Examples of energy
the chemical energy of food
Potential (Stored) Energy
Stored energy is
Potential Energy
_______ energy is sent through wires or the air to power such things as lightbulbs, ovens, and washing machines
Electrical
______ energy can be released by splitting an atom. It can also be released by joining two nuclei together to form a single nucleus.
Nuclear
Energy can _______ from one form to another form. For example, engineers now control how electrical energy is formed and where it goes so it can be changed into light energy.
change
_______ energy is stored in a rock perched on a cliff and in an arrow stretched back on a bowstring.
Potential
Moving energy
Kinetic energy
The _____ is the source of almost all energy on Earth.
Sun
On many rivers people have built dams. The dams use the energy of the flowing river to operate machines that also create electricity. This is known as ______ energy.
Water (hydro) energy
When energy changes form, it is called energy ____________.
Transformation (conversion)
When the hammer is raised, it has potential energy from the work done in lifting it. When the hammer is moved toward the nail, the potential energy becomes kinetic energy, which can do the work of driving the nail into the board. When the hammer hits the nail, energy is transferred to the nail and then to the board. This is an example of ______ energy
Mechanical energy
All the energy that an object has because of its motion (kinetic energy) and its position (potential energy).
Mechanical energy
The ______ energy in food is converted, or changed, by the body into moving mechanical energy and heat energy.
Chemical energy
_________ include petroleum, natural gas, and coal. These are used to run factories, heat homes, and power automobiles.
Fossil fuels
One basic law about energy is called the law of conservation of energy. This law states that energy cannot be _______ or ________.
Created or destroyed.
Radio waves, microwaves, X-rays, and gamma rays.
Radiant (light) energy
_______ energy is sometimes called radiant energy. It is the only kind of radiant energy that is visible to the naked eye.
Light energy
If you have stood in front of a fireplace or near a campfire, you have felt the heat transfer known as _________.
Radiation
_____ is the energy that holds together the nucleus of an atom, also called atomic energy.
Nuclear energy
__________ is the transfer of heat energy in a fluid. This type of heating is most commonly seen in the kitchen when you see liquid boiling.
Convection
______ energy is moving energy that is produced by the back-and-forth motion of a vibrating object. For example, a guitar string when being played.
Sound energy
______energy is moving energy. It is the flow of tiny particles called electrons and protons.
Electrical energy
In sunny areas devices collect the heat of the Sun and store it. That heat can be used to heat water and houses. Other devices convert the Sun’s rays into electricity. This is known as ________ energy.
Solar
_____ energy is stored energy (potential energy). It is stored in the bonds between atoms and molecules.
Chemical energy
_________ is the transfer of heat energy from one substance to another or within a substance. For example, have you ever left a metal spoon in a pot of soup being heated on a stove? After a short time, the handle of the spoon will become hot.
Conduction