1) Nuclear fusion occurs inside the core of stars where extreme pressure and heat cause hydrogen atoms to fuse together, forming helium and releasing energy. 2) The temperature in a star's core is over 15 million kelvins and the density is over 150 times greater than water, creating the conditions for nuclear fusion. 3) During nuclear fusion, the nuclei of hydrogen atoms combine to form helium, releasing a large amount of energy in the process. This energy flows outward from the core, balancing the inward force of gravity in the star.

1. Nuclear Fusion in Stars
1.2c
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2. Meaningful Class Participation and Effort
Category 3 2 1 0
Quality of Provides work of the Provides high quality Provides work that Provides work that
highest quality. work. occasionally needs to be usually needs to be
Work checked/redone. checked/ redone to
ensure quality
Focus on Consistently stays Focuses on the task and Focuses on the task and Rarely focuses on the
focused on the task and what needs to be done what needs to be done task and what needs to
the Task what needs to be done. most of the time. Other some of the time. Other be done. Lets others do
Very self directed. group members can group members must the work.
count on this person. sometimes nag, prod,
and remind to keep this
person on task.
Preparedn Brings needed Almost always brings Almost always brings Often forgets needed
materials to class and is needed materials to needed materials but materials or is rarely
ess always ready to work. class and is ready to sometimes needs to ready to get to work.
work. settle down and get to
work.
Effort Work reflects an Work reflects a strong Work reflects some Work reflects very little
excellent effort from effort from this student. effort from this student. effort on the part of this
this student. student.

3. ACHIEVE
South High School
Activity • INDEPENDENT STUDENT
WORK
Conversation • Level 2 - soft conversation.
Help • Ask neighbor. If he/she doesn't
know, then raise your hand
Integrity • Do your own work!
Effort • Work on task with notebook
open.
Value • Concepts in notes reinforced.
Efficiency • Read instructions. Use notes &
examples in notebook.

4. Nuclear Fusion in Stars
• Stars such as the sun are basically
hot balls of hydrogen and helium gas
that emit light.
• They are held together by the
enormous gravitational forces caused
by their own mass.
• Inside the core of a star, these forces
create a harsh environment, with
pressure more than a billion times the
atmospheric pressure on Earth.
Video
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5. Nuclear Fusion in Stars
• Inside the core of a star, these forces
create a harsh environment, with
pressure more than a billion times the
atmospheric pressure on Earth.
• The temperature is hotter than 15
million kelvins, and the density is
over 150 times greater than that of
water.
Video
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6. Nuclear Fusion in Stars
• The temperature is hotter than 15
million kelvins, and the density is
over 150 times greater than that of
water.
• In extreme conditions, nuclear fusion
reactions combine the nuclei of
hydrogen atoms into helium with a
release of energy.
• This energy flows outward,
balancing the inward pull of gravity.
Video
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7. Nuclear Fusion in Stars Fission in Power Plant
• Nuclear fusion is an • Nuclear fission is the
atomic reaction that fuels process used in the
stars. production of nuclear
• In fusion, many nuclei power.
(the centers of atoms) • Fission involves splitting
combine together to make the nucleus of a heavy
a larger one (which is a atom, such as uranium.
different element). • This yields two or more
• The result of this process lighter nuclei and a large
is the release of a lot of amount of energy.
energy.
• The resultant nucleus is
smaller in mass than the
sum of the ones that made
it; the difference in mass
is converted into energy.
Video
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8. Nuclear Fusion in Stars Fission in Power Plant
• Nuclear fusion is an • Nuclear fission is the
atomic reaction that fuels process used in the
stars. production of nuclear
• In fusion, many nuclei power.
(the centers of atoms) • Fission involves splitting
combine together to make the nucleus of a heavy
a larger one (which is a atom, such as uranium.
different element). • This yields two or more
• The result of this process lighter nuclei and a large
is the release of a lot of amount of energy.
energy.
• The resultant nucleus is
smaller in mass than the
sum of the ones that made
it; the difference in mass
is converted into energy.
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9. Make a Fission
poster of
each.
Label your
Fussion posters.
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