6th Weathering Quiz 2A

Choose M if the term is related to mechanical weathering. Write C if the term is related to chemical weathering. ACID RAIN

• C

• M

Answer explanation

ACID RAIN is related to chemical weathering because it involves the reaction of rainwater with pollutants, leading to the breakdown of rocks and minerals through chemical processes.

Choose M if the term is related to mechanical weathering. Write C if the term is related to chemical weathering. FROST HEAVING

• M

• C

Answer explanation

Frost heaving is a process where water in the soil freezes and expands, causing the ground to shift. This is a physical process, thus it is related to mechanical weathering, making 'M' the correct choice.

Choose M if the term is related to mechanical weathering. Write C if the term is related to chemical weathering. EXFOLIATION

• M

• C

Answer explanation

Exfoliation is a process of mechanical weathering where layers of rock peel away due to temperature changes. Therefore, it is related to mechanical weathering, making M the correct choice.

Choose M if the term is related to mechanical weathering. Write C if the term is related to chemical weathering. OXIDATION

• C

• M

Answer explanation

Oxidation is a process where minerals react with oxygen, leading to changes in their chemical composition. This makes it a key aspect of chemical weathering, not mechanical weathering, hence the correct choice is C.

Choose M if the term is related to mechanical weathering. Write C if the term is related to chemical weathering. ACID FROM LICHENS and MOSSES

• C

• M

Answer explanation

The term 'ACID FROM LICHENS and MOSSES' refers to the chemical processes that break down rocks, indicating it is related to chemical weathering. Therefore, the correct choice is C.

Choose M if the term is related to mechanical weathering. Write C if the term is related to chemical weathering. ABRASION

• M

• C

Answer explanation

The term 'abrasion' refers to the mechanical wearing down of rocks and minerals through physical processes, such as friction and impact. Therefore, it is related to mechanical weathering, making 'M' the correct choice.

Complete the sentence. The process of breaking down rocks is called ____.

• stalagmite

• weathering

• oxidation

Answer explanation

The process of breaking down rocks is called weathering. It involves physical and chemical processes that lead to the disintegration and alteration of rocks, unlike stalagmites, which are formations in caves, or oxidation, a specific chemical reaction.

Complete the sentence. ____ forms when carbon dioxide dissolves in water.

• carbonic acid

• oxidation

• stalactite

Answer explanation

Carbonic acid forms when carbon dioxide dissolves in water, resulting in a weak acid that plays a significant role in the carbon cycle and affects the pH of natural waters.

Complete the sentence. Dripping dissolved calcite causes a ____ to build up on the floor of a cave.

• carbonic acid

• stalagmite

• oxidation

Answer explanation

Dripping dissolved calcite, which is rich in calcium carbonate, leads to the formation of stalagmites on cave floors as the calcite precipitates out of the solution when the water evaporates.

Complete the sentence. ____ occurs when oxygen combines with what a rock is made of and forms new compounds.

• stalactite

• oxidation

• stalagmite

Answer explanation

Oxidation occurs when oxygen reacts with minerals in rocks, leading to the formation of new compounds. This process is essential in geology and differentiates it from stalactites and stalagmites, which are formations in caves.