QUESTION 1

View the HR diagram linked above (HR Diagram.jpg)

What is the horizontal axis label?

What units is the horizontal axis is measured in (full word, please)?

List the spectral types in order along the horizontal axis from left-to-right (no spaces)

What is the vertical axis label?

What units is the vertical axis measured in? (full text, please)?

QUESTION 4

1. View the HR diagram pictured in the link below:

HR Diagram.jpg

Notice in the diagram the regions numbered 1 through 4.

What type of stars inhabit each region?

Region 1:

Region 2:

Region 3:

Region 4: