Unit 3 Exp. 4 SAVVAS Conservation of Energy

Your science class goes on a field trip to the nearby amusement park for an assignment. Before riding the roller coaster, your teacher has you observe other riders. At what point will the roller coaster car have transformed the greatest amount of gravitational potential energy into kinetic energy?

• W

• X

• Y

• Z

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NGSS.MS-PS3-5

NGSS.MS-PS3-1

NGSS.MS-PS3-2

As the car moves down the slope, the amount of __________ energy decreases while the amount of __________ energy increases.

• kinetic; potential

• potential; kinetic

• mechanical; kinetic

• potential; mechanical

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NGSS.MS-PS3-5

NGSS.MS-PS3-1

NGSS.MS-PS3-2

Which sentence ending describes the correct path by which energy is transferred through the roller coaster? Between Point W and Point Z, the total amount of energy in the car _______

• stayed the same; it gained gravitational potential energy but lost kinetic energy.

• stayed the same; it lost gravitational potential energy but gained kinetic energy.

• changed; it gained gravitational potential energy and gained kinetic energy.

• changed; it lost gravitational potential energy and lost kinetic energy.

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NGSS.MS-PS3-5

NGSS.MS-PS3-4

Look at the diagram of a light bulb on a simple circuit. Over time, the battery loses power and the bulb dims. Finally, it goes out. What happened to the energy?

• The battery creates new energy.

• There is no energy being transformed by the system.

• Energy is being destroyed by the system.

• Energy is leaving the system in the form of light.

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NGSS.MS-PS3-5

NGSS.MS-PS3-4

An energy transformation that occurs in photosynthesis involves the conversion of:

• Light energy to chemical energy

• Chemical energy to light energy

• Heat energy to electrical energy

• Mechanical energy to heat energy

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NGSS.MS-LS1-6

Energy is conserved and transferred through the food web as it moves from Grass to Grasshopper, then to Rabbit, Bird, and finally to Fox. Which statement best describes how energy is transferred and transformed among these organisms?

• Energy is transferred from Grass to Grasshopper, then to Rabbit, Bird, and finally to Fox, with some energy lost as heat at each step.

• Energy is created at each level as it moves up the food web.

• Energy increases as it moves from Grass to Fox.

• Energy is only transferred between Grass and Grasshopper, not to other organisms.

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NGSS.MS-LS2-3

Which is an example of an energy transformation from chemical to electrical to light energy?

• A. A bolt of lightning causing thunder

• B. A candle lighting up a room

• C. A campfire warming up and illuminating an area

• D. A battery causing a flashlight to shine

2. Look at the diagram. Food webs are a great way to illustrate conservation of energy. Using the organisms in the food web, describe how energy is conserved as it is transferred and transformed through the food web. Include the organisms shown.

   
   

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NGSS.MS-LS2-3