Exam 13: Glaciers and Glaciation

The zone of ____________________ is the portion of a glacier where additions exceed losses.

A glacier that is now longer flowing is called a(n) ____________________ glacier.

If glacial ice were considered a rock, what type of rock would it be, and why?

What are eskers, and how do they form?

What is a fiord, and how does one form?

The furthest extent of the glacial advancement is called as the end or terminal moraine.

An arête is a narrow, serrated ridge between two glacial valleys or adjacent cirques.

How do continental glaciers differ from valley glaciers?

The ice ages are caused by:

The distal end or edge of the glacier is called its ____________________.

Straight scratches on rock surfaces created by glacial abrasion are known as:

The fact that the Earth's orbit around the sun changes over time is called ____________________.

Describe the conditions that would make a valley glacier flow faster.

The only continent that does not presently have glaciers is:

How does the Milankovitch theory explain intermediate-term climatic events like the Pleistocene glaciation? According to Milankovitch, variations in what three parameters of Earth's orbit were responsible for the onset of Pleistocene glaciation?

If the firn limit on a glacier does not change from year to year, the glacier has a balanced snow budget.

Why is the velocity of valley glaciers slower along valley walls than in the center of the glacier?

Earth's orbit varies from nearly a circle to an ellipse and back again in about:

The terms continental glacier and ice sheet are synonymous.

Under what conditions do large crevasses develop in glaciers? What forces act to produce them, and where in the glacier are they found? What happens if a glacier descends over a steep precipice?