Erosion by gravity - Quiz

What is erosion?

• A) A process that deposits sediments in one place

• B) A process that wears away surface materials and moves them from one place to another

• C) The force of attraction that pulls objects toward Earth's center

• D) A type of water current that shapes the Earth's surface

Which force is considered an important erosional force?

• A) Magnetism

• B) Friction

• C) Gravity

• D) Electricity

What is required for water and wind to erode materials?

• Low temperature

• Enough energy of motion

• Solid ice

• Gravity

What can a strong wind move?

• Only small particles like dust

• Only large particles

• Both dust and larger particles

• Water

How does glacial erosion work?

• By water flowing over rocks

• By wind blowing over land

• By slowly moving sediment that is trapped in solid ice

• By the rapid melting of ice

What happens to sediment as ice melts?

• It evaporates

• It is compressed

• It is eroded further

• It is deposited, or dropped

What is the process called when agents of erosion drop the sediments they are carrying as they lose energy?

• Compaction

• Deposition

• Erosion

• Weathering

Which of the following is NOT a type of mass movement?

• Slump

• Creep

• Avalanche

• Mudflow

What can cause a clay layer to weaken in a geological context?

• The presence of a weaker rock layer above the clay.

• The clay layer drying out and cracking.

• The weight of a strong rock layer lying on top of the clay.

• Erosion by wind removing the top layer of the clay.

Which of the following is an indicator of creep?

• Uplifted roadways

• Leaning trees and human-built structures

• Cracks in the ground

• Sudden collapse of a hillside