MSU ISP 205 EXAM 1, 2 AND 3 UPDATED 2026 ACTUAL (3 VERSIONS EXAMS)
MOST TESTED Questions and CORRECT Answers GUARANTEED PASS
All but one of the following statements explain why scientists doubt the solar
sunspot cycle affects global climate. Identify which statement is irrelevant to the
explanation. - VERIFIED ANSWER✅ Solar winds can affect satellite
communications.
How do we test our computer models for the interior of the Sun? - VERIFIED
ANSWER✅ Comparing model predictions to how the Sun actually vibrates.
If the gas pressure in the Sun's core lessens, then what happens to the core
according to gravitational equilibrium and energy conservation? - VERIFIED
ANSWER✅ Core shrinks and heats up.
How do we know there are nuclear reactions occurring in the Sun? - VERIFIED
ANSWER✅ We detect solar neutrinos.
Generally speaking, how does the surface temperature and luminosity of a
protostar compare to the surface temperature and luminosity of the main-
sequence star it becomes? - VERIFIED ANSWER✅ A main-sequence star is
hotter and dimmer than it was as a protostar.
,Consider a large molecular cloud that will give birth to a cluster of stars. Which of
the following would you expect to be true? - VERIFIED ANSWER✅ A few massive
stars will form, live, and die before the majority of the star's clusters even
complete their protostar stage.
We do not know for certain whether the general trends we observe in stellar birth
masses also apply to brown dwarfs. But if they do, then which of the following
would be true? - VERIFIED ANSWER✅ Brown dwarfs would outnumber all
ordinary stars.
Where would a brown dwarf be located on an H-R diagram? - VERIFIED
ANSWER✅ below and to the right of the lowest part of the main sequence
Which of the following types of data provide evidence that helps us understand the
life tracks of low-mass stars? - VERIFIED ANSWER✅ H-R diagrams of globular
clusters
If a star has a mass of 10 solar masses and a luminosity of 10,000 solar
luminosities, how long is its lifetime? (The Sun's life time is 10 billion years.) -
VERIFIED ANSWER✅ 10 million years
How do we know the mass of Neptune? - VERIFIED ANSWER✅ The period and size
of the orbits of the moons around Neptune.
,How do we estimate the surface temperature of a star? - VERIFIED ANSWER✅
By obtaining its spectrum and classifying the spectral type.
Which of the following statements best explains why the planets orbit in nearly a
single plane and in the same
direction around the Sun? - VERIFIED ANSWER✅ The planets formed from a disk
of rotating gas.
Why are rocky planets close to the Sun and gas giants
farther out? - VERIFIED ANSWER✅ Because the center of the solar nebula was
too hot for
hydrogen ices to form.
What is the leading scenario for the formation of the
Moon? - VERIFIED ANSWER✅ It formed from the material ejected in a giant
impact.
Why did the solar nebula heat up as it collapsed? - VERIFIED ANSWER✅ As the
cloud shrank, its gravitational potential energy was converted to kinetic energy
and then into thermal energy
, Why do asteroids and comets differ in composition? - VERIFIED ANSWER✅
Asteroids formed inside the frost line, while comets
formed outside.
If the freezing point of ices of all types was at a much
lower temperature, what change would that imply for the
formation of our solar system? - VERIFIED ANSWER✅ The gas giants would have
to form at a larger distance.
Which of the following observations of an extrasolar
planet system would be inconsistent with our theory of planet
formation? - VERIFIED ANSWER✅ a system in which all the planets orbit in
completely different planes
The habitable zone is defined as a region around a star
where ... - VERIFIED ANSWER✅ planets could have liquid water on their surface.
Which of these observations would suggest the presence
of a planet orbiting a star? - VERIFIED ANSWER✅ A slight decrease in the
brightness of a star that repeats
MOST TESTED Questions and CORRECT Answers GUARANTEED PASS
All but one of the following statements explain why scientists doubt the solar
sunspot cycle affects global climate. Identify which statement is irrelevant to the
explanation. - VERIFIED ANSWER✅ Solar winds can affect satellite
communications.
How do we test our computer models for the interior of the Sun? - VERIFIED
ANSWER✅ Comparing model predictions to how the Sun actually vibrates.
If the gas pressure in the Sun's core lessens, then what happens to the core
according to gravitational equilibrium and energy conservation? - VERIFIED
ANSWER✅ Core shrinks and heats up.
How do we know there are nuclear reactions occurring in the Sun? - VERIFIED
ANSWER✅ We detect solar neutrinos.
Generally speaking, how does the surface temperature and luminosity of a
protostar compare to the surface temperature and luminosity of the main-
sequence star it becomes? - VERIFIED ANSWER✅ A main-sequence star is
hotter and dimmer than it was as a protostar.
,Consider a large molecular cloud that will give birth to a cluster of stars. Which of
the following would you expect to be true? - VERIFIED ANSWER✅ A few massive
stars will form, live, and die before the majority of the star's clusters even
complete their protostar stage.
We do not know for certain whether the general trends we observe in stellar birth
masses also apply to brown dwarfs. But if they do, then which of the following
would be true? - VERIFIED ANSWER✅ Brown dwarfs would outnumber all
ordinary stars.
Where would a brown dwarf be located on an H-R diagram? - VERIFIED
ANSWER✅ below and to the right of the lowest part of the main sequence
Which of the following types of data provide evidence that helps us understand the
life tracks of low-mass stars? - VERIFIED ANSWER✅ H-R diagrams of globular
clusters
If a star has a mass of 10 solar masses and a luminosity of 10,000 solar
luminosities, how long is its lifetime? (The Sun's life time is 10 billion years.) -
VERIFIED ANSWER✅ 10 million years
How do we know the mass of Neptune? - VERIFIED ANSWER✅ The period and size
of the orbits of the moons around Neptune.
,How do we estimate the surface temperature of a star? - VERIFIED ANSWER✅
By obtaining its spectrum and classifying the spectral type.
Which of the following statements best explains why the planets orbit in nearly a
single plane and in the same
direction around the Sun? - VERIFIED ANSWER✅ The planets formed from a disk
of rotating gas.
Why are rocky planets close to the Sun and gas giants
farther out? - VERIFIED ANSWER✅ Because the center of the solar nebula was
too hot for
hydrogen ices to form.
What is the leading scenario for the formation of the
Moon? - VERIFIED ANSWER✅ It formed from the material ejected in a giant
impact.
Why did the solar nebula heat up as it collapsed? - VERIFIED ANSWER✅ As the
cloud shrank, its gravitational potential energy was converted to kinetic energy
and then into thermal energy
, Why do asteroids and comets differ in composition? - VERIFIED ANSWER✅
Asteroids formed inside the frost line, while comets
formed outside.
If the freezing point of ices of all types was at a much
lower temperature, what change would that imply for the
formation of our solar system? - VERIFIED ANSWER✅ The gas giants would have
to form at a larger distance.
Which of the following observations of an extrasolar
planet system would be inconsistent with our theory of planet
formation? - VERIFIED ANSWER✅ a system in which all the planets orbit in
completely different planes
The habitable zone is defined as a region around a star
where ... - VERIFIED ANSWER✅ planets could have liquid water on their surface.
Which of these observations would suggest the presence
of a planet orbiting a star? - VERIFIED ANSWER✅ A slight decrease in the
brightness of a star that repeats
