Science hw

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Across
  1. 4. as galaxies become ____ they will drift apart and stop forming stars
  2. 5. A cluster or group of galaxies can be made up of smaller ______ and galaxies.
  3. 7. if the universe stops expanding it will _____
  4. 8. Every object in the universe is part of a larger ______
Down
  1. 1. Scientists can check the age of the _____ by checking the size of it
  2. 2. Scientists think the universe may expand _____
  3. 3. the prevailing scientific model for the origin of the universe and explosion that started the universe known as the _____
  4. 6. the science of the origin and development of the universe