W.E.D. Review

What is weathering?

• The movement of sediments

• Sediments stop moving

• The breakdown of sediments

• The creation of sediment

Physical weathering...

• changes the shape and size of sediments

• Changes the sediment into a new substance

• transports the material to new locations

• particles stop moving particles stop moving

Frost action is what type of weathering?

• Chemical

• Physical

Frost action is when...

• water freezes on the leaves of trees

• water freezes and contracts in the cracks of rocks

• water freezes and expands in the cracks of rocks

• water freezes in cracks of rocks & compresses the rock

Abrasion is when...

• sediments collide into one another by animals

• animals and plants grow in cracks causing rock to break

• sediments collide by wind only

• sediments collide into one another by water and wind

Biological Action is when...

• burrowing animals and plant roots cause sediments to split

• water freezes expands in cracks and breaks up sediment

• sediments collide due to water and wind

• changes the chemical composition of the sediment

Chemical weathering...

• Sediments break into smaller sizes and pieces

• The chemical composition of rock changes

• The movement of sediments

• Sediments stop moving

When oxygen in the atmosphere chemically reacts with minerals...

• sediment precipitates

• dissolving mineral by acid

• oxidation

• orographic lift

Oxidation is what type of weathering?

• chemical

• physical

When carbonic acid reacts with limestone, it creates...

• mountains

• caves and sinkholes

• acid rain

• more resistant sediment more resistant sediment