Mercury Planet Quiz
Easy multiple-choice quiz for kids about Mercury, the closest planet to the Sun.
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Quiz Questions & Answers
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Question 1: Which planet is closest to the Sun?
Mars
Venus
Mercury
Earth
Question 2: What is Mercury mostly made of?
Liquid ocean
Ice and snow
Gas like Jupiter
Rock and metal
Question 3: How many moons does Mercury have?
Two moons
Zero moons
Many moons
One moon
Question 4: What color does Mercury look from space?
Grayish brown
Purple and pink
Green and lush
Bright blue
Question 5: Why are there many craters on Mercury?
Because of heavy rain
Made by volcanoes yesterday
Alien digging
Hit by asteroids and comets
Question 6: How does one day on Mercury compare to one year on Mercury?
A day is longer than a year
A day is much shorter than a year
It has no days or years
A day and year are the same
Question 7: Can people live on Mercury without a spaceship?
Yes, it has nice weather
Maybe, if you bring plants
No, it is too hot and airless
Yes, you can breathe there
Question 8: What makes Mercury very hot on its daylight side?
Its many forests
Being very close to the Sun
A thick greenhouse
Warm oceans
Question 9: Does Mercury have seasons like Earth?
Yes, four strong seasons
Not really, seasons are weak
It has constant rain seasons
It has only winter
Question 10: Where can ice exist on Mercury?
In its atmosphere
On the bright equator
In permanently shadowed craters near poles
In lava lakes
Question 11: What tool do astronauts use to study Mercury from space?
Submarines
Hot-air balloons
Spacecraft missions
Trains
Question 12: Which planet is NOT between Mercury and Neptune?
Mars
Pluto
Venus
Earth
Question 13: Why doesn't Mercury have a thick atmosphere?
Its gravity is too weak and Sun strips gases
It rains the atmosphere away
Its atmosphere turned to rock
It is always covered by clouds
Question 14: What is a major feature seen on Mercury’s surface?
Tall green forests
Lots of impact craters
Large icebergs floating
Wide oceans
Question 15: From Earth, Mercury is hard to see because:
It is always below the horizon
It stays near the Sun in the sky
It hides behind clouds on Mercury
It is invisible to human eyes
Question 16: Which job studies planets like Mercury?
Chef
Planetary scientist
Farmer
Singer
Question 17: Which phrase best describes Mercury’s size?
Largest gas giant
Smallest rocky planet
Same size as Jupiter
Bigger than the Sun
Question 18: What happens to temperature on Mercury between day and night?
Temperatures swing extremely high and low
Temperatures stay the same all over
It only gets colder at noon
It slowly warms like Earth
Question 19: If you were an astronaut visiting Mercury, what would you need?
Spacesuit and spacecraft
Bicycle
A swimsuit
Umbrella
Question 20: Which statement about Mercury is a myth?
Mercury is very hot on the day side
Mercury orbits the Sun
Mercury has many craters
Mercury is covered in water