Download The Sun - Judson ISD

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How Many Stars are in our Solar System????
a. Hundreds
b. Millions
c. Billions
Explain why you chose the answer you picked.
Copy the Sun Notes in your Practice Section.
One star is inside our Solar System –
The Sun is :
-Medium size
-Dwarf Star
Diameter= 1,392,000 km
5 billion years old
Distance from the Sun = 1AU
◦ AU is Astronomical Unit = 149,600,000 km
Corona –
◦ Visible during a total
eclipse appears as a
white colored halo
◦ Corona means crown in
◦ Corona extends into
space for millions of
◦ Solar winds are millions
of streams of electrically
charged particles
◦ Visible with only special
◦ Can extend 10-12 times
the diameter of the sun
Chromosphere –
◦ The middle layer of the suns
◦ It is visible during a total
◦ The Greek word Chroma
means color
◦ Below corona
◦ 3,000 km thick
◦ Visible only with special
◦ 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
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
Radiative Zone
◦ Region of very tightly packed gas where energy
moves mainly in the form of electromagnetic
◦ 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
◦ 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
Just like the Earth, The Sun spins on its axis
The Sun gives off ultraviolet rays
Suns light takes 8 minutes to reach Earth
Galileo was the first scientist to explore and
observe the sun
Satellites help us get valuable data from the
◦ are cooler areas on the sun – on the photospere
◦ Can affect the Earths weather
Solar Flare
Giant storms on the suns surface that send huge
electrically charged particles into the Solar System
◦ 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 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.
Made of Hydrogen that fuses to Helium
Gravity pulls the sun into the shape of a
Assemble the Layer of the Sun Foldable and
place it in the Application Section of your
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?
7 Sentence Summary of what we learned. DO
Include questions you still have of the sun.