Geology 100 – Exam 2 Study Guide & Practice Questions | Test Bank Review

Geology 100 - Exam 2 2026




the process at the earth's surface that breaks down
What is weathering?
mineral and rocks




What is erosion? transport of sediment formed from weathering




What are the 2 basic types of weathering? mechanical and chemical




breaks into smaller pieces but doesn't change
What is mechanical weathering?
chemical make-up (eg. freezing water)




converts to minerals and rocks stable at earth's
What is chemical weathering?
surface




True or false: all weathering occurs at earth's
false
surface.

, Geology 100 - Exam 2 2026

-frost wedging
-crystal growth
What are the different types of mechanical -thermal expansion and contraction
weathering? -mechanical exfoliation
-other (plants, abrasion in streams, glaciers, and
wind)




-chemical weathering
What is dissolution?
-solution by water




-chemical weathering
What is oxidation?
-combine with O2, Fe in silicate minerals




-chemical weathering
What is hydrolysis? -Al rich silicates (feldspars) going to clay. *yields
soil




-climate (temp and presence of water --the higher
the temp and more water, the faster reaction)
What affects weathering process speed? -living organisms (acids, burrowing, etc.)
-time (glacial, old/new)
-mineral composition (bonding olivine/quartz)