Which Statement About the Dark Nebulae Is True

question 13

Multiple Choice

Which statement about the dark nebulae is true?

• A)Hydrogen and helium are the chief absorbing and scattering agents.
• B)They block the vast majority of radio waves from our Galaxy.
• C)They can be penetrated only with longer wavelengths such as radio and infrared.
• D)They comprise the majority of the mass of the Galaxy.
• E)They can be penetrated only with shorter waves, such as UV and X-ray.

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Definitions:

Centralization

The concentration of administrative power and decision-making authority in a central location or governing body.

Industrialize

The process by which an economy is transformed from primarily agricultural to one based on the manufacturing of goods, involving mechanization and an increase in production capacity.

Northern Iron Works

Historic foundries in the Northern United States, significant for their role in the industrialization era.

Separate Peace

An agreement to cease hostilities and settle peace terms independently, often by one party in a wider conflict without the consensus of its allies.