How Have We Gained Knowledge of Earth's Internal Structure

question 95

Multiple Choice

How have we gained knowledge of Earth's internal structure?

• A)analysis of seismic waves passing through Earth's layers
• B)direct observation of Earth's inner layers
• C)studying rock samples after underground nuclear tests
• D)core samples
• E)x-rays

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Definitions:

Randomly Varying

Exhibiting changes that lack a specific pattern, direction, or expectation, occurring in a manner that cannot be predicted.

Reinforcement

In behavioral psychology, a consequence that will strengthen an organism's future behavior whenever that behavior is preceded by a specific antecedent stimulus.

Variable Interval

A variable interval refers to a schedule of reinforcement where a response is rewarded after an unpredictable amount of time has passed, used in behaviorist studies.

Fixed Interval

A schedule of reinforcement where a response is rewarded after a set period of time has passed.