Energy Conversions

• A flashlight is on 
• Gasoline burns to power a car 
• A candle burns 
• Electric current runs a refrigerator 

Tags

NGSS.MS-PS3-5

2. A runner eats breakfast then he goes for a jog.  Which of the following energy transformations occurred during the jog?

• Chemical energy to mechanical energy 
• Mechanical energy to chemical energy 
• Chemical energy to light energy
• Electrical energy to chemical energy

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

• mechanical energy → light and sound energy → electrical energy
• light and sound energy → electrical energy → chemical energy
• chemical energy → light and sound energy → electrical energy
• chemical energy → electrical energy → light and sound energy

4. A group of campers create a campfire by burning several wooden logs.  Which statement best describes the energy transformations that occur when the logs burn?

• Chemical energy from the wood is converted into light and heat energy.
• Heat energy from the logs is converted into chemical and light energy.
• Chemical energy from the air is converted into mechanical and light energy.
• Heat energy from the air is converted into mechanical and light energy.  

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A battery-powered flashlight is used by a camper so that she can she after dark on a camping trip.  Which of the sequences below illustrates the transformation that occurs inside the flashlight?

• chemical energy → light energy → electrical energy
• chemical energy → electrical energy → light energy
• mechanical energy → chemical energy → electrical energy
• electrical energy → chemical energy → light energy

• chemical energy → mechanical energy → electrical energy
• mechanical energy → chemical energy → electrical energy
• electrical energy → chemical energy → mechanical energy
• chemical energy → electrical energy → mechanical energy

7. The diagram to the right show a rocket just before and after it lifts off.  The rocket is powered by a fuel mixture that is contained within the rocket.  Which sequence best identifies the energy transfers that take place as the rocket lifts off?

• Mechanical → light → chemical     
• Chemical → mechanical → thermal
• Thermal → chemical → light     
• Chemical → thermal → mechanical

Tags

NGSS.MS-PS3-5

• Potential energy to mechanical energy
• Mechanical energy to chemical energy
• Chemical energy to sound energy
• Electrical energy to potential energy

Tags

NGSS.MS-PS3-2

• Chemical energy into mechanical energy
• Electrical energy into chemical energy
• Heat energy into chemical energy
• Mechanical energy into nuclear energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5