The Heat Energy That Powers Tectonic Activity on the Surface

question 321

Multiple Choice

The heat energy that powers tectonic activity on the surface of Earth originates deep in Earth's core.What is the main reason Earth's core does not cool rapidly as a result?

• A) Earth is still contracting gravitationally and converting gravitational potential energy into heat.
• B) Convection returns heat energy to the core from the upper mantle.
• C) Conduction returns heat energy to the core from the upper mantle.
• D) Radioactivity in the core and lower mantle provides additional heat.

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Definitions:

Regression

A statistical technique used to determine the strength and character of the relationship between one dependent variable and one or more independent variables.

Geographic Distribution

The manner in which a particular natural feature, population, or resource is spread out across the Earth's surface.

Eroded Away

The process by which natural forces remove and transport soil, rock, or other material from one location to another.

Geologic Timescale

A system of chronological dating that relates geological strata to time, used by geologists to describe the timing and relationships of events in Earth's history.