Which Phrase CORRECTLY Describes the Mantle of Earth

question 358

Multiple Choice

Which phrase CORRECTLY describes the mantle of Earth?

• A) molten iron
• B) solid rock that is hot enough to become semimolten and fluid
• C) molten rock
• D) solid, immovable rock upon which the crustal plates can slide

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Definitions:

Conductive Materials

Substances that permit the flow of electric current through them due to the presence of free charge carriers like electrons or ions.

Through-beam Photoelectric Sensor

A sensor that detects the presence of an object when the object interrupts a beam of light between transmitter and receiver components.

Light Beam

A narrow projection of photons, typically visible to the human eye, used in various applications from communication to measurement.

Latching Relays

Electromechanical switches that maintain their position (on or off) after being actuated, until they receive another specific actuation signal.