Unit 1 Space REVIEW

Front

How long does it take for the Earth to complete one revolution around the Sun?

Back

Approximately 365 days

Front

How long does it take for the Earth to complete one rotation on its axis?

Back

Approximately 24 hours

Front

Revolution (as it relates to Earth)

Back

The movement of Earth in its orbit around the Sun

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Vocab

Front

What is meant by rotation in the context of Earth’s movements?

Back

The spinning of Earth on its axis

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Vocab

Front

What is the primary cause of tides on Earth?

Back

The gravitational pull of the Moon and the Sun

Front

The ongoing increase in the distance between galaxies.

Back

Cosmic Expansion

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Vocab

Front

The mysterious substance that makes up most of the matter in the universe but does not interact with light.

Back

Dark Matter

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Vocab

Front

The afterglow of the Big Bang, a form of electromagnetic radiation filling the universe.

Back

Cosmic Microwave Background

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Vocab

Front

The rapid expansion of the universe immediately after the Big Bang.

Back

Inflation

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Vocab

Front

A point in space where density and gravity become infinite (such as the center of a black hole). Also describes the extremely hot, dense state of the universe at its earliest moments.

Back

Singularity

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Vocab