Astronomy A Test 1

Name

According to the following figure, how much longer ago was the end of the last ice age than World War I?

• 100 orders of magnitude longer ago
• two orders of magnitude longer ago
• two times longer ago
• 9,900 orders of magnitude longer ago

Express 10,000,000 in standard scientific notation.

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• 
• 
• 

Express 0.0003 in standard scientific notation.

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• 
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The figure shows the approximate size of our solar system. Express that size in everyday notation.

• 1,000,000,000,000
• 10,000,000,000,000
• 100,000,000,000,000
• 130

The entire population of the United States is about 3.0 × 108 people. Suppose that each person spends thirty seconds reading the latest astronomy news. How many total hours will the people of the United States have spent learning about the latest advance?

• 2.5 million
• 25 million
• 250 million
• 2.5 billion

A parsec is a unit of

• angle.
• time.
• mass.
• distance.

Which of these lists correctly arranges these astronomical objects in order from smallest to largest?

• planet, star, galaxy, galaxy cluster, supercluster
• planet, galaxy, star, supercluster, galaxy cluster
• star, planet, galaxy, galaxy cluster, supercluster
• planet, star, supercluster, galaxy cluster, galaxy

What observation was crucial to determining the overall scale of the Solar System in the 19th century?

• the size of the moon
• the timing of solar eclipses
• the orbits of the Galilean moons of Jupiter
• the transits of Venus

Scientists refer to a well-developed body of knowledge that has been tested many times in many different ways as a

• hypothesis.
• framework.
• theory.
• truth.