Solar system

Gravity makes Earth revolve around the

Sun. Revolve means ______

• to have no movement

• travel in a closed path

• spin on an axis

• move up and down

Which of these describes rotation?

• The Moon goes around Earth every 28 days

• Earth orbits the Sun about every 365 days

• Earth makes one turn on its axis every 24 hours

• Mercury goes around the Sun every 88 days.

Which is true of stars and planets?

• Stars move through the sky, but planets do not.

• Stars are the brightest objects in the night sky.

• It is easier to see planets than stars because planets glow with heat.

• Stars and planets both move.

A star's color tells us about its___________

• temperature

• size

• rotation

• distance from Earth

"A group of objects in space that orbit a star in the center, plus the star itself" best defines which of the following terms?

• solar system

• galaxy

• universe

• asteroid belt

Name the outer planets in the correct order.

• Jupiter, Saturn, Uranus, Neptune

• Mercury, Venus, Earth, Mars

• Saturn, Jupiter, Uranus, Neptune

• Mercury, Earth, Mars, Venus

Which planet is known for its giant "red spot"?

• Mars

• Jupiter

• Uranus

• Venus

In one year, Earth ________ around the sun.

• rotates

• revolves

• move

• jump

Inner and outer planets differ in many ways. Which of the following is not true?

• Inner planets are smaller than outer planets.

• Inner planets are called the rocky planets, while outer planets are known as the Gas Giants.

• Outer planets have no rings, while the inner planets all have rings.

• The inner planets have fewer moons than the outer planets.

Which term can be described as "Everything that exists in space"?

• galaxy

• solar system

• constellations

• universe