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The layer of soil that contains humus is called...
topsoil
The layer in which most plants grow is called...
topsoil
The layer that is made of solid, unweathered rocks under layers of soil is called...
bedrock
Small bits of weathered rock and other material are called...
sediment
Sediment that is deposited at the mouth of the river makes the mouth of the river...
shallower
The moving of bits of weathered material from one place to another is called...
erosion
The dropping of sediment in a new place is called...
deposition
An area of sediment that builds up at the mouth of a river is called...
delta
Soil is made of...
weathered rock, water, air, and humus
Mountains and dunes are two types of...
landforms
Three things that can cause rocks to weather are...
wind, water, and plants.
The three sizes of weathered rock found in soil are...
sand, silt, and clay
Two kinds of sudden erosion caused by gravity are...
landslides and avalanches
occurs when water or wind gradually wears away rock by friction
abrasion
process of water in and around rocks and soil freezing and expanding, breaking up rocks
Frost Weathering
The rapid downhill movement of a large amount of soil and rocks
landslide
