7.9.C: characteristics of Earth that allow life to exist

Analyze

THE CHARACTERISTICS OF EARTH IN OUR SOLAR SYSTEM THAT ALLOW LIFE TO EXIST

Including, but not limited to:

• Habitable zone – proximity to the Sun

  • Third planet from the Sun

  • Correct temperature

  • Amount of light for photosynthesis

• Presence of liquid water

• Composition of the atmosphere

  • High concentrations of critical gases

  • 78% nitrogen

  • 21% oxygen

  • 1% other