Energy Transformations

Which of the following best shows thermal energy?

• reading a book

• water from a faucet turning a turbine generator

• sweating while you run

• a generator is turned by a bike wheel to complete a circuit

Which of the following is an example of mechanical energy?

• listening to music

• fire burning wood

• opening a door

• sunlight shining on a solar panel

What type of energy is shown by this animation?

• mechanical

• electrical

• light

• thermal

• sound

What type of energy is best shown by this animation?

• mechanical

• electrical

• light

• thermal

• sound

Which of the following gadgets best shows the transformation of energy from electrical to mechanical with the correct reasoning?

• A fan because electricity is being used to spin the blades of the fan.

• A light bulb because electricity is being used to generate light and heat.

• Water heating up because electricity is used to raise the temperature of the water.

• A stove, because electricity is used to heat the stove elements.

If you have a battery in a device, what is the first energy transformation that must happen?

• Chemical to electrical

• Electrical to light

• Chemical to light

• Electrical to chemical

The blades of a toy helicopter spin when its circuit is connected to a battery. Which sequence below correctly identifies the energy changes taking place in the helicopter?

• chemical to electrical to mechanical

• electrical to chemical to mechanical

• mechanical to chemical to electrical

• electrical to mechanical to chemical

How does a wind turbine change forms of energy?

• Mechanical to electrical

• Mechanical to light

• Electrical to mechanical

• There is no energy transformation

Energy transmitted by electromagnetic waves that we can see

• mechanical

• electrical

• light

• thermal

• sound

Energy transmitted by electromagnetic waves that we can't see, but we can feel as a temperature change

• mechanical

• electrical

• light

• thermal

• sound