Exam 1: Here and Now

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The radius of the Moon's orbit is about ____ times larger than the radius of Earth.

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C

Why do we measure some distances in astronomy in light-years and some in astronomical units?

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Consider using millimeters to describe the distance between New York and California, 3,920,000,000 millimeters. This distance is correct, but it is far more convenient to state the distance as 3920 kilometers. Distances in astronomy are huge when compared to distances we measure on Earth. It is simpler and more convenient to use larger distance units for discussion and calculations.

Draw a schematic (not to scale) of filaments, walls, and voids, labeling each.

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The drawing should look like soap bubbles.

According to the text, the Sun is a very _____________ star.

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How long does light take to reach us from Proxima Centuri?

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Draw a schematic (not to scale) of the Milky Way Galaxy face on so that you see the spiral arms. Label the spiral arms. Now draw a schematic (not to scale) of the Milky Way Galaxy edge-on, and locate and label the disk.

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The average distance from Earth to the Sun is

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Describe the difference between a solar system and a galaxy.

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________________ is the closest star to Earth.

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A(n) ____________________ is the distance that light would travel in one year.

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"I live 20 minutes from Center City." How is this statement similar to giving astronomical distances in light-years?

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The relative distance between the planets increase with distance from the Sun.

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A(n) ____________________ is the largest known structure in the universe.

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Life began on land.

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3.0 × 105 times 1.5 × 109 is equal to

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Which of these is NOT a common misconception?

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Which is the correct order for the following steps used in the scientific method? I. Conclude II. Analyze III. Gather evidence IV. Test V. Hypothesize VI. Establish laws

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A kilometer contains 1 million meters.

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Which shape best describes how stars look when seen through a telescope?

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The Milky Way Galaxy is alone, that is, not a part of a group or cluster.

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