1. Chapter 5 Lesson 1: The Sun

2. What is the Sun? A star which produces its own energy (light) There are stars which can make ten million times what the sun makes Our sun is an average sized star Our sun can hold more than a million earths

3. The sun is made of mostly two gases, hydrogen and helium

4. Sunspots are regions on photosphere which have a lower temperature than the other regions

5. What are the parts of the sun? -Radiation layer next to core moves energy in all directions -Convection layer gases move in circles -Photosphere is visible surface -Chromosphere inner layer of the sun’s atmosphere, red circle around sun -Corona outermost layer

6. Solar flares are bursts of heat and energy coming off the sun

7. How does the sun produce energy? Albert Einstein discover relationship between energy and mass E=mc2 E energy, m mass, c speed of light

8. Inside the sun, hydrogen particles smash together to make helium (fusion)

9. Review Questions What is the largest object in our solar system? An object in the solar system that produces heat and light is a _______________. What causes energy to be released inside the sun? How would earth be affected if the sun stopped producing energy? Why are the planets not stars? Why do you think it take millions of years for energy that moves in every direction to leave the radiation layer? What happens when hydrogen particles collide?