Download Chapter 5 Lesson 1: The Sun

Chapter 5
Lesson 1: The Sun
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
The sun is made of mostly two gases, hydrogen and helium
Sunspots are regions
on photosphere which have a
lower temperature than the other
regions
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
Solar flares are bursts of heat
and energy coming off the sun
How does the sun produce energy?
• Albert Einstein discover relationship between
energy and mass
• E=mc2
• E energy, m mass, c speed
of light
Inside the sun,
hydrogen
particles
smash
together to
make helium
(fusion)
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?