Exam 1: Thinking Like an Astronomer

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The statement ''our universe is but one of a multitude of isolated universes'' is best characterized as a:

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A scientific theory can be proved wrong if:

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Describe how talking about time can give us a feeling for distance.

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If speed is constant,a difference in time is directly related to a difference in distance.A time difference is easier to conceptualize.

One of the nearest stars is Alpha Centauri,whose distance is 4.4 light-years.The time it takes light to travel from Alpha Centauri to us is:

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Light from the Sun takes about ________ to reach Earth.

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________ is the idea that the simplest explanation for a phenomenon is usually the correct one.

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The word astronomy:

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The cosmological principle states that:

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If the diameter of our galaxy is approximately 100,000 light-years,our galaxy is ________ times larger than our Solar System.

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The early universe was composed mainly of which two elements?

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If you were to specify your address in the universe,listing your membership from the smallest to largest physical structures,it would be:

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The language of science is:

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Name three dwarf planets.

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The kind of mathematics that deals with change is called:

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What are the speeds of the car at points a,b,and c indicated by the graph of Figure 1.10 of the textbook?

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A light-year is a unit of measurement for:

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What is the ONLY thing that makes the Sun an exceptional star?

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The scientific method is a process by which scientists:

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The number of planets in the Solar System is

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Describe briefly why the phrase "we are stardust" is literally true.

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