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Complete the puzzle.
The chemical energy in fossil fuels is released by ____ the fossil fuels.
Animals store their excess energy in this form. They can use this later on if they do not have enough energy.
The direct conversion from sunlight into electricity can be accomplished by ____ panels.
A type of potential energy that can be burned to supply heat, such as wood.
A storage of energy invented by humans and that is filled with chemicals.
A form of energy that is used in homes and is produced by the movement of electrons.
____ bulbs are more efficient than normal light bulbs.
A measure of energy that is used for measuring the amount of energy in food.
A form of energy that results from the attraction of objects that are made of iron.
The most powerful type of energy that can be produced by changing nuclei instead of atoms through either fission or fusion.
A type of fossil fuel that mostly consists of methane. (2 words)
The movement of thermal energy through liquids and gases.
One calorie is the amount of ____ that is needed to raise the temperature of one kilogram of water by one degree Celsius.
Fossil fuels are formed from the remains of ____ and microorganisms that were buried millions of years ago.
Humans get their energy from this.
A type of fuel formed from the remains of plants or sea creatures millions of years ago.
A form of energy that results from the attraction between two objects. This form of energy results in ocean tides.
Cooled air that is heavier than the surrounding air will ____.
One of the gases released into the air when fossil fuels burn. (2 words)
Potential energy exists when an object is affected by this. Gravity and magnetism are examples of this.
Light waves travel ____ than sound waves.
A type of fossil fuel that is in the form of a soft rock and easily burns.
A type of energy resource that is generated when water turns a turbine through pipes in a dam.
The law of ____ of energy states that energy can not be created or destroyed.
A form of energy that travels as waves through the air and some solids and liquids.
Hydroelectric power plants use falling water to spin these.