Weathering

Which of the following best describes 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

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

• they get smaller and rounder

• smaller and more jagged

• much larger and rounder

• gets larger and more jagged

Which is an example of oxidation?

• Rust decomposes rocks completely with the passage of time.

• Some of the minerals get dissolved in water.

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

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

In which of the following climates will chemical weathering be most rapid?

• hot and dry

• cold and dry

• hot and humid

• cold and humid

Which of the following is an example of biological weathering?

• Freeze-thaw

• Wind blowing sand onto a rock

• Abrasion due to the movement of glaciers

• Plant that grows on the cracks of the rocks

Which is not included in the group?

• abrasion

• acidification

• carbonation

• hydration

Weak organic acids are produced by the action of the growing root 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 through chemical compounds

Which type of rocks tends to weather more rapidly through the hydrolysis process?

• Rocks that contain iron.

• Rocks that contain feldspar.

• Rocks that contain quartz.

• Rocks that are impermeable.

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

• rain and ice

• type of rock and climate

• time and date

• size of rock and time of the year

Which of the following best describes chemical weathering?

• The process by which rocks are broken down by physical forces

• The process by which rocks are broken down by chemical means

• The process by which rocks are broken down by anthropogenic activities

• all of these