1. Stars are made up mostly of what two elements?

2. What process allows stars to produce so much heat and energy?

3. What do we call it when a large star collapses and creates a massive nuclear explosion?

4. Which stage in the life cycle of a star lasts the longest?

5. What do we call a giant cloud of space dust that will someday form into a star?

6. What do we call a star that has ran out of hydrogen and expanded?

7. What type of star is the Sun?

8. What type of star is very small and dense and was created by the collapse of a giant star?

9. What type of star is the most common star in the universe?

10. What color are the largest stars?