Space Review

Which is the 3rd planet from the sun?

• Mars

• Jupiter

• Earth

• Venus

Which is the 1st planet from the sun?

• Venus

• Earth

• Mercury

• Mars

The image shown represents which Moon phase?

• Waxing gibbous
• Waning gibbous
• Waning crescent
• Waxing crescent

Which of the following is true?

• Earth is the center of the solar system
• The sun orbits the earth
• Gravity exists only on Earth
• The sun is the center of the solar system

How long is Earth's rotation?

• one day
• one year
• one decade
• one hour

Why do planets orbit the sun (and not float around in space)?

• the moons are keeping them in place
• They were hit by an asteroid
• they were hit by a comet
• the sun's gravity keeps them in place

An object that revolves around another object in space (natural or manmade)

• mirror

• microscope

• oscilloscope

• satellite

How many planets are there?

• 6
• 7
• 8
• 9

The Sun, eight planets, and thousands of stars make up the 

• outer planets
• inner planets
• solar system
• light years

Which is the correct order of the inner planets?

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