If No One Has Ever Visited the Core of the Earth

question 35

Multiple Choice

If no one has ever visited the core of the Earth, how do we know that it is made of metals?

• A) core material seeps up through volcanoes in the crust
• B) circulating liquid metals in the core set up a large (measurable) magnetic field
• C) spectroscopy allows us to tell what the core is made of by analyzing the light we receive
• D) the amount of radioactivity shows metals must be present; only metals are radioactive
• E) you can't fool me; there is NO evidence that the Earth's core has metals

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Definitions:

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A televised singing competition in the United States, which seeks to discover the best solo recording artist among its contestants.

Intuition

The ability to understand or know something immediately, based on feeling rather than factual reasoning.

Learning

A process that results in a relatively permanent change in knowledge or behavior due to experience.

Persuasion

The act or process of influencing someone's beliefs, attitudes, intentions, motivations, or behaviors through argument, reasoning, or appeal.