Glacier Erosion

What makes glaciers move?

• Rocks shifting

• Ice melting and pushing the glacier

• Tons of ice crammed into a small space

• Nah, glaciers don't move.

What method is used to show the movement of glacier ice?

• Measuring the end of the glacier at the beginning and end of the year

• Taking a video for a day

• Using a stationary camera to create a time-lapse video over the course of a year

• Wait, the glacier's really moving?

What creates crevasses in the ice?

• Hard brittle ice near the top of the glacier split apart

• Soft plastic ice near the bottom of the glacier splits apart

• Impacts in the ice, like from a meteor

• Erosion of the ice.

Water melting from the glacier gets into crevasses and forms ice caves. What makes the ice caves so important?

• They look cool!

• They are formed by erosion

• It allows water to touch the bedrock and help move the glacier

• They protect wildlife from extreme weather

Ice caves are________.

• permanent

• transient

• very cool

• always the same