Mechanical Weathering
The process of sand, wind, water and other materials. Rub across a rock that causes the rock to wear away over time.
Abrasion
How do living organisms contribute to chemical weathering?
As a plant’s roots grow weak acid is produced which dissolves the rock around the root.
Is soil the same thing as dirt?
NO!!!!!
The solid layer of rock that is below the soil.
Bedrock
Chemical Weathering happens faster in _____ environments and at ______ temperatures.
What is release of pressure in relation to mechanical weathering?
As erosion removes material from a rock pressure is reduced. With the release of pressure the outside of the rock cracks and flakes away with the continued erosion.
When carbon dioxide is dissolved in water it combines with the hydrogen molecules and creates a weak acid called...
Carbonic Acid
What are the four particles of soil?
Gravel, sand, silt, and clay
Full of tiny holes that allow weathering and erosion to get inside the rock.
Permeable
Soil that has equal parts clay, sand, and silt
Loam
When water falls into a crack and freezes the ice expands and causes the crack to grow. This can be seen in sidewalks, and roads.
Frost Wedging (Freezing and Thawing)
The process by which iron and oxygen combine in the presence of water.
Oxidation
What are the three ways we identify soil quality?
Soil fertility
Soil Texture
Soil pH
What is the biggest rocky particle in soil? (One of the four things soil is made up of)
Gravel
The decayed material that is found in soil. It is very beneficial to the health of plants and the soil
Humus
DAILY DOUBLE!!!!! What are some ways that living things cause mechanical weathering?
Plants growing roots loosens the soil, animals dig into the ground, and humans cause weathering with mining, farming, and construction.
This slowly dissolves rock, or can be mixed with dangerous chemicals to form acid rain.
Water
The decayed material that is found in soil. It is very beneficial to the health of plants and the soil
Humus
What is the type of rock or metal that can rust?
Iron
The process of wearing down and carrying away rocks. This can be done using wind, water, gravity or ice.
Erosion
What are the six agents of mechanical weathering?
Animals, Freezing and Thawing, Plants, Release of Pressure, Abrasion, Human Activity
What are the four agents of chemical weathering?
Water, Oxygen, Carbon Dioxide, Living Organisms
What are the four soil horizons?
O horizon
A horizon
B horizon
C horizon
The principle that geologists use that says geologic processes happen the same way today as they did millions of years ago.
Uniformitarianism
DAILY DOUBLE!!!! What is the ideal pH range for plants?
6-7.5