The Earth's Interior Heat Engine Works Because Hot Buoyant Material

question 33

Multiple Choice

The Earth's interior heat engine works because hot buoyant material deep within the Earth _______ while cold denser material _______.

• A) moves upward; moves downward
• B) contracts and sinks; expands and rises
• C) contracts and rises; expands and sinks
• D) expand and sinks; contract and rises

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Definitions:

Combined ROI

The total return on investment generated from a set of investments or projects, combined into a single measure.

Net Operating Income

Represents the profit a company generates from its operations, minus all operating expenses except interest and taxes.

Turnover

The rate at which a company's inventory or assets are replaced or sold within a specific period.

ROI

Return on Investment; a performance measure used to evaluate the efficiency or profitability of an investment or compare the efficiency of multiple investments.