Why Is It Possible for Rock Avalanches to Move at Speeds

question 82

Multiple Choice

Why is it possible for rock avalanches to move at speeds in excess of 200 kilometers per hour?

• A)They are moving with large quantities of water.
• B)They are moving with molten material such as lava.
• C)They are moving with large quantities of air trapped and compressed beneath the debris.
• D)They are moving with large chunks of ice compressed beneath the moving material.

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Definitions:

X

Often used to represent an unknown variable in mathematics.

Unit Price

The unit price is the cost per unit of a product, allowing for a standard comparison of costs among different sized packages of the same item.

Ounce

A unit of weight used in the British, United States, and other Imperial systems, equivalent to one-sixteenth of a pound.

Pineapple

A tropical fruit with a rough, spiky outer skin, sweet firm interior, and a tuft of stiff leaves on top.