Week 33: Solar System Quiz

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Across
  1. 4. The biggest explosion human eyes has ever seen.
  2. 7. Our sun is classified as a _________
  3. 8. This brings the dust and gas together into planets
  4. 10. What element fuses together with hydrogen to generate energy during the main sequence stage?
  5. 11. This theory hypothesizes that planets mostly rotate in the same direction
  6. 12. This is the process stars perform in their cores.
Down
  1. 1. Atoms of an element with different numbers of neutrons.
  2. 2. These planets are made mostly of rock and metal
  3. 3. Radioactive decay of an isotope leads to a formation of a stable________ isotope
  4. 5. These are the remains after a supernova
  5. 6. Our Sun is a ________ ______
  6. 9. One way a star is classified
  7. 11. A giant cloud of dust and gas in space