Unit 2: Energy Review

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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NGSS.MS-LS1-6

Which of the following best describes the energy transformations that occur when a flashlight that runs on batteries is turned on?

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

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.

The picture shows a microwave oven. As a microwave oven is operated, electrical energy is transformed into all of the following types of energy EXCEPT —

• Solar
• Light
• Thermal
• Mechanical

Tags

NGSS.MS-PS1-4

Muscles operate to push the pedals on a bicycle causing the wheels to turn. What type of energy being represented?

• mechanical

• physical

• thermal

• chemical

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

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

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NGSS.MS-PS3-5

NGSS.MS-PS3-4

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

• W
• X
• Y
• Z

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NGSS.MS-PS2-4

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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NGSS.HS-PS3-2

NGSS.HS-PS3-3

Which of the following shows the correct order of the energy transformations that occur when green plants produce their food from the Sun’s energy?

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

Tags

NGSS.MS-LS1-6

As the ball is dropped, the potential energy decreases while the kinetic energy increases. What happens to the total amount of energy?

• It decreases

• It increases

• It stays the same

• It disappears

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-2