About this Study Set
This study set covers Physical Science through
15 practice questions.
Test your knowledge of space, planets, and the universe with these fact-based questions. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 15 questions from the
Cosmic Facts: A Physical Science Quiz study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
What is the primary component of the Sun, making up approximately 74% of its mass?
-
A
Helium
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B
Oxygen
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C
Hydrogen
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D
Carbon
2
Which planet in our solar system is known for its prominent rings, composed mainly of ice particles and dust?
-
A
Jupiter
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B
Saturn
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C
Uranus
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D
Neptune
3
What phenomenon causes the Earth's magnetic field, protecting us from harmful solar wind?
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A
Convection currents in the mantle
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B
The movement of molten iron in the outer core
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C
The gravitational pull of the Moon
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D
The reflection of sunlight off the atmosphere
4
The Great Red Spot on Jupiter is a persistent storm that has been observed for centuries. What gas is believed to be responsible for its distinct red color?
-
A
Methane
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B
Ammonia
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C
Sulfur compounds
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D
Nitrogen
5
Which of the following is the closest star to Earth, besides our Sun?
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A
Sirius
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B
Alpha Centauri A
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C
Proxima Centauri
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D
Barnard's Star
6
What is the term for a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it?
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A
Nebula
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B
Quasar
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C
Pulsar
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D
Black hole
7
Which terrestrial planet has the highest average surface temperature in our solar system?
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A
Mercury
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B
Venus
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C
Earth
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D
Mars
8
The process by which stars generate energy is called nuclear fusion. What element is primarily fused into helium during this process in stars like our Sun?
-
A
Carbon
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B
Oxygen
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C
Hydrogen
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D
Iron
9
What celestial bodies are remnants of stars that have exhausted their nuclear fuel and collapsed, often resulting in a dense core?
-
A
Comets
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B
Asteroids
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C
White dwarfs
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D
Meteoroids
10
Which planet is tilted on its side at an axial tilt of approximately 98 degrees, causing extreme seasonal variations?
-
A
Saturn
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B
Uranus
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C
Neptune
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D
Mars
11
What is the name of the galaxy that contains our solar system?
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A
Andromeda Galaxy
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B
Triangulum Galaxy
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C
Milky Way Galaxy
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D
Whirlpool Galaxy
12
The distance light travels in one year is known as a light-year. What is the approximate speed of light in a vacuum?
-
A
300,000 kilometers per hour
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B
300,000 kilometers per second
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C
150,000 miles per hour
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D
150,000 miles per second
13
What is the name given to a celestial body consisting of a nucleus of ice and dust and, when near the Sun, a ‘tail’ of gas and dust particles pointing away from the Sun?
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A
Asteroid
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B
Meteor
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C
Comet
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D
Planetoid
14
Which layer of the Sun's atmosphere is the outermost layer, visible during a solar eclipse as a faint halo?
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A
Photosphere
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B
Chromosphere
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C
Corona
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D
Radiative Zone
15
The expansion of the universe is evidenced by the redshift of light from distant galaxies. What does redshift indicate?
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A
Galaxies are moving towards us
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B
Galaxies are moving away from us
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C
Galaxies are stationary
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D
The universe is contracting
