Why life 1st evolved

• Distance from the Sun

  • too close = too hot temperature
  • too far away = too cold
  • Earth and Mars are in the Goldilocks Zone
• Speed of rotation

  • prevents temperature extremes
  • No rotation
  • one side constantly exposed to solar energy - too hot
  • One side is too dark and cold due to no solar energy = no photosynthesis
• Angle of rotation

  • creates seasonal variation that prevents temperature extremes to a lesser extent
• Mass

  • mass creates gravity
  • increased density = increased gravitational field
  • The gravity has to be enough to create an atmosphere
  • The stronger the gravitational field the closer the atmosphere gets to the planets surface so particles collide more, generating heat - the atmosphere boils easily
• Electromagnetic field

  • deflects waves of solar radiation from the Sun e.g. solar winds
  • It protects Earth from UV that damages DNA
  • When 2 fields interact the Aurora Borealis is observed
• What is it about Earth that first allowed life to evolved (compared to other planets)?

  • Distance from the Sun
  • Speed of rotation
  • Angle of rotation
  • Mass
  • Electromagnetic field