Weathering pt. I
The process of rock changing from one type to another is called what?
The rock cycle
The process of breaking down rocks is called _______.
weathering
decayed organic material found in soil
humus
The sediment that a stream carries
a load
Primary force behind erosion
gravity
______ occurs whenever rocks rub against each other.
Abrasion
Breaks rocks into smaller and smaller pieces
Mechanical weathering
What are the layers of soil called
horizons
a pile of rocks and soil deposited by a glacier
moraine
the dropping of sediment and rocks in a new location
deposition
Changed rocks into a new substance
Chemical weathering
What forms when carbon dioxide and water mix?
Carbonic acid
The largest kind if particle in soil
Sand
A fertile soil that has equal parts of sand and silt, combined with about half as much clay is called ______?
Loam
A rockslide is an example of ______ that is caused by gravity.
erosion
What is the difference between Mechanical and Chemical weathering
in Chemical weathering, the chemical makeup of the rock is changed, while mechanical weathering changes only the size and shape the rock
The three categories scientists classify rocks
sedimentary, igneous, and metamorphic
small particles of weathered rocks and minerals
sediment
What contains weathered minerals and some nutrients from the humus?
Subsoil
the area of sediment deposited at the mouth of a river
delta
Four kinds of Mechanical weathering
frost heaving
frost wedging
pressure release
abrasion
exfoliation
Four kinds of Chemical weathering
acid rain
carbonic acid
lichens and mosses
oxidation
The amount of each kind of particle in a soil sample
Texture
Unweathered rock that influences the soil above it is called _________.
Bedrock
the process of wind picking up loose sediment and carrying it away
deflation