AST 101 Final Exam Questions Uoft With
Correct Answers
Roughly how many stars are in the Milky Way Galaxy?
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A) 1 billion
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B) 100 billion
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C) 10 billion
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D) 100 million
| | |
E) 100 trillion - CORRECT ANSWER✔✔-B
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Which of the following statements does not use the term light-year in an
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appropriate way? | |
A) It's about 4 light-years from here to Alpha Centauri.
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B) It will take me light-years to complete this homework assignment.
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C) A light-year is about 10 trillion kilometres.
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D) It will take the Voyager spacecraft about 20,000 years to travel just 1 light-year.
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E) The Milky Way Galaxy is about 100,000 light-years in diameter. - CORRECT
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ANSWER✔✔-B
What makes the North Star, Polaris, special?
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A) It is the brightest star in the sky.
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B) It is the star straight overhead.
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C) It appears very near the north celestial pole.
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,D) It is the star directly on your northern horizon.
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E) It can be used to determine your longitude on Earth. - CORRECT ANSWER✔✔-C
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If the Moon is setting at 6 A.M., the phase of the Moon must be
| | | | | | | | | | | | | |
A) first quarter.
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B) third quarter.
| |
C) full.
| |
D) new.
|
E) waning crescent. - CORRECT ANSWER✔✔-C
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Kepler's second law, which states that as a planet moves around its orbit it
| | | | | | | | | | | | | |
sweeps out equal areas in equal times, means that
| | | | | | | |
A) a planet travels faster when it is nearer to the Sun and slower when it is
| | | | | | | | | | | | | | | | |
farther from the Sun. | | | |
B) a planet's period does not depend on the eccentricity of its orbit.
| | | | | | | | | | | |
C) planets that are farther from the Sun move at slower average speeds than
| | | | | | | | | | | | | |
nearer
planets.
D) the period of a planet does not depend on its mass.
| | | | | | | | | | |
E) planets have circular orbits. - CORRECT ANSWER✔✔-A
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What would happen if the Space Shuttle were launched with a speed greater
| | | | | | | | | | | | |
than Earth's escape velocity?
| | |
A) It would travel away from Earth into the solar system.
| | | | | | | | | | |
,B) It would travel in a higher orbit around Earth.
| | | | | | | | |
C) It would take less time to reach its bound orbit.
| | | | | | | | | |
D) It would orbit Earth at a faster velocity.
| | | | | | | |
E) It would be in an unstable orbit. - CORRECT ANSWER✔✔-A
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At which lunar phase(s) are tides least pronounced (e.g., the lowest high tides)?
| | | | | | | | | | | | |
A) first quarter
| |
B) new Moon
| |
C) full Moon
| |
D) both new and full Moons
| | | | |
E) both first and third quarters - CORRECT ANSWER✔✔-E
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At the centre of the Sun, fusion converts hydrogen into
| | | | | | | | | |
A) hydrogen compounds.
| |
B) Plasma.
|
C) radiation and elements like carbon and nitrogen.
| | | | | | |
D) radioactive elements like uranium and plutonium.
| | | | | | |
E) helium, energy, and neutrinos - CORRECT ANSWER✔✔-E
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Grass appears green because
| | |
A) it emits green light and absorbs other colours.
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B) it absorbs green light and emits other colours.
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C) it transmits green light and emits other colours.
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, D) it reflects green light and absorbs other colours - CORRECT ANSWER✔✔-D
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If you heat a gas so that collisions are continually bumping electrons to higher
| | | | | | | | | | | | | |
energy levels, when the electrons fall back to lower energy levels the gas
| | | | | | | | | | | | |
produces
A) thermal radiation.
| |
B) an absorption line spectrum.
| | | | |
C) an emission line spectrum.
| | | | |
D) X-rays.
|
E) radio waves. - CORRECT ANSWER✔✔-C
| | | | |
We can learn a lot about the properties of a star by studying its spectrum. All of
| | | | | | | | | | | | | | | | |
the following statements are true except one. Which one?
| | | | | | | |
A) The peak of the star's thermal emission tells us its temperature: Hotter stars
| | | | | | | | | | | | | |
peak at shorter (bluer) wavelengths.
| | | |
B) The total amount of light in the spectrum tells us the star's radius.
| | | | | | | | | | | | | |
C) We can identify chemical elements present in the star by recognizing patterns
| | | | | | | | | | | | |
of
spectral lines that correspond to particular chemicals.
| | | | | |
D) We can look at Doppler shifts of spectral lines to determine the star's speed
| | | | | | | | | | | | | | |
toward or |
away from us. - CORRECT ANSWER✔✔-B
| | | | |
The nebular theory of the formation of the solar system successfully predicts all
| | | | | | | | | | | | |
but one of the following. Which one does the theory not predict?
| | | | | | | | | | |
Correct Answers
Roughly how many stars are in the Milky Way Galaxy?
