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OpenStem
@openstem · Joined Jul 2026
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Quiz4 questions
What is the main difference between an asteroid and a comet?
AAsteroids are rocky; comets are icyBAsteroids are icy; comets are rockyCThere is no differenceDComets are planets
Astronomy · L1 · Asteroids, Comets, and Meteors Quiz
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Astronomy · L1 · Asteroids, Comets, and Meteors QuizQuiz4 questions
What is gravity?
AA force that pushes objects apartBA force that pulls objects toward each otherCA kind of lightDA type of gas
Astronomy · L1 · Gravity Quiz
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Astronomy · L1 · Gravity QuizQuiz4 questions
Why do rockets need so much fuel?
ATo keep the astronauts warmBTo create enough thrust to escape Earth's strong gravityCTo make the rocket heavier for stabilityDFuel isn't actually needed
Astronomy · L1 · Rockets Quiz
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Astronomy · L1 · Rockets QuizQuiz4 questions
Why do astronauts wear spacesuits outside their spacecraft?
ATo look impressiveBBecause there is no air to breathe and extreme temperatures outsideCTo swim more easilyDSpacesuits are not actually needed
Astronomy · L1 · Astronauts Quiz
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Astronomy · L1 · Astronauts QuizQuiz4 questions
What does a telescope mainly do?
AMakes new starsBCollects more light than our eyes canCChanges the color of the skyDMoves stars closer
Astronomy · L1 · Telescopes Quiz
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Astronomy · L1 · Telescopes QuizQuiz4 questions
Why is Earth sometimes called the 'Goldilocks planet'?
AIt is the biggest planetBIt is just the right distance from the Sun for liquid waterCIt has the most moonsDIt is the closest planet to the Sun
Astronomy · L1 · Why Earth Is Special Quiz
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Astronomy · L1 · Why Earth Is Special QuizQuiz4 questions
What mainly causes Earth's seasons?
AEarth's changing distance from the SunBEarth's tilted axisCThe Moon's phasesDClouds blocking sunlight
Astronomy · L1 · The Four Seasons Quiz
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Astronomy · L1 · The Four Seasons QuizQuiz4 questions
What is the International Space Station?
AA satellite with no crewBA giant orbiting spacecraft where astronauts live and workCA telescope on the MoonDA weather balloon
Astronomy · L1 · The Space Station Quiz
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Astronomy · L1 · The Space Station QuizQuiz4 questions
Who were the first two people to walk on the Moon?
ANeil Armstrong and Buzz AldrinBMichael Collins and Neil ArmstrongCTwo robotsDA crew of four astronauts
Astronomy · L1 · Humans on the Moon Quiz
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Astronomy · L1 · Humans on the Moon QuizQuiz4 questions
What causes a meteor shower?
AThe Moon explodingBEarth passing through a trail of comet dustCThe Sun sending out sparksDAirplanes flying at night
Astronomy · L1 · Meteor Showers Quiz
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Astronomy · L1 · Meteor Showers QuizQuiz4 questions
What causes an aurora?
ALightning from thunderstormsBCharged particles from the Sun colliding with atmosphere gasesCLight reflecting off the MoonDCity lights bouncing off clouds
Astronomy · L1 · Northern Lights (Auroras) Quiz
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Astronomy · L1 · Northern Lights (Auroras) QuizQuiz4 questions
Which of these is a natural satellite?
AA GPS satelliteBA weather satelliteCEarth's MoonDA TV satellite
Astronomy · L1 · Satellites: Natural & Artificial Quiz
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Astronomy · L1 · Satellites: Natural & Artificial QuizQuiz4 questions
Why is Mars called the 'Red Planet'?
AIt is covered in red lavaBRusted iron-rich dust covers its surfaceCIts atmosphere is redDIt reflects red light from the Sun
Astronomy · L1 · Mars Exploration Quiz
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Astronomy · L1 · Mars Exploration QuizQuiz4 questions
How can you usually tell a planet from a star in the night sky?
APlanets are always brighter than starsBPlanets shine steadily; stars tend to twinkleCPlanets only appear in the morningDStars are always red
Astronomy · L1 · Finding Stars & Planets in the Sky Quiz
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Astronomy · L1 · Finding Stars & Planets in the Sky QuizQuiz4 questions
What does one 'year' actually measure?
AHow long the Moon takes to orbit EarthBThe time Earth takes to travel once around the SunCHow long a day lastsDHow fast Earth spins
Astronomy · L1 · Why a Year Has 365 Days Quiz
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Astronomy · L1 · Why a Year Has 365 Days QuizQuiz4 questions
Why is Venus sometimes called Earth's 'twin'?
