1.2d formation of the sun and its balance of inward and outward forces
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Formation of the Sun and its Balance of inward and
outward forces1.2d
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Meaningful Class Participation and EffortCategory 3 2 1 0
Quality of Work
Provides work of the highest quality.
Provides high quality work.
Provides work that occasionally needs to be checked/redone.
Provides work that usually needs to be checked/ redone to ensure quality
Focus on the Task
Consistently stays focused on the task and what needs to be done. Very self directed.
Focuses on the task and what needs to be done most of the time. Other group members cancount on this person.
Focuses on the task and what needs to be done some of the time. Other group members must sometimes nag, prod, and remind to keep this person on task.
Rarely focuses on the task and what needs to be done. Lets others do the work.
Preparedness
Brings needed materials to class and is always ready to work.
Almost always brings needed materials to class and is ready to work.
Almost always brings needed materials but sometimes needs to settle down and get to work.
Often forgets needed materials or is rarely ready to get to work.
Effort Work reflects an excellent effort from this student.
Work reflects a strong effort from this student.
Work reflects some effort from this student.
Work reflects very little effort on the part of this student.
ACHIEVE South High School
•INDEPENDENT STUDENT WORK
Activity
•Level 2 - soft conversation.
Conversation
•Ask neighbor. If he/she doesn't know, then raise your hand
Help
•Do your own work!
Integrity
•Work on task with notebook open.
Effort
•Concepts in notes reinforced.
Value
•Read instructions. Use notes & examples in notebook.
Efficiency
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Video
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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Video
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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Video
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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Video
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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Video 2
Video 2