EASC 101- Lecture 3

Mechanical or physical weathering is when

• a. rocks break down by chemical transformation into one or more new compounds

• b. rocks break down into smaller and smaller pieces without changing their mineral composition

• c. disintegrated rocks are transported from one place to another

• d. rocks are transformed by heat to another rock

Chemical weathering is when

• a. rocks break down by chemical transformation into one or more new compounds

• b. rocks break down into smaller and smaller pieces without changing their mineral composition

• c. disintegrated rocks are transported from one place to another

• d. rocks are transformed by heat to another rock

When large masses of igneous rock break loose in concentric layers following the removal of overburden, this is referred to as

• a. frost wedging

• b. oxidation

• c. sheeting

• d. talus

The most stable mineral at the surface of earth is

• a. olivine

• b. pyroxene

• c. plagioclase feldspar

• d. quartz

Chemical weathering can involve

• a. dissolution

• b. oxidation

• c. hydrolysis

• d. all of the above

The layer of rock and mineral fragments produced by weathering that overlies bedrock is called a

• a. lahar

• b. regolith

• c. batholith

• d. laccolith

Soil consists of a combination of ________ that supports the growth of plants

• a. mineral and organic matter

• b. water

• c. air

• d. all of the above

Soil formation is controlled by

• a. parent material and topography

• b. climate and time

• c. plants and animals

• d. all of the above

The B horizon of a soil is where

• a. finer particles are leached

• b. finer particles leached from above accumulate

• C. no change takes place

• d. unweathered rock is found

A pedocal is a soil with a high content of _________ that is found in southern alberta

• a. olivine

• b. copper

• c. calcium carbonate

• d. gypsum