"Glaciers Have No Defined Cleavage Planes, but Instead Flow Plastically

question 11

Multiple Choice

"Glaciers have no defined cleavage planes, but instead flow plastically." Evaluate this statement.

• A) This statement is true, but it only applies to the upper part of a glacier.
• B) This statement is false. Ice has cleavage similar to the mineral mica, and ice behaves like mica would under the same pressure.
• C) This statement is partially true. The flow of glaciers is very slow and more similar to gravel than to plastic.
• D) This statement is false. Glaciers do flow plastically, but also have well-defined cleavage planes similar to mica.

---

Definitions:

Labour Efficiency Variance

The difference between the actual hours worked and the standard hours expected to produce a certain level of output, valued at the standard labour rate.

Credit Balance

An account balance that shows money owed to the account holder, often indicating a creditor position in financial records.

Materials Price Variance

The difference between the actual cost of direct materials and the expected (standard) cost multiplied by the actual quantity purchased or used.

Labour Rate Variance

The difference between the actual cost of labor and the expected (or standard) cost.