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Unit 3: Work, Machines, and Energy

Grade Level:
8
Subject:
Physical Science
Understandings:
1. “The use of science to accomplish good works is an important reason for studying sciences.” * (Ephesians 2:10)
Skill Goals:
The student will…
1. Determine when work is being done on an object.
2. Calculate the amount of work done on an object.
3. Explain the difference between work and power.
4. Explain how a machine makes work easier.
5. Describe and give examples of the force-distance trade-off that occurs when a machine is used.
6. Calculate mechanical advantage.
7. Explain why machines are not 100% efficient.
8. Identify and give examples of the six types of simple machines.
9. Analyze the mechanical advantage provided by each simple machine.
10. Identify the simple machines that make up a compound machine.
11. Explain the relationship between energy and work.
12. Describe an energy conversion.
13. Explain the law of conservation of energy.
14. Compare kinetic and potential energy.
15. Describe the different forms of energy.
16. Define heat as thermal energy transferred between objects at different temperatures.
17. Compare conduction, convection, and radiation; citing examples of each.

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