizon.
- A.
  
  A
- B.
  
  B
- C.
  
  C
3.

All of the following cause mechanical weathering EXCEPT _____.
- A.
  
  Ice
- B.
  
  Tree roots
- C.
  
  Burrowing animals
- D.
  
  Carbonic acid
4.

Litter often covers the _____ horizon.
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  All of the above
5.

Chemical weathering is more rapid in a _____ climate.
- A.
  
  Warm, dry
- B.
  
  Warm, wet
- C.
  
  Cold, dry
- D.
  
  Cold, wet
6.

Mechanical weathering is more rapid in a _____ climate.
- A.
  
  Dry
- B.
  
  Hot
- C.
  
  Cold
- D.
  
  Humid
7.

Soil erosion can be slowed by _____.
- A.
  
  No-till farming
- B.
  
  Cutting trees from the middle of fields
- C.
  
  Plowing at least three times a year
- D.
  
  Farming on steeper slopes
8.

The organic matter in humus is made of _____.
- A.
  
  Dead/decaying animals and insects
- B.
  
  Leaves
- C.
  
  Sticks/branches
- D.
  
  All of the above
9.

The rate of weathering depends upon the area's _____.
- A.
  
  Oxygen
- B.
  
  Climate
- C.
  
  Water
- D.
  
  Soil
10.

The rock and mineral fragments in soil come from rock that has been _____.
- A.
  
  Blasted
- B.
  
  Carved
- C.
  
  Weathered
- D.
  
  Chemically treated
11.

On steep slopes and mountains, __________________ helps reduce erosion by creating level topped areas so crops can be grown.
- A.
  
  A shelter belt
- B.
  
  Strip cropping
- C.
  
  Mulching
- D.
  
  Terracing
12.

Soils in _________ contain little organic material are are thinner making it very hard to grow crops.
- A.
  
  Tropical areas
- B.
  
  Deserts
- C.
  
  Prairies
- D.
  
  Temperate forests
13.

Plants cannot grow without _____.
- A.
  
  Rocks
- B.
  
  Soil
- C.
  
  Moss
- D.
  
  Pesticides
14.

__________ regions are especially vulnerable to erosion because once cleared, there is very little ground cover.
- A.
  
  Desert
- B.
  
  Tropical
- C.
  
  Mountain
- D.
  
  Prairie
15.

The mass of clay, silt, sand, and boulders that covers much of the United States was deposited by _____.
- A.
  
  Farming
- B.
  
  Glaciers
- C.
  
  Ice wedging
- D.
  
  Huge bulldozers
16.

Ice wedging is brought about by _____.
- A.
  
  Carbonic acid freezing on rocks
- B.
  
  Water and oxygen reacting
- C.
  
  Water freezing and thawing
- D.
  
  Rocks colliding with each other
17.

Minerals found in the B horizon were dissolved in water and carried there by a process called _____.
- A.
  
  Oxidation
- B.
  
  Leaching
- C.
  
  Weathering
- D.
  
  Littering
18.

Oxidation occurs when some materials are exposed to _________.
- A.
  
  Oxygen and water
- B.
  
  Carbonic acid
- C.
  
  Kaolinite
- D.
  
  All of the above
19.

The B horizon is _____.
- A.
  
  Rockier than the C horizon
- B.
  
  Richer in humus than the A horizon
- C.
  
  Lighter in color than the A horizon
- D.
  
  Thinner than the C horizon
20.

Plants don't grow as well when _____ has been lost.
- A.
  
  Clay
- B.
  
  Topsoil
- C.
  
  Parent rock
- D.
  
  Slope
21.

_____ is a factor that affects soil development.
- A.
  
  Time
- B.
  
  Slope
- C.
  
  Type of rock
- D.
  
  All of the above
22.

The _____ horizon has smaller rock and mineral particles than the other layers.
- A.
  
  A
- B.
  
  B
- C.
  
  C
23.

Below the C horizon is _____.
- A.
  
  Topsil
- B.
  
  Rock (parent material)
- C.
  
  Clay
- D.
  
  Humus
24.

Mechanical weathering _____.
- A.
  
  Breaks apart rocks by physical processes
- B.
  
  Occurs when chemical reactions dissolve of change the minerals in rocks
- C.
  
  Occurs when iron is exposed to oxygen and water
- D.
  
  None of the above
25.

Chemical weathering _____.
- A.
  
  Is caused by freezing and thawing
- B.
  
  Breaks apart rocks by physical processes
- C.
  
  Occurs when chemical reactions dissolve or change the minerals in rocks
- D.
  
  None of the above