Search form

Colors of the Universe

Answer Key

  1. Red light has the longest wavelengths.
  2. Rusted iron dust particles in its atmosphere make Mars red.
  3. On a cloudy day, the ocean appears gray.
  4. White light is made up of all the other colors.
  5. Earth's atmosphere contains nitrogen, oxygen, pollution, and water.


© 2001 by Education World®. Permission is granted to teachers to reproduce this page for classroom use.