The Planets
The Sun, Moon & Stars
Rotation & Revolution
The Universe
Space Facts & Fun
100

This planet is closest to the Sun.

What is Mercury?

100

The Sun gives us this, which keeps Earth warm and bright.

What is light and heat?

100

Earth spins on this imaginary line.

What is its axis?

100

Our solar system is part of this giant collection of stars and planets.

What is the Milky Way Galaxy?

100

The Moon reflects this from the Sun so we can see it at night.

What is light?

200

This red planet is known for its dusty surface and volcanoes.

What is Mars?

200

The Moon’s pull on Earth’s oceans causes this to happen.

What are tides?

200

One full rotation of Earth causes this to happen.

What is day and night?

200

Scientists believe the universe began with a huge explosion called this.

What is the Big Bang?

200

The fifth planet from the Sun and the largest of all.

What is Jupiter?

300

This planet is the largest in our solar system.

What is Jupiter?

300

When the Moon seems to block the Sun, it’s called this.

What is a solar eclipse?

300

Earth takes one year to do this around the Sun.

What is a revolution?

300

The Sun, planets, and moons are all part of this system.

What is the Solar System?

300

Saturn, Uranus, and Neptune all have these around them.

What are rings?

400

This planet has beautiful rings made of ice and rock.

What is Saturn?

400

These are giant balls of burning gas far away in space.

What are stars?

400

The tilt of Earth’s axis causes these changes in weather.

What are the seasons?

400

A person who studies stars and planets is called this.

What is an astronomer?

400

The only planet known to have liquid water and life.

What is Earth?

500

These four planets are made of rock and are closest to the Sun.

What are Mercury, Venus, Earth, and Mars?

500

The Moon’s shape seems to change over a month because of this.

What are the phases of the Moon?

500

The Moon revolves around this object.

What is Earth?

500

Space beyond Earth’s atmosphere is called this.

What is outer space?

500

This tool helps scientists see planets and stars from far away.

What is a telescope?