Chapter 7 Review Test

All of the outer planets have which of the following?

• just moons

• both moons and ring systems

• none of the these; Saturn has rings while the rest have moons

• just ring systems

Which planet is third from the sun?

• Mercury

• Venus

• Earth

• Mars

Why didn't a planet form in the asteroid belt?

• Jupiter's gravity may have been too great

• Some of the asteroids were too hot

• The asteroids moved too slowly

• It was too cold

Why did the artists for both of these illustrations above feel it necessary to represent the inner planets with a pulled out piece?

• It is a more dramatic representation.

• The distances between the planets in the inner part of the solar system are so great that drawing everything on the same scale makes it impossible to represent the outer planets.

• They thought it was prettier.

• The distances between the planets in the outer part of the solar system are so great that drawing everything on the same scale makes it impossible to represent the inner planets.

Which of the following is a common trait for the inner planets?

• They are the same size.

• They all have water.

• The atmospheres are made up of the same gases.

• They all have a solid outer layer.

Venus and Earth experience a ___ because of heat trapped by their atmospheres.

• greenhouse effect

• cloud cover

• slow rotation

• cooling effect

About how many times farther is Saturn from the Sun than Jupiter is?

• 2 times as far

• 4.38 times as far

• 5.2 times as far

• 6 times as far

What is the basic astronomical unit based on?

• The distance Earth, the planet the scientists live on, is from the Sun.

• The distance Neptune, the farthest planet, is from the Sun.

• The distance Mercury, the closest planet, is from the Sun.

• 1,000,000,000 km

The order of the inner planets outward from the Sun is ___.

• Mercury, Earth, Venus, and Mars

• Mars, Venus, Earth, and Mercury

• Mercury, Venus, Earth, and Mars

• Earth, Venus, Mars, and Mercury

Why is Venus the hottest planet?

• gases and ice

• Earth and the Sun

• Because of the greenhouse effect

• solid