Scientists Now Understand That the Earth Consists of Layers, with the Densest

question 29

Multiple Choice

Scientists now understand that the Earth consists of layers, with the densest materials in the core. What allowed the differentiation of the Earth's layers to happen?

• A) a giant rock from space hit the Earth and made a huge hole almost to the center, through which material could move
• B) continental drift and plate tectonics made this happen
• C) the early Earth must have been so hot it was like a liquid and heavier things sank to the middle
• D) this is one of the things that happened in the last few thousand years because of global warming
• E) this is an unsolved problem; scientists have no good ideas about this at all

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Definitions:

Harmony

A state of agreement or concord, often characterized by a peaceful and cooperative relationship among individuals or groups.

Bureaucracy

A system of administration characterized by strict policies, procedures, and hierarchy, often within a government or large organization.

Technical Competence

The skill and knowledge required to proficiently perform specific tasks, often related to a particular field of work or study.

Unity of Command Principle

The principle that each employee should report to only one manager, to prevent confusion and conflict.