Ellie Flashcards
Forces of Chemical weathering
Water, oxygen ,carbon dioxide, living organisms, acid rain
Forces of Mechanical weathering
Freezing and thawing, release of pressure, abrasion, actions of animals, plant growth
Ice wedging
First water seeps into cracks, it freezes and expands, ice widens cracks, water thaws
and repeats the process
Abrasion
The grinding away of rock by rock particles carried by water, ice, wind, or gravity
Mechanical
Mechanical weathering
Rock is physically broken down into smaller pieces
Chemical weathering
The process that breaks down rock through chemical changes
Water
Is the most important cause of chemical weathering
Oxygen
Causes iron to Rust
Chemical
Carbon dioxide
Forms carbonic acid
Chemical
Living organisms
Lichens Are one example
Chemical
Acid rain
Caused by pollution
Chemical
Oxidation
Oxygen weathers rock through this process
Two types of rock that are easily weather by carbonic acid
Limestone and marble
How do plants dissolve rock
It’s roots push into the cracks in the rock and it produces weak acids that slowly dissolve rock around the roots
Climate
The most important factors that determine the rate of weathering are type of rock and this
Permeable
A rock that is full of tiny, connected air spaces
Erosion
Is the movement of rock particles by wind, water, ice, or gravity
Weathering
The process that breaks down rock and other materials at earths surface
Plant growth
Roots pry apart cracks in rock
Mechanical
Animal actions
Burrowing in the ground breaks rock
Mechanical
Carbonic acid
Weathers marble and limestone
Chemical
Freezing and thawing
Brakes rock by ice wedging
Mechanical
