Erosion and Its Types

What is the main cause of most erosion on Earth?

• Water

• Volcanoes

• Ice

• Wind

What is it called when rivers pick up sediment and carry it along?

• Suspension

• Saltation

• Load

• Creep

What happens when a river moves faster?

• It stops eroding

• It can pick up bigger sediment

• It only picks up clay

• It erodes less

At what speed can a river pick up clay, silt, sand, and pebbles?

• 1 cm/s

• 300 cm/s

• 50 cm/s

• 100 cm/s

What is required for all erosion on Earth?

• Ice

• Water

• Gravity

• Wind

What type of erosion involves the movement of rock debris and soil downhill?

• Rockfall

• Landslide

• Glacier

• Wind

What type of erosion is caused by rocks falling downhill due to gravity?

• Landslide

• Glacier

• Wind

• Rockfall

What is the process called when water gets into cracks, freezes, and moves soil downhill?

• Suspension

• Creep

• Freeze-thaw cycles

• Saltation

What are the dark streaks inside a glacier?

• Air

• Water

• Ice

• Sediment and rocks

What is a lahar?

• A type of glacier erosion

• A mudflow made of ash, water, and debris

• A type of landslide

• A type of wind erosion