Star Temperature vs. Color Lab10/15

1) Do Now: 1) What are the different star colors? 2) Which color star is the hottest?

3) How can scientists determine the temperature and chemical make up of stars from Earth?

2)Spectrometers- How to use…

3)Lab Groups- Random Generator

4)HW: 1) Any part of the lab you have not completed in class!!

Which color is which element?

PotassiumBarium

calcium Copper Lithium Sodium

Spectra: fingerprint of stars

Which elements are present in the star above?

Which element is NOT present in this star?

The spectrum of a distant star contains sodium lines that are offset from their normal position, as shown. What is the most likely explanation?

A. The star is relatively hot. B. The star is relatively cool. C. The star is moving rapidly toward us. D. The star is moving rapidly away from us.

Hertzsprung-Russel Diagram