Stars are mostly made of:
  • hydrogen
  • helium
  • oxygen
  • nitrogen
Stars shine because of:
  • kinetic energy
  • nuclear energy
  • gravitational energy
  • mechanical energy
Which of these are the hottest stars?
  • red
  • orange
  • yellow
  • blue
What temperature is our sun compared to other stars?
  • very hot
  • hot
  • medium
  • cool
How long will our sun continue to shine?
  • 1 billion years
  • 3 billion years
  • 5 billion years
  • 7 billion years
How long is one light year?
  • 9.06 trillion km's
  • 9.62 trillion km's
  • 9.64 trillion km's
  • 9.46 trillion km's
How does a galaxy stay together?
  • movement
  • gravity
  • heat
  • pressure
What type of stars do we mostly find in an irregular galaxy?
  • old stars
  • young stars
  • small stars
  • large stars
What shape is an elliptical galaxy?
  • round
  • disc
  • spiral
  • american football
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