Exam 18: Amazing Ice: Glaciers and Ice Ages

During the last ice age,a ________ glacier covered much of the northern United States.

Glacial deposits consist primarily of __________.

Sediments deposited directly by glaciers as they melt are ________.

Label the four different types of mountain glaciers shown in the picture below.

The effect of periodic changes in the Earth's orbital eccentricity and magnitude and direction (precession)of its axial tilt on the advance and retreat of ice sheets was first proposed by ________.

An important long-term factor that determines whether glacial ice will form on a continent has likely been the proportion of which gas in the atmosphere?

The weight of a large ice sheets causes

Notice the boulders in the center of this picture of a glacially formed landscape.What are they? How did they get there?

Which letter corresponds to the furthest reach of the glacier in the figure below?

The Milankovitch cycles describe the change in ________ caused by cyclical changes in the Earth's orbit around the Sun.

List and describe one short-term cause for glaciations.

The loss of rainforests would ________ the greenhouse gases,thereby ________ global warming.

What is glacial drift?

What are the circumstances that lead to glacial advance versus glacial retreat? Most glaciers today are in retreat.What does this imply about the glaciers and their environment?

Boulders left behind by glacial ice,such as these on a hillside in Wyoming,are known as __________.

A(n)________ in global sea level is ultimately the result of a ________ event.

Valleys carved by glaciers tend to be shaped like the letter ________,whereas valleys carved by water tend to be shaped like the letter ________.

By increasing the albedo of the Earth,global ice sheets produce conditions that are ________ to their further advance,thus providing an example of ________ feedback.

At depths of greater than 60 m,ice moves by plastic deformation.What causes this transition from brittle to ductile behavior?

Imagine that you live in a hot and sunny climate.Painting your roof white would help ________ your house by ________ the albedo.