Unit 4&5 Review

Front

A force of attraction between any two objects is called _____________.

Back

gravity

Front

What is similar about all of the Outer Planets?

Back

large

Front

Put the planets in order from the sun.

Back

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto

Front

What is true of all planets in our Solar System?

Back

They are large bodies in space that orbit the Sun

Front

Earth is an inner planet that can have life.

Back

True

Front

An irregular, rocky body that orbits the sun but is too small to be classified as a planet is known as a:

Back

asteroid

Front

The planets revolve around the Sun while they rotate on their axes.

Back

True

Front

The Sun's gravitational force keeps the planets, their moons, and other space objects in ______________.

Back

fixed orbits

Front

What keeps each planet in orbit around the Sun?

Back

a balance of inertia and gravity

Front

In order for life as we know it to exist, a planet must have ______________________

Back

liquid water