Energy Transformations

Electrical energy is

• the energy form originated by electromagnetic waves or fields

• the energy type due to the movement of electrons

• the energy form which is present in vibrations of air

The total energy in our universe

• will not change, but can transform to other types

• changes and expands over time

• only changes forms once

Food chains and food webs are examples of energy transformations.

• true

• false

Chemical energy is

• the energy of electric currents

• the energy of electromagnetic waves

• energy stored in bonds between atoms

Choose an example of the following energy transformation electrical to mechanical to sound.

• a digital bathroom scale

• a deer eating grass

• a pencil sharpener plugged into an outlet

Which energy transformation occurs when a flashlight shines?

• chemical to electrical to chemical

• chemical to electrical to light

• thermal to mechanical to electrical

Which shows light energy transforming into chemical energy?

• a battery turning on a fan

• a broken glow stick

• a plant making its own food in the sunlight

Which represents the energy transformation of chemical to light?

• a burning candle

• an electric toaster

• a lamp plugged into a socket

Explain the energy transformation that occurs when water in a river dam turns a turbine making electricity and lights a house.

• mechanical to electrical to light

• mechanical to chemical to light

• electrical to mechanical to light

Which shows chemical to electrical to light energy?

• a candle glows in the dark

• a buttery makes a flashlight shine

• a match lights up a dark cave