Intro to Astronomy Final Exam (2024 / 2025) Actual Questions and Verified Answers, 100% Guarantee Pass
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Course
Astronomy
Institution
Astronomy
Intro to Astronomy Final Exam (2024 / 2025) Actual Questions and Verified Answers, 100% Guarantee Pass According to our modern science, which of the following best explains why the vast
majority of the mass of our solar system consists of hydrogen and helium gas?
A. Hydrogen and helium are produc...
Intro to Astronomy Final Exam.pdf file:///C:/Users/HP/Desktop/dddd/Intro%20to%20Astronomy%20Fin
Intro to Astronomy Final Exam Actual
Questions & Answers
1. According to our modern science, which of the following best explains why the vast
majority of the mass of our solar system consists of hydrogen and helium gas?
A. Hydrogen and helium are produced in stars by nuclear fusion.
B. Hydrogen and helium are the most common elements throughout the universe,
because they were the only elements present when the universe was young.
C. All the other elements were swept out of the solar system by the solar wind.
D. All the other elements escaped from the solar nebula before the Sun and planets
formed.
Answer B. Hydrogen and helium are the most common elements throughout the universe,
because they were the only elements present when the universe was young.
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2. What do we mean by the frost line when we discuss the formation of planets in the solar
nebula?
A. It is another way of stating the temperature at which water freezes into ice.
B. It is a circle at a particular distance from the Sun, beyond which the
temperature was low enough for ices to condense.
C. It marks the special distance from the Sun at which hydrogen compounds become
abundant; closer to the Sun, there are no hydrogen compounds.
D. It is the altitude in a planet's atmosphere at which snow can form.
Answer B. It is a circle at a particular distance from the Sun, beyond which the temperature was
low enough for ices to condense.
3. Many meteorites appear to have formed very early in the solar system's history. How
do these meteorites support our theory about how the terrestrial planets formed?
A. The meteorites sizes are just what we'd expect if metal and rock condensed and accreted
as our theory suggests.
B. The meteorites appearance and composition is just what we'd expect if metal and
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rock condensed and accreted as our theory suggests
C. Their appearance and composition matches what we observe in comets today,
suggesting that meteorites were once pieces of icy planetesimals.
D. Their overall composition is just what we believe the composition of the solar
nebula to have been mostly hydrogen and helium.
Answer B. The meteorites
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appearance and composition is just what we'd expect if metal and rock condensed and accreted
as our theory suggests
4. According to our present theory of solar system formation, which of the following
objects now reside quite far from the place where they formed originally?
A. Oort cloud comets.
B. asteroids of the asteroid belt.
C. Kuiper belt comets.
D. The terrestrial planets.
Answer A. Oort cloud comets.
5. Why are the inner planets made of denser materials than the outer planets?
A. In the inner part of the nebula only metals and rocks were able to condense because of
the high temperatures, whereas hydrogen compounds, although more abundant, were
only able to condense in the cooler outer regions.
B. In the beginning, when the protoplanetary disk was spinning faster, cen- trifugal
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