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Soil
100
Type of soil which contains the largest pieces of minerals.
What is sand?
100
Type of soil which contains medium-sized pieces of minerals.
What is silt?
100
Type of soil that contains the smallest pieces of minerals.
What is clay?
100
An unwanted item or items that can be found in the air, water, or soil.
What is pollution?
100
To pick crops.
What is harvest?
200
The shape of the land.
What is topography?
200
Organisms that break down dead organisms into smaller pieces.
What are decomposers?
200
A mixture of minerals and biotic material found on the outside of our crust which is responsible for all plants to grow.
What is soil?
200
Appearance of soil based on the size of the minerals found within it.
What is soil texture?
200
Method of cutting many different flattened layers into the ground to form a pyramid shape.
What is terracing?
300
When an area of soil becomes very full of salt.
What is salination?
300
Tiny organisms that can be found within the soil; responsible for decomposing biotic material.
What is bacteria?
300
Living or dead organisms.
What are biotic resources?
300
Different layers in the soil which are stacked on top of each other.
What is soil horizon?
300
All of the layers in the soil in a particular area.
What is soil profile?
400
Why is the soil on the side of a mountain so thin?
Erosion carries most of the soil down the side of a mountain very quickly.
400
How do bacteria and plants go through symbiosis?
Some bacteria can "fix nitrogen" in the soil for the plant to use.
400
How can evaporation affect the amount of salt in the land?
When water is evaporated from the ground, the chemicals in the soil are left behind.
400
Why does it take so much time to make soil?
The creation of sediments from weathering take a long time to accomplish. In addition, the changing climate of an area affects the number and amounts of erosion, plants, and animals, all of which affect the formation of soil.
400
Which is larger: a soil horizon or a soil profile?
A soil profile is larger. It is made up of layers of soil horizons.
500
Organism in the soil which decomposes biotic material; much larger than bacteria.
What is fungus?
500
Layer of "dead stuff" that is found inside topsoil which is always decomposing into smaller pieces.
What is humus?
500
The ability of a bacteria to turn the nitrogen gas in the soil into a form that a plant can use.
What is fixing nitrogen?
500
The ability of different kind of organisms to work together in order to survive.
What is symbiosis?
500
Organism (called a "protozoa") which lives inside a thin covering of water around a tiny piece of soil and eats bacteria.
What is amoeba?