Weathering

Carbonic acid

CO2 dissolved in rainwater can become ___.

Marble and limestone

Carbonic acid easily weathers ____.

Holes or soft spots

Chemical weathering makes ___ in rock which makes the rock break apart easier

Mineral makeup

Chemical weathering produces rocks that have a different ___ than the original rock

Mountains

Given enough time, physical weathering can wear away whole ___.

Together

Physical and Chemical weathering often work _______ or at the same time

Surface area

Physical weathering breaks rock into smaller pieces so more ___ is exposed on the rocks to chemical weathering

Slowly

Physical weathering works ___.

Lichens

Pioneer plants that are the first to grow onto bare rock.

Roots

Plant ____ can push into cracks and make weak acids that slowly dissolve rock

Acid rain

Rain with a lower pH than normal rain

Water

The MOST important agent of chemical weathering

Smaller

The forces of weathering break the rocks into ___ and smaller pieces

Abrasion

The grinding away of rock by rock particles carried by water, ice, wind, or gravity

Erosion

The movement of rock particles by wind, water, ice, or gravity

Weathering

The process that breaks down rock and other substances at the Earth's surface

Ice wedging

The process that splits rock when water seeps into cracks, then freezes and expands

Oxygen

This can cause rocks with iron in them to rust (oxidation)

Type of Rock AND Climate

Two most important factors that determine the RATE of weathering

Dissolving

Water weathers rock by ___ rock

Chemical

Weathering that breaks down rock through chemical changes

Physical

Weathering that physically breaks down rocks into smaller pieces.

Weathering & Erosion

Work TOGETHER to wear down and carry away rocks at Earth's surface

Permeable

____ (porous) rocks have faster weathering rates than other rock types

Hot and wet

______ climates have faster weathering rates than others