Question

label a soil profile from top to bottom using a, b, c, and bedrock and give one trait for each.
your answer

what is the process by which rocks are broken down by physical forces without changing their chemical composition?
chemical weathering
mechanical weathering
erosion
deposition

which layer of soil is composed primarily of partially weathered parent material?
a horizon
b horizon
c horizon
o horizon

Explanation:

• For the second question: Mechanical weathering breaks rocks physically without chemical change. Chemical weathering changes chemical composition. Erosion is movement of sediments. Deposition is sediment settling.
• For the third question: C horizon has partially - weathered parent material. A horizon is top - soil (organic - rich). B horizon has clay and minerals from A. O horizon is organic matter (leaves etc.).

Answer:

• Second question: B. Mechanical weathering
• Third question: C. C horizon