Addie Ricker

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Across
  1. 2. The solar system consists of _ _ _.
  2. 3. According to the nebular theory, the Sun and planets formed together from a cloud of gas and dust _ _ _ _ _ _.
  3. 7. between materials in the cloud pulled it inward _ _ _ _ _ _ _ _ _ _ _.
  4. 9. Planets are divided into two classes _ _ _ _ _.
  5. 10. The Sun is the nearest star to _ _ _ _ _.
Down
  1. 1. The _ _ _ _ _ _ _ _ cloud conformed to the shape of a spinning disk.
  2. 4. When the cloud was pulled inward, its spin increased in _ _ _ _ _ _ _ _ _ _ with the conservation of angular momentum.
  3. 5. _ _ _ _ _ _ _ _ is fused to helium by thermonuclear fusion in the Sun's core.
  4. 6. Planets are divided into two classes _ _ _ _ _.
  5. 8. A _ _ _ _ fraction of this energy reaches and sustains Earth.