Weathering
mechanical and chemical process that change objects on Earth's surface over time
weathering
mechanical weathering that occurs when water freezes in cracks of rocks
What is ice wedging?
The term that refers to the shape and form of the landscape, including steepness.
topography
In which horizon of a soil profile is the parent material usually found?
C horizon (parent material)
A rusty bicycle is an example of which type of weathering process?
chemical
Which of the following can NOT weather rock?
Sunlight, Animals, Freezing/Thawing, Plants
Sunlight
When rocks grind against each other in a river this type of weathering occurs.
abrasion
True or False:
The soil in an area is ALWAYS there as a result of the parent material.
False
In which horizon of a soil profile is the majority of clay found?
B horizon (Subsoil)
This soil type has the smallest particles.
clay
This type of weathering occurs when rocks are broken down by a physical process.
Mechanical weathering
These create holes in soil where water enters and causes weathering
animals
The average weather in an area.
climate
Which horizon beneath humus does not contain any soil.
R horizon (bedrock)
One way parent material forms is from the rock that was originally formed. What is the second way?
Through the process of erosion
Will a higher pH level in soil either increase or decrease the rate of weathering?
decrease
This type of chemical weathering dissolves rock over time.
acid rain or water
The term referring to soil formation as being a constant, but slow process.
Time
Which horizon profile contains plants, bugs, and leaves?
O horizon (humus)
Only a few locations in the U.S. have this type of soil in which makes it very difficult for builders because of how much the soil expands when it absorbs water and contracts when it dries out. What is this soil called?
shrink-swell
The rate of weathering depends on these two factors.
temperature and moisture(precipitation)
When materials containing iron are exposed to water and oxygen, ____________ can occur.
oxidation
All the organisms that live in an area and contribute to soil production.
Biota
In which horizon of a soil profile is the highest proportion of organic material found?
A horizon (topsoil)
What is soil made up of?
minerals, organic material, air, water