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Inner Planets (Grade 9)

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Inner Planets

Which of the following is considered the 'Red Planet?'
  1. Mars
  2. Earth
  3. Venus
  4. Mercury
Which planet is known as "Earth's Twin?"
  1. Saturn
  2. Mars
  3. Uranus
  4. Venus
Which planet is 1.00 au from the Sun?
  1. Mercury
  2. Earth
  3. Neptune
  4. Mars
How many moons does Mars have?
  1. 5
  2. 10
  3. 20
  4. 2
What is the gas that makes up most of the Martian atmosphere?
  1. nitrogen
  2. oxygen
  3. carbon dioxide
  4. water vapor
Which describes Mercury's position in the solar system?
  1. innermost terrestrial planet
  2. innermost Jovian planet
  3. outermost terrestrial planet
  4. outermost Jovian planet
Mercury is thought to be composed of approximately 30%                                   and approximately 70%                                  .
  1. rocky material; water
  2. water; metallic material
  3. rocky material; metallic material
  4. water; gases
Why is it unlikely that life as we know it exists on Venus?

List some facts about Mars.

Why is it important that Earth is located the perfect distance from the Sun?

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