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:

Contingencies

Events or conditions that might occur in the future and can affect the outcome of plans.

Collegiality

A cooperative relationship between colleagues, characterized by respect, empathy, and professionalism.

Critical Path

The sequence of stages or tasks that determines the minimum time needed to complete a project or operation.

PERT Chart

A project management tool used to schedule, organize, and coordinate tasks within a project.