The Main Source of Energy for a Star as It

question 28

Multiple Choice

The main source of energy for a star as it grows in size to become a red giant is _ _.

• A)hydrogen fusion in a shell surrounding the central core
• B)hydrogen fusion in the central core
• C)gravitational contraction
• D)helium fusion in the central core

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Definitions:

Ozone

A molecule composed of three oxygen atoms, known for its protective layer in the Earth's stratosphere and as a pollutant at ground level.

National Ambient Air Quality Standards

Regulations established by the United States Environmental Protection Agency intended to limit pollution and protect public health and the environment.

EPA

The Environmental Protection Agency, a U.S. governmental agency tasked with protecting human health and the environment through regulations and enforcement.

Sulfur Oxide

A group of chemical compounds that are a combination of sulfur and oxygen, often associated with air pollution and acid rain.