Introduction to Energy Transformations

Some students observing a classroom device being used, noticed the below energy transformations. 
Electrical → Mechanical → Sound
Which device were the students most likely observing?

• A triple beam balance measuring an object’s mass.
• A pencil sharpener plugged into a wall outlet.
• A projector displaying a diagram on the screen.
• A working flashlight used to light up a dark corner.

Which type of energy transformation occurs when a flashlight shines?

• chemical → thermal → electrical
• chemical → electrical → light
• thermal → chemical → light
• chemical → electrical → chemical

The Theory of the Conservation of Energy states -

• Energy can be created, just not destroyed. It changes its form from one type to another.
• Energy can never be created nor destroyed. It can only change its form from one type to another.
• The total energy in our Universe changes, as different forms of energies can be transformed from each other under certain circumstances.
• Energy transformations do not passively occur in our lives, rather we actively make use of energies and transform energies.

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Which energy conversion is taking place when you put gasoline in a car?

• thermal -> electrical
• mechanical -> electrical
• chemical -> mechanical
• mechanical -> electromagnetic

what type of energy is stored in a battery?

• electrical
• chemical
• thermal
• mechanical

Electrical Energy is transferred to _____ Energy.

• Thermal
• Solar
• Electrical
• None

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The roller coaster cart has the most gravitational potential energy at position-

• W
• X
• Y
• Z

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A student listens to music with a digital music player, similar to the one shown below. Which best describes the energy transformations that take place in the music player?

• Mechanical to chemical to electrical
• Chemical to sound to electrical
• Chemical to electrical to sound
• Electrical to heat to sound

Which of these is an example of light energy being transformed into chemical energy?

• A glow stick lights up when broken.
• Water heated by the sun evaporates.
• A plant makes sugar in the sunlight.
• A battery causes a buzzer to vibrate.

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What is the energy transformation?

• Kinetic to Mechanical to Electrical
• Chemical to Mechanical to Kinetic
• Electromagnetic to Chemical to Electrical
• Kinetic to Sound to Chemical

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