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Complete the puzzle.
Lightning is a form of ____ energy.
A form of energy that results from the attraction of objects that are made of iron.
The energy that is stored within atoms.
A form of energy that results from the movement of machine parts.
A measure of energy that is used for measuring the amount of energy in food.
Fuels such as coal and oil that can be used only once.
Any type of material that stores energy and can be burned to supply heat.
The basic unit of energy that scientists use.
Earth gets most of its energy from this form of energy.
A form of energy that travels as waves through the air and some solids and liquids.
A form of energy that travels as waves from the sun to Earth.
Chemical energy is stored in the ____ of molecules.
A form of energy that is used in homes and is produced by the movement of electrons.
The energy stored in compressed springs is known as ____ potential energy.
A storage of energy invented by humans and that is filled with chemicals.
A type of potential energy that is made from fossil fuels.
The burning of wood releases this form of energy. This energy is created as a result of the movement of atoms.
Animals store their excess energy in this form. They can use this later on if they do not have enough energy.
One of the gases released into the air when fossil fuels burn. (2 words)
A type of fuel formed from the remains of plants or sea creatures millions of years ago.
Fuels such as the wind and sun that can generate power without being used up.
Humans get their energy from this.
Batteries and plants store this kind of energy.