Modified True/False
Indicate
whether the sentence or statement is true or false. If false, change the identified word or
phrase to make the sentence or statement true.
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1.
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Radio
waves are shorter than waves of visible light. _________________________
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2.
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A
reflecting telescope uses a mirror to focus light onto a small area.
_________________________
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3.
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Most
galaxies are moving away from each other, which means the universe is contracting.
_________________________
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4.
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Astronomers measure distances to stars in units called kilometers.
_________________________
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5.
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The
brightness of a star as seen from Earth is its apparent magnitude.
_________________________
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6.
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A
star that has no fuel but glows faintly is a black dwarf.
_________________________
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7.
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Stars
with less mass will last longer than stars with more mass.
_________________________
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8.
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The
solar system was formed after the Milky Way galaxy was formed.
_________________________
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9.
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A
star system has at least three stars. _________________________
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10.
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The
sun is part of an elliptical galaxy. _________________________
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Essay
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11.
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Explain how a spectrograph provides information about a star’s chemical
composition.
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12.
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Define parallax and explain how astronomers use it to measure distances to
stars.
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13.
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Compare and contrast spiral and elliptical galaxies.
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14.
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Algol
is a star system with two stars. Explain why one star sometimes seems to disappear.
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15.
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Explain the difference between apparent magnitude and absolute magnitude of
stars.
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16.
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Compare and contrast a reflecting telescope and a refracting telescope.
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17.
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Describe what happens to a small star, a medium star, and a giant star when each runs
out of fuel.
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18.
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Describe how the solar system probably formed.
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