An organism that breaks down dead organisms. Fungi and Bacteria.
100
What is plant growth?
When roots of plants grow into a crack in a rock and break it apart. (Mechanical)
100
The movement of rock particles by wind, water, ice or gravity is called:
What is erosion.
200
How do animals cause weathering?
Animal Actions - They break apart soil as they burrow.
200
The loose weathered material on Earth's surface is called...
soil.
200
True or False: George Washington Carver taught farmers ways of soil conservation in the South in early 1930s.
True
200
Acid Rain
Chemical
200
What is found below the C-Horizon?
Bedrock.
300
What is weathering?
The process that breaks down rocks and other materials at Earth's surface.
300
Briefly describe the A-horizon.
Also known as topsoil, this horizon contains dark, crumbly soil with much humus.
300
The soil loss that occurred on the Great Plains in the 1930s was called the:
Dust Bowl
300
Abrasion
Mechanical
300
As plants shed leaves they form a loose layer called ...
Litter.
400
What is abrasion?
The grinding away of rock particles by other rock particles carried by wind, water, or ice.
400
Which soil horizon forms last and why?
The B-Horizon forms last because it is formed when humus and other materials wash down from the A-Horizon.
400
Give an example as to why soil is so valuable.
Answers will vary
400
What is the gas that causes iron to oxidize called?
Oxygen - (Chemical)
400
If a rock is said to be permeable, what does that mean?
The rock contains air spaces that allow water to seep through it and weather it more quickly.
500
The rate of weathering for a rock depends on the:
Climate and type of rock
500
True or False: Humus is the best type of soil for growing plants.
False - Loam is.
500
Describe what occurs in contour plowing.
Farmers plow the fields along the curves of a slope.
500
When water seeps into a crack in a rock and freezes there overnight causing the rock to break apart it is called:
Ice Wedging or Freezing and Thawing (Mechanical)
500
Explain the uses of plant roots. Hint: looking for 3 answers. One has to do with mechanical weathering, one has to do with chemical weathering, and one has to do with soil conservation.
Plant Growth, Living Organisms, and preventing erosion.