Alg HW

 Energy Content Standards 6.3 - Variations in the amount of the sun’s energy hitting the Earth’s surface affect daily and seasonal weather patterns. a) Local and regional weather are affected by the amount of solar energy these areas receive and by their proximity to a large body of water. Expected Performances C7. Describe the effect of heating on the movement of molecules in solids, liquids and gases. C8. Explain how local weather conditions are related to the temperature, pressure and water content of the atmosphere and the proximity to a large body of water. C9. Explain how the uneven heating of the Earth’s surface causes winds. 7.1 – Energy provides the ability to do work and can exist in many forms. a)      Work is the process of making objects move through the application of force. b)      Energy can be stored in many forms and can be transformed into the energy of motion. C12. Explain the relationship among force, distance and work, and use the relationship (Work =Force x Distance) to calculate work done in lifting heavy objects. C13. Explain how simple machines, such as inclined planes, pulleys and levers, are used to create mechanical advantage. C14. Describe how different types of stored (potential) energy can be used to make objects move.

1)      Conduct simple experiments that show and explain how forces work to change the motion of an object.

2)      Calculate work done on an object as force or distance varies.

3)      Explain in writing how the six simple machines make work easier but do not alter the  amount of work done on an object, and demonstrate how everyday objects function as simple machines

4)      Determine ways to modify a simple machine (inclined plane, pulley and lever) to improve its mechanical advantage.

5)      Defend the statement, “Work output of a machine is always less than work input because of energy lost due to friction.”

6)      Design and create a working compound machine from several simple machines.

7)      Use a diagram or model of a moving object (roller coaster, pendulum, etc.) to describe the conversion of potential energy into kinetic energy and vice versa.

8)      Discuss different forms of energy and describe how they can be converted from one form to another for use by humans (e.g., thermal, electrical, light, chemical, mechanical).

9)      Trace energy conversions that occur in the human body once food enters and explain the conversions in writing.

10)  Calculate potential and kinetic energy and relate those quantities to total energy in a system.

4)      Investigate and report on how the introduction of heat affects the motion of particles 4. and the distance between them.

5)      Illustrate the transfer of energy as matter changes phase.5.

6)      Design, conduct and report in writing an investigation that reveals different substances 6. absorb and release heat at different rates.

7)      Research and give examples of heat transfer and local weather differences in 7. Connecticut.

8)      Investigate and explain the movement of local winds, including “sea breezes” and 8. “land breezes,” based on the uneven heating of the Earth’s surface and a change in air pressure.

9)      Examine and explain that global winds are caused by uneven heating of the Earth’s 9. surface and the rotation of the Earth.

 Real-life applications and examples: Energy Resources Miscellaneous Energy Topics Alliance to Save Energy Energy Review Guide Vocabulary Comparing Energy Sources Density

Introduction: Did you ever wonder why waterbeds have heaters? Have you ever wondered how a refrigerator works? Have you ever wondered how an engine works? How can birds stand in icy water without losing a lot of body heat? Why are sidewalks made in sections? Why do large bridges have expansion joints? How do heat pumps work? These questions and more will be answered in this unit.

Energy Millionaire Game

Energy and Work Review Game

Heat Review Game

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Mr. Hand's 8th Grade Science Site