Weathering and Erosion

What is the process by which rocks are broken down into smaller pieces without changing their chemical composition?

• Mechanical weathering

• Chemical weathering

• Volcanic eruption

• Erosion

Answer explanation

Mechanical weathering is the process by which rocks are broken down into smaller pieces without changing their chemical composition.

Which type of weathering involves the breakdown of rocks through chemical reactions?

• Chemical weathering

• Biological weathering

• Mechanical weathering

• Physical weathering

Answer explanation

Chemical weathering involves the breakdown of rocks through chemical reactions, making it the correct choice among the options provided.

What is the term for the process of rocks being broken down into smaller pieces by physical forces?

• weathering

• dissolution

• disintegration

• erosion

Answer explanation

The correct term for the process of rocks being broken down into smaller pieces by physical forces is weathering.

Which type of weathering involves the physical breakdown of rocks without changing their chemical composition?

• Mechanical weathering

• Erosion

• Chemical weathering

• Biological weathering

Answer explanation

Mechanical weathering involves the physical breakdown of rocks without changing their chemical composition, making it the correct choice in this scenario.

What is the primary agent of erosion that shapes river valleys and canyons?

• water

• wind

• fire

• ice

Answer explanation

Water is the primary agent of erosion that shapes river valleys and canyons by wearing away rock and soil over time.

Which type of erosion is responsible for the formation of sand dunes in deserts?

• Glacial erosion

• Water erosion

• Chemical erosion

• Wind erosion

Answer explanation

Sand dunes in deserts are formed by wind erosion, not by glacial, water, or chemical erosion.

What is the term for the process of glaciers carving out valleys and shaping the landscape?

• glacial melting

• frost shaping

• glacial erosion

• ice sculpting

Answer explanation

Glacial erosion is the term for the process of glaciers carving out valleys and shaping the landscape, making it the correct choice.

Which type of erosion involves the movement of rocks and soil downhill due to gravity?

• Wind erosion

• Mass Movement

• Water erosion

• Chemical erosion

Answer explanation

Mass Movement involves the movement of rocks and soil downhill due to gravity, making it the correct choice.

What is the process by which living organisms such as plants and animals contribute to the breakdown of rocks?

• Weathering by erosion

• Biological weathering

• Physical weathering

• Chemical weathering

Answer explanation

Biological weathering is the process by which living organisms such as plants and animals contribute to the breakdown of rocks through their physical or chemical actions.

Which type of weathering involves the actions of plants and animals breaking down rocks?

• Chemical weathering

• Physical weathering

• Mechanical weathering

• Biological weathering

Answer explanation

Biological weathering involves the actions of plants and animals breaking down rocks, making it the correct choice in this context.