solar system

• give components of our solar system

  one star and eight planets, dwarf planets and moon that orbit the star
• give order of lifecycle of smaller star

  1. nebula
  2. protostar
  3. main sequence star
  4. red giant
  5. white dwarf
  6. black dwarf
• give order of lifecycle of bigger star

  1. nebula
  2. protostar
  3. main sequence star
  4. red super giant
  5. supernova
  6. neutron star / black hole
• describe nebula


  cloud of dust and gas
• describe protostar


  gravity pulls dust and gas together that increases temp and pressure when nuclear fusion starts to occur
• describe main sequence star

  outward pressure of nuclear fusion reactions balances inward pressure of gravity for long stable periods of time
• describe red giant 


  hydrogen runs out so nuclear fusion stops so star collapses and start nuclear fusion of helium due to increase in temp
• describe white dwarf 


  nuclear fusion of helium stops and star shrinks
• describe black dwarf 


  cools and stops releasing any energy
• describe red super giant

  hydrogen runs out and nuclear fusion of helium begins
• describe supernova


  nuclear fusion stops and star explodes and elements heavier than iron are produced and distributed
• describe neutron star 


  densely packed core of neutrons
• describe black hole 


  dense point that light cannot escape from
• describe motion of orbiting

  constant speed, changing direction, changing velocity, accelerating
• describe process of orbiting

  instantaneous velocity held in orbit by force of gravity
• describe affect of increased radius of orbit on speed

  decrease speed