The Solar System

Front

The period of revolution is the _____________________.

Back

time it takes a planet to orbit the sun.

Front

The farther a planet's orbit is from the Sun, it takes _____________________.

Back

the longer it takes to orbit the Sun.

Front

The force that holds all objects in the solar system together is _____________.

Back

gravity.

Front

Which planet is NOT considered a gas giant?

Back

Venus.

Front

Which of the following statements about gravity in the Solar System is true?

Back

Gravity keeps the planets in orbit around the Sun.

Front

What is the main source of light and heat in the Solar System?

Back

The Sun.

Front

What are the four terrestrial planets in the Solar System?

Back

Mercury, Venus, Earth, Mars.

Front

What is the difference between rotation and revolution?

Back

Rotation is the spinning of a planet on its axis; revolution is the orbiting of a planet around the Sun.

Front

What is an asteroid belt?

Back

A region in space between Mars and Jupiter where many asteroids are found.

Front

What is a comet?

Back

A small icy body that, when passing close to the Sun, heats up and begins to release gases, forming a glowing coma and tail.