AIt has oceans just like EarthBIt is close to Earth in size and made of similar rockCPeople can breathe its airDIt orbits the Sun at the same speed as Earth
Astronomy · L1 · Venus, Earth's Unfriendly Twin Quiz
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Astronomy · L1 · Venus, Earth's Unfriendly Twin QuizQuiz4 questions
Who proposed that the Sun, not Earth, is the center of the solar system?
APtolemyBNicolaus CopernicusCIsaac NewtonDNeil Armstrong
Astronomy · L1 · Astronomers Who Changed How We See the Sky Quiz
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Astronomy · L1 · Astronomers Who Changed How We See the Sky QuizQuiz4 questions
What is Artemis?
ANASA's program to return humans to the MoonBA robotic rover on MarsCA telescope orbiting EarthDThe name of the first Moon landing in 1969
Astronomy · L1 · Artemis: Returning to the Moon Quiz
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Astronomy · L1 · Artemis: Returning to the Moon QuizQuiz6 questions
Which planet is the largest in the Solar System?
ASaturnBJupiterCEarthDNeptune
Astronomy · L1 · Jupiter, the Giant Planet Quiz
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Astronomy · L1 · Jupiter, the Giant Planet QuizQuiz6 questions
Which planet is famous for its bright rings?
AMarsBSaturnCMercuryDVenus
Astronomy · L1 · Saturn's Rings Quiz
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Astronomy · L1 · Saturn's Rings QuizQuiz6 questions
What happens during a solar eclipse?
AEarth's shadow falls on the MoonBThe Moon passes between the Sun and EarthCThe Sun passes behind EarthDThe Moon disappears
Astronomy · L1 · Solar and Lunar Eclipses Quiz
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Astronomy · L1 · Solar and Lunar Eclipses QuizQuiz5 questions
What is the Milky Way?
AA single bright starBOur home galaxyCA cometDA cloud in Earth's atmosphere
Astronomy · L1 · Spotting the Milky Way Quiz
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Astronomy · L1 · Spotting the Milky Way QuizQuiz6 questions
What is a black hole?
AA hole burned into a planetBA place where gravity is so strong that not even light escapesCA very dark cloud of dustDAn empty patch of space with nothing in it
Astronomy · L1 · Black Holes Quiz
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Astronomy · L1 · Black Holes QuizQuiz5 questions
Which two planets are called the 'ice giants'?
AJupiter and SaturnBUranus and NeptuneCMars and VenusDMercury and Pluto
Astronomy · L1 · Neptune and Uranus Quiz
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Astronomy · L1 · Neptune and Uranus QuizQuiz3 questions
Where are new stars born?
AInside existing stars that explodeBIn giant clouds of gas and dust called nebulaeCFrom planets that become hot enoughDAt the centre of galaxies only
Astronomy · L2 · Star Life Cycles and Eclipses
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Astronomy · L2 · Star Life Cycles and EclipsesQuiz2 questions
What is the correct order of the first four planets from the Sun?
AEarth, Mars, Mercury, VenusBMercury, Venus, Earth, MarsCVenus, Mercury, Mars, EarthDMars, Earth, Venus, Mercury
Astronomy · L2 · The Solar System
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Astronomy · L2 · The Solar SystemQuiz4 questions
According to Kepler's First Law, what shape are planetary orbits?
APerfect circlesBEllipses, with the Sun at one focusCStraight linesDSpirals that slowly shrink
Astronomy · L2 · Kepler's Laws of Planetary Motion
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Astronomy · L2 · Kepler's Laws of Planetary MotionQuiz4 questions
Why doesn't a planet fall straight into the Sun?
AThe Sun's gravity is too weak to pull it inBIt has sideways speed that keeps carrying it forward as gravity curves its pathCSpace has no gravityDThe planet is too heavy for gravity to move
Astronomy · L2 · Gravity and Orbital Motion
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Astronomy · L2 · Gravity and Orbital MotionQuiz4 questions
What does one astronomical unit (AU) equal?
AThe distance from Earth to the MoonBThe average distance from Earth to the SunCThe width of the Milky WayDThe distance light travels in one year
Astronomy · L2 · The Scale of the Universe
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Astronomy · L2 · The Scale of the UniverseQuiz4 questions
Which condition does Pluto fail to meet for full planet status?
AIt doesn't orbit the SunBIt isn't roundCIt hasn't cleared other objects out of its orbital neighbourhoodDIt has no moons
Astronomy · L2 · Dwarf Planets and the Kuiper Belt
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Astronomy · L2 · Dwarf Planets and the Kuiper Belt