H-R Diagram Lab

Question 1: How many distinct groupings of plots ("dots") do you see on your H-R Diagram?

Question 2: Using the Stefan-Boltzmann relationship, determine the relative sizes of the groups you identified.

(a) Which group must contain larger stars? Explain your reasoning for this conclusion.

(b) Which group must contain smaller stars? Explain your reasoning for this conclusion.

Question 3: On your H-R Diagram, find the Main Sequence. Can you find which dot represents the Sun?

Question 4: If you answered "YES," how did you determine which dot represents the Sun? If you answered "NO," why could you not determine which dot represents the Sun?

Question 5: What is the relationship between temperature and color?

Question 6: What is the relationship between temperature and absolute brightness?

Question 7: How can we tell red giant stars are very large in diameter by looking at their location on the H-R Diagram?