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 during a total eclipse appears as a white colored halo ◦ Corona means crown in latin ◦ Corona extends into space for millions of kilometers ◦ Solar winds are millions of streams of electrically charged particles ◦ Visible with only special equipment ◦ Can extend 10-12 times the diameter of the sun

7.  Chromosphere – ◦ The middle layer of the suns atmosphere ◦ It is visible during a total eclipse ◦ The Greek word Chroma means color ◦ Below corona ◦ 3,000 km thick ◦ Visible only with special equipment

8.  Photosphere ◦ First layer of the Sun’s atmosphere ◦ The sun does not have a solid surface, but instead when you are looking at the sun, you are looking at the photosphere ◦ The photosphere is considered to be the Sun’s surface layer. ◦ Visible by naked eye – The Part We See! ◦ 600km thick

9.  Convective Zone ◦ Outermost layer of the sun’s interior ◦ Hot gas rises and then sinks here ◦ The loops formed by sinking cool gas causes energy to move towards the sun’s surface ◦ Convection currents of suns gases ◦ 200,000 km thick

10.  Radiative Zone ◦ Region of very tightly packed gas where energy moves mainly in the form of electromagnetic radiation ◦ It can take energy up to 100,000 years to move through the radiation zone. ◦ 300,000 km thick ◦ Extremely dense – light takes millions of years to pass through

11.  Core ◦ First layer in the sun’s interior ◦ Enormous amounts of energy are produced here through nuclear fusion. ◦ Nuclear fusion is hydrogen atoms join to make helium atoms ◦ 200,000km thick ◦ 15,000,000°C

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

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

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

15.  Solar Flare  Giant storms on the suns surface that send huge electrically charged particles into the Solar System  Prominences ◦ an eruption of a flamelike tongue of relatively cool, high-density gas from the solar chromosphere into the corona where it can be seen during a solar eclipse or by observing strong spectral lines in its emission spectrum.solar eclipse

16.  Solar Flares ◦ a brief powerful eruption of particles and intense electromagnetic radiation from the sun's surface, associated with sunspots and causing disturbances to radio communication on earth  Solar Winds ◦ from the sun's corona consisting of a flow of charged particles, mainly electrons and protons, that interacts with the magnetic field of the earth and other planetary bodies.

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

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

19.  Why do you think the Earth stays in orbit around the sun?  What do you thin would happen if the Earth was no longer orbiting around the sun?

20.  7 Sentence Summary of what we learned. DO NOT GIVE A LIST OF OUR AGENDA!!!!!  Include questions you still have of the sun.