Weathering processes

What is the correct definition for weathering?

• The disintegration and decomposition of rock in situ

• The geological process where material is worn away and transported by natural forces such as wind or water

• The heating and cooling of rock where there is a large diurnal temperature range.

This type of weathering occurs when rock is physically broken down into smaller pieces of rock.

• mechanical weathering
• chemical weathering
• erosion weathering
• deposition

This type of weathering occurs when rocks weaken then break down due to chemical changes in the composition of the rock.

• mechanical weathering
• chemical weathering
• erosion weathering
• deposition

A large diurnal temperature range is necessary for which type of weathering process?

• Heating and cooling

• Dilatation

• Hydrolysis

• Salt Crystallisation

Identify the weathering process from the description: When saline solution gets into the joints of rocks. The water evaporates and leaves salt crystals behind. The salt expands and exerts pressure on the rock causing joints to expand and disintegrate.

• Hydration

• Salt Crystallisation

• Carbonation

• Pressure-release

What are humic acids?

• Acids created by the addition of carbon dioxide to water

• The acids released due to the decay of organic materials

• The acids created by the saliva of animals

• The acids created as a result of air pollution

Which is not a type of biological weathering?

• Bioturbation

• Burrowing organisms

• Chelation

• Root action

• Photosynthesis

Identify the weathering process from the equation

• Hydrolysis

• Oxidation

• Hydration

• Carbonation

Pseudo-bedding planes are created due to overlying pressure being released. What type of weathering causes this to happen?

• Dilatation

• Hydrolysis

• Heating and cooling

• Oxidation

Identify the weathering process

• Freeze-thaw

• Pressure - release

• Salt Crystallisation

• Carbonation