planets
PLANETS
moons
Space Stuff
Space Missions
100

Which planet rotates sideways?

Uranus 

100

Which planet has the lowest density and thousands of rings? 

Saturn

100

Which moon is closest to Jupiter and volcanically active?

Io

100

Which experiments found no conclusive evidence of life on Mars?

Viking Probes 

100

Which mission discovered Jupiter's faint dust ring?

Voyager space probes 

200

Which planet is the closest to the sun?

Mercury 

200

Which planet is sometimes called Earth's twin because it is similar in mass and size?

Venus 

200

Which moon is the largest in our solar system?

Ganymede 

200

What is the "Great Red Spot" and where is it located?

The GRS is the largest continuous storm of high-pressure gas on Jupiter 

200

How many moons did the Voyager space probes discover Neptune has?

11

300

Which planet appears reddish-yellow due to iron oxide in its rocks?

Mars 

300

Which planet is about 150 million kilometers from the sun?

Earth

300

Which planet does the moon Titan belong to?

Saturn 

300

This is composed of dust and rock particles mixed with frozen water, methane, and ammonia.

Comet 

300

What is the "Great Dark Spot?"

Continuous storm on Neptune that was discovered by the Voyager space probes.

400

Methane gives which two planets their bluish-green color?

Uranus and Neptune 

400

Which planet has great temperature extremes due to its lack of atmosphere?

Mercury 

400

What are the names of Mars' two moons and which is larger?

Phobos is larger than Deimos 

400

This is a piece of rock similar to the material that formed the planets.

Asteroid 

400

Which mission discovered a volcano on Jupiter's moon Io?

Voyager Space Probes 

500

Which planet is very hot with sulfuric acid in its clouds?

Venus 

500

Which planet is USUALLY eighth from the sun?

Neptune 

500

What is the most volcanically active object in our entire solar system?

Io

500

These are pieces of dust and rock from a comet's nucleus 

Meteoroids 

500

Why are the inner planets solid and rocky?

They formed closer to the sun, so the lighter elements vaporized in the heat. 

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