Planet Power
Moving Through Space
What's in the Sky?
Galaxy Quest
Space Rocks & Ice
100

Small, rocky planet that is closest to the Sun.

What is Mercury?

100

The predictable path an object takes as it revolves around the Sun.

What is an Orbit?

100

The closest star to planet Earth.

What is the Sun?

100

A large grouping of stars in space.

What is the Galaxy?

100

When a chunk of space rock enters Earth's atmosphere and burns up, it creates a streak of light in the sky.

What is a Meteor, or A Shooting Star?

200

Any of the large celestial bodies that revolve around the Sun in the solar system.

What are Planets?

200

This force keeps the planets in orbit around the Sun and stops us from floating off Earth.

What is gravity?

200

A celestial body that revolves around a planet.

What is the Moon?

200

A large ball of gas in space that produces its own light and heat.

What is a Star?

200

The region between Mars and Jupiter where many asteroids are found.

What is the Asteroid Belt?

300

These four planets are called the "gas giants" because they are made mostly of gas and are much larger than the inner planets. Name two of them.

What are Jupiter & Saturn?

300

A ball of ice, dust, and rock that forms a tail as it approaches the Sun.

What is a Comet?

300

The name of the galaxy that Earth is in.

What is the Milky Way?

300

A system of planets and other bodies that orbit a star.

What is the Solar System?

300

Which of the following space rocks is most likely to leave a huge crater if it hits Earth? 

What is an Asteroid?

400

Planets with solid cores and rocky surfaces.

What are Inner Planets?

400

It's not a planet, but this space object can crash into Earth and leave a crater. Some are small as pebbles, others as big as houses.

What is a meteoroid or meteor?

400

A group of stars that form a pattern

What is a Constellation?

400

A region in space with gravity so strong not even light can escape.

What is a Black Whole?

400

The solid, frozen core of a comet, often described as a "dirty snowball".

What is the nucleus?

500

Planets that are large, gaseous, and most distant from the Sun.

What are Outer Planets?

500

This rare event happens when one space object moves in front of another and blocks its view.

What is an eclipse?

500

A huge explosion at the end of a star's life.

What is a SuperNova?

500

This is the name for the invisible boundary around a black hole. Once something crosses it, it cannot escape-not even light.

What is the event horizon?

500

An irregularly shaped rocky or metallic object that orbits the Sun and is much smaller than a planet.

What is an Asteroid?

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