Transcript Today’s Objectives - Manchester High School

Welcome to Science 12/3
• Turn in HW & pick up a Ch. 19 Section 2 packet
next to the tray. Read the Section Summary on
Page 3 and then begin answering the questions
on Page 4.
• Today’s Schedule
• 1. Science News
• 2. Question of the Day
• 3. The Sun
Question of the Day
• What object is the central figure that provides
most of the energy and provides the most
gravity that maintains the balance and order of
the solar system to which the Earth belongs?
• The sun
What caused this?
What caused this?
What caused this?
What do you know about the sun?
The Sun:
Our Very Own Star
The Sun
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1 of billions of stars
99% of the mass of the solar system
Rotates every 27 days
Center of the solar system “heliocentric”
100% a giant ball of gas
330,000 times bigger than Earth
74% hydrogen, 24% helium, 2% other gasses
27 million degrees F.
If you weighed 100 lbs. on Earth, you would
weigh 2,800 lbs. on the sun.
Welcome to Science 12/6
Get out your sun packet and make sure you
check the word wall for new words.
• Today’s Schedule
• 1. This week’s schedule
• 2. Question of the Day
• 3. Finish Discussion on The Sun and complete
Stormy Sunspot Lab
Question of the Day
Brought to you by: Brett Thomas
• In the morning the temperature of the gym was
68 F. In the evening the temperature of the gym
was 78 F. Throughout the day there was a
wrestling tournament in the gym. What explains
the dramatic rise in temperature?
• Thermal Energy: As the activity and attendance
in the gym increased so did the temperature.
I. Structure of the Sun
• Like Earth, the sun
also has different
parts.
• The sun is not solid.
• The sun is 100%
gas.
• Like Earth, the sun
has convection
currents.
II. Energy of the Sun
• The sun is 4.6 billion yrs. old.
• How does it burn and stay so hot for so long?
• It is not only burning, but the sun is also shrinking due
to gravity.
• The burning and energy created by gravity would only
supply enough energy for the sun to last only 45
million years.
• How does the sun continue to shine?
II. Energy of the Sun
• Nuclear Power !!!!!!!!!!!!!!!
• The sun is also powered
by nuclear fusion.
• Nuclear Fusionprocess in which 2 or
more nuclei join together
(fuse) to form a massive
nucleus.
• The result is an
enormous amount of
energy.
• Nuclear Fusion Animation
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Fusion in the Sun!
III. Activity on the Sun’s Surface
• Photosphere is where
action takes place on the
sun’s surface.
• Sunspots- cooler, dark
spots on the sun caused
by slowing convection
currents
III. Activity on the Sun’s Surface
• Solar Flares- giant
storms on the surface
of the sun that have
temps up to 5 million
degrees C.
• Solar flares can
interrupt radio signals
and affect satellites in
orbit.
• X6