Weathering, Erosion, and Deposition

What is mechanical weathering?

• The natural breakdown of rock into sediments by physical changes

• The process of rocks absorbing water and reacting with their molecules

• The scouring or scraping of rock caused by glaciers or wind-blown sand

• The peeling off of thin layers of rock from exposed surfaces

Tags

NGSS.MS-ESS2-2

What are the common causes of mechanical weathering?

• Ice wedging, root growth, and impacts

• Abrasion, exfoliation, and oxidation

• Hydration, carbonation, and hydrolysis

• Evaporation, adhesion, and cohesion

Tags

NGSS.MS-ESS2-2

What is exfoliation?

• The process of rocks absorbing water and reacting with their molecules

• The peeling off of thin layers of rock from exposed surfaces

• The scouring or scraping of rock caused by glaciers or wind-blown sand

• The natural breakdown of rock into sediments by physical changes

What are some agents of mechanical weathering?

• Ice wedging, root growth, and impacts

• Abrasion, exfoliation, and oxidation

• Hydration, carbonation, and hydrolysis

• Evaporation, adhesion, and cohesion

Tags

NGSS.MS-ESS2-2

What is chemical weathering?

• The natural breakdown of rock into sediments by physical changes

• The process of rocks absorbing water and reacting with their molecules

• The scouring or scraping of rock caused by glaciers or wind-blown sand

• The peeling off of thin layers of rock from exposed surfaces

Tags

NGSS.MS-PS1-2

What are some chemical reactions that cause chemical weathering?

• Ice wedging, root growth, and impacts

• Abrasion, exfoliation, and oxidation

• Hydration, carbonation, and hydrolysis

• Evaporation, adhesion, and cohesion

How does water contribute to chemical weathering?

• By freezing and expanding in cracks of rocks

• By dissolving certain rocks and minerals

• By breaking down small rocks as it carries them downstream

• By reacting with the molecules of rocks

What factors determine the rate of weathering?

• The composition of the rock, the rock's surface area, and climate conditions

• The actions of living organisms and the shape of the landscape

• The elevation and the temperature

• The humidity and the actions of living organisms

What is differential weathering?

• The process of rocks absorbing water and reacting with their molecules

• The peeling off of thin layers of rock from exposed surfaces

• The scouring or scraping of rock caused by glaciers or wind-blown sand

• The uneven weathering of different rocks in the same landform

Tags

NGSS.MS-ESS2-2

Why do rocks with a greater surface-area-to-volume ratio change faster?

• Because they are more exposed to air and water

• Because they have a higher elevation

• Because they are more resistant to weathering

• Because they have a higher temperature

Tags

NGSS.MS-ESS2-2