The Solar System

Front

What are comets made of?

Back

Comets are made of ice and rock.

Front

What is at the center of the solar system?

Back

The sun is at the center of the solar system.

Front

Which planet is closest to the sun?

Back

Mercury is the closest planet to the sun.

Front

What is 1 Astronomical Unit?

Back

1 Astronomical Unit is the distance between Earth and the Sun.

Front

Which two planets are nearest to the sun?

Back

Venus and Mercury are the two planets nearest to the sun.

Front

What is the largest planet in the solar system?

Back

Jupiter is the largest planet in the solar system.

Front

What is the main component of the sun?

Back

The sun is primarily made of hydrogen and helium.

Front

What are the inner planets?

Back

The inner planets are Mercury, Venus, Earth, and Mars.

Front

What are the outer planets?

Back

The outer planets are Jupiter, Saturn, Uranus, and Neptune.

Front

What is a planet?

Back

A planet is a celestial body that orbits a star and is large enough to be rounded by its own gravity.