This is the dead plant and animal material in soil.
What is humus?
100
How does soil form?
Soil forms by rocks being broken into small pieces by weathering and the pieces of rock mix with dead plant and animal material (humus).
100
_____________ weathering is breaking down rocks which include wind, water, sun, ice and temperature changes. Physical weathering does not change the chemical composition of the rock or minerals.
What is physical weathering?
100
Give an example of erosion:
Water carries pieces of rock away from a mountain.
200
Three different properties that best describe soil.
What are texture, amount of humus, size of rock particles, kinds of earth materials, and ability to retain water?
200
Any nonliving natural resource that makes up Earth, including soil and water.
What is earth material?
200
Pieces of rock being moved by water or wind is an example of: erosion, deposition, or weathering.
What is erosion?
200
Give an example of deposition:
Pieces of rock are carried by a stream and settle further down the mountain.
300
After erosion, this is what happens to the materials when they stop moving.
What is deposition?
300
This happens when soil is taken from one place and deposited to a new place.
What is erosion and deposition?
300
A crack in a rock fills with water and freezes is an example of: weathering, erosion, deposition.
What is weathering?
300
What was the difference between the two stream tables we used in our investigations?
One stream table was standard and the other was flooded.
400
How are physical and chemical weathering different and the same?
Different: Chemical weathering produces new materials, physical does not.
Same: They both break rocks into smaller pieces.
400
Matter that settles to the bottom of a liquid.
What is sediment?
400
_____________ weathering happens when minerals in rocks are changed by chemicals in water and air. Example: Acid rain. The starting minerals change into new substances.
What is chemical weathering?
400
What is the purpose of using a stream table?
We used stream tables to simulate natural landforms. The stream table is a model, a small representation of something larger.
500
Soil is made of these materials:
What are pebbles, sand, gravel, clay, air, and water and humus?
500
Misc: The process in which two or more substances combine to make one or more new substances that have.
What is a chemical reaction?
500
This causes small pieces of rock to break off at the side of a mountain.
What is physical weathering? (wind and water)
500
A type of weathering is water. Water does this when it freezes, causing rocks to crack into smaller pieces: