SCIN261 quiz 1
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School
American Public University *
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Course
261
Subject
Astronomy
Date
Apr 3, 2024
Type
Pages
5
Uploaded by 32denny
Quiz 1 (Weeks 1 & 2) - Results
Attempt 1 of 1
Written Dec 11, 2023 1:02 PM - Dec 11, 2023 1:10 PM
Attempt Score
100 / 100 - 100 %
Overall Grade (Highest Attempt)
100 / 100 - 100 %
Question 1
10 / 10 points
Astronomers discover a new object in our solar system, orbiting perpendicular to the
ecliptic plane. This object is most likely a(n)
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Question 2
10 / 10 points
What are comets mostly made of?
asteroid.
comet.
planet.
trans-Neptunian object.
All known asteroids, planets, and trans-Neptunian objects orbit in or near the Earth's
ecliptic plane. Only comets have been observed with orbits nearly perpendicular to
the ecliptic plane. These comets usually originate from the Oort cloud.
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Question 3
10 / 10 points
The two most abundant elements in the sun are
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Question 4
10 / 10 points
The Sun generates energy via
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Hydrogen
Ice
Iron
Rock
Comets mostly made of ice.
hydrogen and helium.
iron and silicon.
nitrogen and oxygen
hydrogen and oxygen
The Sun is made up almost entirely of the gases hydrogen and helium.
chemical burning.
gravitational collapse.
nuclear fission.
nuclear fusion.
Question 5
10 / 10 points
In a solar system with a central star that is ten times hotter than our Sun, one would
expect the distances over which terrestrial planets formed to be __________ ours.
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Question 6
10 / 10 points
The total mass of the planets is comparable to that of the Sun.
True
False
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Question 7
10 / 10 points
What kind of star is the Sun?
Energy is generated in the core of the Sun via nuclear fusion. Due to the higher
temperatures and pressures, protons are forced so closely together that they "stick"
together, fusing into a heavier nucleus. Through a series of steps, four protons (or
hydrogen nuclei) fuse into one helium nucleus, with energy being created in the
process.
less than
the same as
greater than
It would depend on other factors as well.
In this solar system, the central star gives off more energy, heating the solar system
more. This causes the region where water begins to condense out as ice to be farther
from the star. This is the boundary between the terrestrial and Jovian planets.
The Sun contains 99.8 percent of the mass of the entire solar system.
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