Energy Transformations

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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The diagram shows a circuit with the bulb glowing. How does the energy change as it moves from inside the battery, along the wires, and through the light bulb?

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

The picture shows a light bulb attached to a hand generator. What energy transformation occurs as the handle of the generator is turned?

• thermal → solar → light
• solar → light → electrical
• mechanical → electrical → light
• electrical → mechanical → light

When water falls through a dam and turns a turbine connected to a generator, electricity is produced. This electricity is often used to light our homes and offices. Which of the following shows the energy transformations that occurs?

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

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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 of the following shows an energy transformation from chemical energy to electrical to light energy?

• A bolt of lightning lights the night sky.
• A candle glows brightly in the dark.
• A fire in a fireplace lights up a room.
• A battery causes a flashlight to shine.

A television works by transforming electrical energy into what other kinds of energy?

• Light, thermal, and sound
• Thermal, chemical, and solar
• Sound, mechanical, and electrical
• Light, chemical, and mechanical

Kinetic Energy is transferred to _____ Energy.

• Solar
• Electrical
• Thermal
• Potential

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When the light changes, Potential Energy is transferred to _____ Energy.

• Potential
• Mechanical
• Thermal
• Kinetic

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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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