PRE (WEATHERING)

Which of the following best describe weathering?

• The process by which rocks are exposed to severe weather

• The process by which rocks are formed by heat and pressure

• The mechanical or chemical process by which rocks are broken down

• The process by which rocks are chemically strengthened due to exposure to heat and pressure

How does gravity contribute to weathering?

• by abrasion of the rocks

• by the expansion of rocks

• by dissolving rocks' particles

• by creating holes in particles

Which of the following conditions will speed up chemical weathering?

• fracturing

• thick soil

• high amount of rainfall

• cold temperatures

What are the two things that affect the rate of weathering?

• time and date

• type of rock and climate

• rain and ice

• size of rock and time of the year

Which is NOT included in the group?

• carbonation

• abrasion

• acidification

• hydration

Weak organic acids are produced by the action of the growing roots of lichens. These acids react with some minerals in rocks resulting in the decomposition of rocks. How will you classify this process?

• Physical weathering

• Chemical weathering

• Biological weathering through physical means

• Biological weathering chemical compounds

Which is an example of oxidation?

• Rust decomposes rocks completely with the passage of time.

• Some of the minerals get dissolved.

• The joints enlarge in size and lime is removed from the solution.

• Due to the absorption of water by rocks, its volume increases

What happens to pieces of rock as they are transported by a river?

• They get smaller and rounder

• much larger and rounder

• smaller and more jagged

• gets a larger and more jagged

In hydration, water is an active agent of chemical weathering. What happens when water loosely combines with the minerals of the rock?

• converts them together

• converts the mineral into another kind

• transports the rock into a lower altitude

• weaken the molecular binding of the minerals

Which of the following climates will chemical weathering be most rapid?

• cold and dry

• cold and humid

• hot and dry

• hot and humid