1. Formation of the Sun and
its Balance of inward and
outward forces
1.2d
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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. Formation of stars/sun
1. Thin invisible cloud of gas and dust collapsed
inward, pulled by the force of its own gravity.
2. As the clouds fell together, it began to spin and
the smaller the cloud got, the faster it spun.
3. The center of the cloud reached a temperature
of 15 million kelvins after about 30 million
years after the cloud started to collapse.
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5. Formation of stars/sun
3. The center of the cloud reached a temperature
of 15 million kelvins after about 30 million
years after the cloud started to collapse.
4. Under these extreme conditions protons move
rapidly, pressed closer together.
5. Through the process of fusion, the protons
combine with a release of energy.
6. The star/sun was born at that moment fusion
ignites the stars/sun.
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6. Balance of Inward and Outward Forces
1. The fusion reactions in the core of the stars
produce an outward force that prevents the star
from collapsing.
2. If this outward force is not checked it would
make the star expand and eventually
disintegrate or explode.
3. When stars use up most of its gas due to fusion,
it’s mass will decrease and its gravity will
weaken.
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7. Balance of Inward and Outward Forces
4. On the other hand the gravity produces an
inward force preventing the star from
expanding and disintegrating.
5. With those two forces evenly balanced, the
stars maintain an equilibrium.
6. Scientists estimate that the sun has enough fuel
to continue nuclear fusion for another 5 billion
years.
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8. Video 2
Video 2
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