The Direction of Earth's Rotation About Its Axis Is the Same

question 323

Multiple Choice

The direction of Earth's rotation about its axis is the same as the direction of its revolution about the Sun.How does a solar day compare with a sidereal day on Earth?

• A) A solar day is always longer.
• B) A sidereal day is always longer.
• C) A solar day and a sidereal day are always the same length.
• D) A sidereal day is longer when Earth is farther from the Sun (northern summer), but a solar day is longer when Earth is closer to the Sun (northern winter).

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Definitions:

Hypothetical Proposition

A compound proposition that uses the connective “if . . . then.”

Disjunctive Proposition

A statement in logic that presents two or more alternatives, where the truth of at least one alternative makes the proposition true.

Contrapositive

A logical statement derived by negating and swapping the hypothesis and conclusion of the original conditional statement. If the original statement is "If P, then Q," the contrapositive is "If not Q, then not P."

Hypothetical Proposition

A proposition or statement that is based on a hypothesis or an assumption rather than on known facts.