Chapter 28/29 crossword - Ella B

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Across
  1. 4. The sun is the nearest star to ______.
  2. 5. The ____ planets are the 4 planets closest to the sun.
  3. 6. a rule that correctly describes a natural phenomenon.
  4. 8. notice that all the other galaxies were moving away from us.
  5. 10. a hypothesis that is supported by the results of experimentation and observation
Down
  1. 1. The _______ galaxies were moving faster than the closer ones.
  2. 2. Who observed the doppler effect in space?shorter when a light source is moving toward an observer,the wavelengths appear ______.
  3. 3. When a light source is moving away from observer, the wavelengths appear ________.
  4. 7. As a nebula shrinks under the influence of gravity, it spins ______
  5. 8. The sun is mostly composed of _______ in the plasma phase.
  6. 9. The _____ planets are the 4 planets farest away from the sun.