Starter: What is the Herztsprung- Russell Diagram, and how is it used to classify stars? 2/22-25/ /22-25/2013 Exit: Why do you think the sun is so important in our solar system? H R Diagram Application/Application: Finish HR Diagram Activity with questions Turn in when done 1/21/15 Practice: Universal address H R Diagram

January 21, 2015 AGENDA Objective 8.8C Describe components of the universe, including stars, nebulae, and galaxies, and use models such as the Herztsprung-Russell diagram for classification by taking notes and completing a graph. January 21, 2015 AGENDA Objective 8.8C Describe components of the universe, including stars, nebulae, and galaxies, and use models such as the Herztsprung-Russell diagram for classification by taking notes and completing a graph. 1. Starter 2. Notes 3 Activity 4. Exit

12/16 Light Years /17 Formation of the Universe /18 Big Bang /19 Early Astronomers and Light year Writing /7 Waves and the EM Spectrum /8 Wavestown EM Writing and Quiz Galaxies Counting Galaxies Lives of Stars Characteristics of Stars H-R Diagram Table of Contents

H-R Diagram Main-sequence Stars Main Sequence stars fall into the an area from the upper left corner to the lower right corner of the H-R diagram The hottest are blue or blue-white and are in the upper left corner of the diagram The cool, dim stars are red in the lower right corner.

Starter: What is the Herztsprung- Russell Diagram, and how is it used to classify stars? 2/22-25/ /22-25/2013 Exit: Why do you think the sun is so important in our solar system? H R Diagram Application/Application: Finish HR Diagram Activity with questions Turn in when done 1/21/15 Practice: Universal address H R Diagram