1.  How Many Stars are in our Solar System???? a.Hundreds b.Millions c.Billions Explain why you chose the answer you picked.

2.  Copy the Sun Notes in your Practice Section.

4. One star is inside our Solar System – The Sun The Sun is : -Medium size -Yellow -Dwarf Star

5.  Diameter= 1,392,000 km  5 billion years old  Distance from the Sun = 1AU ◦ AU is Astronomical Unit = 149,600,000 km

6.  Corona – ◦ Visible with only special equipment ◦ Can extend 10-12 times the diameter of the sun  Chromosphere – ◦ Below corona ◦ 3,000 km thick ◦ Visible only with special equipment

7.  Photosphere ◦ Visible by naked eye – The Part We See! ◦ 600km thick  Convective Zone ◦ Convection currents of suns gases ◦ 200,000 km thick

8.  Radiative Zone ◦ 300,000 km thick ◦ Extremely dense – light takes millions of years to pass through  Core ◦ Where all suns energy is produced ◦ 200,000km thick ◦ 15,000,000°C

9. - Just like the Earth, The Sun spins on its axis - The Sun gives off ultraviolet rays - Suns light takes 8 minutes to reach Earth

10. - Galileo was the first scientist to explore and observe the sun - Satellites help us get valuable data from the sun

11. Sunspots ◦ are cooler areas on the sun – on the photospere ◦ Can affect the Earths weather

12.  Solar Flare ◦ Giant storms on the suns surface that send huge electrically charged particles into the Solar System

13.  Made of Hydrogen that fuses to Helium  Gravity pulls the sun into the shape of a sphere.

14.  Assemble the Layer of the Sun Foldable and place it in the Application Section of your journal.

15.  Why do you think the Earth stays in orbit around the sun?  What do you think would happen if the Earth was no longer orbiting around the sun?  7 Sentence Summary of what we learned. DO NOT GIVE A LIST OF OUR AGENDA!!!!!  Include questions you still have of the sun.