A phone battery stores energy that gets used to power the screen.
What is chemical energy (converted to electrical and light/heat energy)?
A swinging pendulum has the most of this type of energy at the top of its swing, and the most of this other type at the bottom.
What are potential energy (top) and kinetic energy (bottom)?
Rubbing your hands together makes them warm. This energy transformation is happening.
What is mechanical energy → heat (thermal) energy?
This type of energy is stored in the nucleus of an atom and is released during nuclear reactions like fusion in the sun or fission in power plants.
What is nuclear energy?
A roller coaster car slows down as it climbs the next hill, but it still makes it to the top. Explain why, using the Law of Conservation of Energy.
What is: kinetic energy is converted back into potential energy as the car rises — energy isn't lost, it just changes form (with some lost to friction as heat)?
A wind turbine powers a light bulb. Name the complete energy transformation chain.
What is kinetic (mechanical) energy of wind → electrical energy → light energy (+ heat energy)?