Inner planets
Outer planets
The sun
Asteroids, Meteors, and Comets
100

What is the closest planet from the sun?

Mercury

100

What is the biggest planet?

Jupiter

100

What is the name of our star?

The sun or Sol

100

What is a comet?

An icy and dusty rock that orbits the Sun.

200

Which inner planet has one moon?

Earth

200

What are gas giants?

Large planets composed mainly of gasses

200

What is the sun made of?

Hydrogen and Helium 

200

Where are most asteroids located?

In the asteroid belt

300

True or False: All inner planets have solid surface

True

300

Which planets are called "gas giants"?

Jupiter and Saturn

300

What causes solar flares?

A sudden release of energy near sun spots.

300

What two planets is the asteroid belt in-between?

Mars and Jupiter

400

What are Venus's clouds made of?

 Sulfuric acid

400

Which planet takes the longest to orbit the sun?

Neptune

400

What is the sun's diameter?

1.392 million km

400

What causes meteor showers?

When Earth passes through the debris trail left behind by a comet or an asteroid.

500

Why does Mercury have such an extreme temperature difference between its day and night sides?

It has almost no atmosphere to trap heat or give insulation.

500

What is the primary composition of Jupiter's atmosphere?

Hydrogen 

500

True or False: The sun is big

Either is correct

500

Is a comet an asteroid?

NO!

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