1. On an H-R Diagram, what is the main sequence?

It shows the temp. and brightness of a star.

2. What percentage of stars are main sequence stars?

90 %

3. Is the Sun a main sequence star?

Yes it is.

4. What will happen to the Sun next? When will this happen?

It will have a nova in the next 5.5 billion years.

5. Include a picture of an H-R Diagram. Explain it.

On the x-axis goes from hot to cold. On the y-axis it goes from dim to bright.