Astro1 UCSB Final Practice Exam 2025 With Questions
And Correct Answers/ Astro1 Final Exam 2025 Prep
Questions With 100% Correct Answers Graded A UCSB
(Latest)
A THEORY is a pattern in nature thought to have predictive power. The test of a
theory is a prediction. That's where pseudo-science fails. T/F - ans -T
Red giant stars are powered by hydrogen burning in a shell surrounding a core,
which has been depleted of hydrogen. T/F - ans -T
Jovian planets have densities similar to that of water, and we know in fact that
they are mostly made of water. T/F - ans -F - Jovian planets are gaseous
The Sun appears to circle the Celestial Sphere in one year because the Earth is
circling the Sun. The Sun's apparent path is called the horizon. T/F - ans -F - it's
called the ecliptic
The Cosmic Microwave Background has a blackbody spectrum. T/F - ans -T
Old streambeds and other topographic features indicate that Mars once had
liquid water on its surface. T/F - ans -T
A good example of a positive feedback effect in global warming is that melting sea
ice causes a decrease in the Earth's albedo, meaning we absorb more sunlight
than ever. T/F - ans -T
While the heavy elements have been cooked-up in stars, several of the light
elements and isotopes were made in the first few minutes of the Big Bang. T/F -
ans -T
How is the transparency of Earth's atmosphere changing in infrared light? - ans -
its decreasing
A pulsar is - ans -a rapidly rotating neutron star, emitting beams of radio and
sometimes x-ray and visible energy.
, How does the ultraviolet transparency of Earth's atmosphere today compare with
its natural, pre-industrial value? - ans -its greater
The Moon's orbital period and its rotation period are the same. Therefore, - ans -
people on Earth always see the same half of the Moon.
How do red giants of 0.2 solar masses differ from those of 1.0 solar mass? - ans -
There aren't any of them, so the question is moot.
Suppose the Universe is 14 billion years old. If we observe a galaxy 10 billion light
years away, how old was the Universe at the time the light we see left that
galaxy? - ans -4 billion years old
The fact that virtually all galaxies are receding from us implies that - ans -the
Universe is expanding
The final stage in the evolution of a low-mass star is a - ans -white dwarf
Captain Picard wishes to send a message to a Ferengi ship, which is located
behind a large dust cloud. In order to ensure the best possible transmission he
sends - ans -radio waves
Suppose Hubble's constant is 100 km/sec/Mpc (this is not the currently accepted
value). What would the approximate age of the universe be in this case? You may
assume a constant expansion rate. - ans -COME BACK
The gravitational acceleration on the Earth's surface is ~10 m/s2 . What would it
be on the surface of a planet with the same size, but one-half the mass? - ans -
COME BACK
Why does hydrogen "burning" by fusion reactions only occur in the deep interiors
of the Sun (and other stars)? - ans -Because the requisite conditions of high
temperature and high density only occur there.
And Correct Answers/ Astro1 Final Exam 2025 Prep
Questions With 100% Correct Answers Graded A UCSB
(Latest)
A THEORY is a pattern in nature thought to have predictive power. The test of a
theory is a prediction. That's where pseudo-science fails. T/F - ans -T
Red giant stars are powered by hydrogen burning in a shell surrounding a core,
which has been depleted of hydrogen. T/F - ans -T
Jovian planets have densities similar to that of water, and we know in fact that
they are mostly made of water. T/F - ans -F - Jovian planets are gaseous
The Sun appears to circle the Celestial Sphere in one year because the Earth is
circling the Sun. The Sun's apparent path is called the horizon. T/F - ans -F - it's
called the ecliptic
The Cosmic Microwave Background has a blackbody spectrum. T/F - ans -T
Old streambeds and other topographic features indicate that Mars once had
liquid water on its surface. T/F - ans -T
A good example of a positive feedback effect in global warming is that melting sea
ice causes a decrease in the Earth's albedo, meaning we absorb more sunlight
than ever. T/F - ans -T
While the heavy elements have been cooked-up in stars, several of the light
elements and isotopes were made in the first few minutes of the Big Bang. T/F -
ans -T
How is the transparency of Earth's atmosphere changing in infrared light? - ans -
its decreasing
A pulsar is - ans -a rapidly rotating neutron star, emitting beams of radio and
sometimes x-ray and visible energy.
, How does the ultraviolet transparency of Earth's atmosphere today compare with
its natural, pre-industrial value? - ans -its greater
The Moon's orbital period and its rotation period are the same. Therefore, - ans -
people on Earth always see the same half of the Moon.
How do red giants of 0.2 solar masses differ from those of 1.0 solar mass? - ans -
There aren't any of them, so the question is moot.
Suppose the Universe is 14 billion years old. If we observe a galaxy 10 billion light
years away, how old was the Universe at the time the light we see left that
galaxy? - ans -4 billion years old
The fact that virtually all galaxies are receding from us implies that - ans -the
Universe is expanding
The final stage in the evolution of a low-mass star is a - ans -white dwarf
Captain Picard wishes to send a message to a Ferengi ship, which is located
behind a large dust cloud. In order to ensure the best possible transmission he
sends - ans -radio waves
Suppose Hubble's constant is 100 km/sec/Mpc (this is not the currently accepted
value). What would the approximate age of the universe be in this case? You may
assume a constant expansion rate. - ans -COME BACK
The gravitational acceleration on the Earth's surface is ~10 m/s2 . What would it
be on the surface of a planet with the same size, but one-half the mass? - ans -
COME BACK
Why does hydrogen "burning" by fusion reactions only occur in the deep interiors
of the Sun (and other stars)? - ans -Because the requisite conditions of high
temperature and high density only occur there.