| | | | | | | | | |
A) 1 billion
| |
B) 100 billion
| | |
C) 10 billion
| | |
D) 100 million
| | |
E) 100 trillion - CORRECT ANSWER✔✔-B
| | | | |
Which of the following statements does not use the term light-year in an
| | | | | | | | | | | | |
appropriate way? | |
A) It's about 4 light-years from here to Alpha Centauri.
| | | | | | | | |
B) It will take me light-years to complete this homework assignment.
| | | | | | | | | | |
C) A light-year is about 10 trillion kilometres.
| | | | | | |
D) It will take the Voyager spacecraft about 20,000 years to travel just 1 light-year.
| | | | | | | | | | | | | |
E) The Milky Way Galaxy is about 100,000 light-years in diameter. - CORRECT
| | | | | | | | | | | | | |
ANSWER✔✔-B
What makes the North Star, Polaris, special?
| | | | | |
A) It is the brightest star in the sky.
| | | | | | | |
B) It is the star straight overhead.
| | | | | |
C) It appears very near the north celestial pole.
| | | | | | | | |
,D) It is the star directly on your northern horizon.
| | | | | | | | |
E) It can be used to determine your longitude on Earth. - CORRECT ANSWER✔✔-C
| | | | | | | | | | | | |
If the Moon is setting at 6 A.M., the phase of the Moon must be
| | | | | | | | | | | | | |
A) first quarter.
| |
B) third quarter.
| |
C) full.
| |
D) new.
|
E) waning crescent. - CORRECT ANSWER✔✔-C
| | | | |
Kepler's second law, which states that as a planet moves around its orbit it
| | | | | | | | | | | | | |
sweeps out equal areas in equal times, means that
| | | | | | | |
A) a planet travels faster when it is nearer to the Sun and slower when it is
| | | | | | | | | | | | | | | | |
farther from the Sun. | | | |
B) a planet's period does not depend on the eccentricity of its orbit.
| | | | | | | | | | | |
C) planets that are farther from the Sun move at slower average speeds than
| | | | | | | | | | | | | |
nearer
planets.
D) the period of a planet does not depend on its mass.
| | | | | | | | | | |
E) planets have circular orbits. - CORRECT ANSWER✔✔-A
| | | | | | |
What would happen if the Space Shuttle were launched with a speed greater
| | | | | | | | | | | | |
than Earth's escape velocity?
| | |
A) It would travel away from Earth into the solar system.
| | | | | | | | | | |
,B) It would travel in a higher orbit around Earth.
| | | | | | | | |
C) It would take less time to reach its bound orbit.
| | | | | | | | | |
D) It would orbit Earth at a faster velocity.
| | | | | | | |
E) It would be in an unstable orbit. - CORRECT ANSWER✔✔-A
| | | | | | | | | |
At which lunar phase(s) are tides least pronounced (e.g., the lowest high tides)?
| | | | | | | | | | | | |
A) first quarter
| |
B) new Moon
| |
C) full Moon
| |
D) both new and full Moons
| | | | |
E) both first and third quarters - CORRECT ANSWER✔✔-E
| | | | | | | |
At the centre of the Sun, fusion converts hydrogen into
| | | | | | | | | |
A) hydrogen compounds.
| |
B) Plasma.
|
C) radiation and elements like carbon and nitrogen.
| | | | | | |
D) radioactive elements like uranium and plutonium.
| | | | | | |
E) helium, energy, and neutrinos - CORRECT ANSWER✔✔-E
| | | | | | |
Grass appears green because
| | |
A) it emits green light and absorbs other colours.
| | | | | | | |
B) it absorbs green light and emits other colours.
| | | | | | | |
C) it transmits green light and emits other colours.
| | | | | | | | |
, D) it reflects green light and absorbs other colours - CORRECT ANSWER✔✔-D
| | | | | | | | | | |
If you heat a gas so that collisions are continually bumping electrons to higher
| | | | | | | | | | | | | |
energy levels, when the electrons fall back to lower energy levels the gas
| | | | | | | | | | | | |
produces
A) thermal radiation.
| |
B) an absorption line spectrum.
| | | | |
C) an emission line spectrum.
| | | | |
D) X-rays.
|
E) radio waves. - CORRECT ANSWER✔✔-C
| | | | |
We can learn a lot about the properties of a star by studying its spectrum. All of
| | | | | | | | | | | | | | | | |
the following statements are true except one. Which one?
| | | | | | | |
A) The peak of the star's thermal emission tells us its temperature: Hotter stars
| | | | | | | | | | | | | |
peak at shorter (bluer) wavelengths.
| | | |
B) The total amount of light in the spectrum tells us the star's radius.
| | | | | | | | | | | | | |
C) We can identify chemical elements present in the star by recognizing patterns
| | | | | | | | | | | | |
of
spectral lines that correspond to particular chemicals.
| | | | | |
D) We can look at Doppler shifts of spectral lines to determine the star's speed
| | | | | | | | | | | | | | |
toward or |
away from us. - CORRECT ANSWER✔✔-B
| | | | |
The nebular theory of the formation of the solar system successfully predicts all
| | | | | | | | | | | | |
but one of the following. Which one does the theory not predict?
| | | | | | | | | | |
