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Mars - Coggle Diagram

- - - - water
        
        planet needs water to support life
        
        only liquid water delivers nutrients to living cells & dissolve waste
    - - x trap heat like Earth
        
        average temp. is below zero
        
        water mainly locked up as ice
  - - - plants & other organisms can breathe CO2
      - impossible for creatures like humans to breathe
        
        some microorganisms on Earth can live in cold with little or no O2
  - - - dark streaks during summer but x during winter
        
        streaks = flowing streams of water
        
        most places still frozen even in summer
        
        streams filled with chemicals
        
        keep them flowing in cold temp.
        
        possibility of life
  - - - did Mars once support life?
        
        difficult to say when - Mars is 4b years old
- - - - Ancient Romans named it after god of war
  - - - created by an advanced society?
        
        canals = optical illusions caused by telescope lenses
  - - - loads of new info about Mars' climage & geology
        
        surface covered in iron oxide (known as rust) - looks red
        
        massive dust storms covers the entire planet
- - - - 4th planet from the Sun (Earth - 3rd)
        
        similar tilt, four seasons
        
        terrestrial, made of rocks & minerals
        
        canyons & mountains, poles with ice caps