Astronomy - Planets

The sun contains 99.9% of the mass of the entire solar system

• true
• false

One revolution on Earth equals

• one day
• one year
• one month
• one week

Name all the inner planets in order:

• Mars, Venus, Earth, Mercury
• Mercury, Venus, Earth
• Mercury, Venus, Earth, Jupiter
• Mercury, Venus, Earth and Mars

The largest planet in our solar system is...

• Uranus
• Jupiter
• 
  Neptune
• 
  Mercury

The inner and outer planets are separated by...

• a wall
• the asteroid belt
• Earth's moon
• Pluto

An asteroid is best described as:

• a star
• a burning ball of gas
• a small rocky body orbiting the sun
• a large rocky ball surrounded by gas

A comet is best described as:

• a frozen ball of dust and organic debris
• a ball of dirt and maple syrup
• a snowball
• a snowball that moves at a high velocity

Which planet is closer to the sun than Earth?

• Saturn
• Jupiter
• Mars
• Mercury

The "red planet" is

• Venus
• Uranus
• Mars
• Saturn

The planet with the most spectacular rings of any planet is

• Jupiter
• Saturn
• Uranus
• Neptune