Unit #4 Weathering & Erosion

Pollution from factories dissolves in rainwater & eats away at rocks

• sheet joining

• acid rain

• ice wedging

• abrasion

Grinding away of rocks

• exfoliation

• sheet joining

• ice wedging

• abrasion

Peeling of rounded thin layers from the rock's surface

• exfoliation

• abrasion

• ice wedging

• sheet joining

large sheets of rock breaking away

• abrasion

• sheet joining

• exfoliation

• ice wedging

Carbon acids dissolve rocks & caves from underground

• acid rain

• abrasion

• carbon dioxide

• sheet joining

Force of freezing water-splits rock apart

• ice wedging

• exfoliation

• sheet joining

• abrasion

Chemical reaction of oxygen with other substances (rust)

• exfoliation

• sheet joining

• abrasion

• oxidation

A permeable rock weather easily because

• it is made up of small particles

• contains many small, connected airspaces

• is made up of only one mineral

What kind of weathering causes the mineral composition of rocks to change?

• mechanical

• chemical

• physical

The growth of plant roots and animal activity may result in

• weathering

• erosion

• deposition