The Look-Back Time Is

question 73

Multiple Choice

The look-back time is

• A) the time it takes for the light from an object to reach Earth.
• B) numerically equal to the distance in light-years.
• C) smaller for more distant objects.
• D) all of the above.
• E) a and b above.

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Definitions:

Neutral Belgium

Refers to Belgium's policy of neutrality before and during parts of both World War I and World War II, attempting to avoid entanglement in the conflicts of its larger neighbors.

Poison Gas

Chemical weapons used in warfare designed to inflict death or harm on human beings through toxic properties.

Expeditionary Force

A military force dispatched to fight in a foreign country.

Woodrow Wilson

The 28th President of the United States (1913-1921), known for his leadership during World War I, the creation of the League of Nations, and his advocacy for democracy and peace.