Chapter 12 Lesson1 Forms of Energy
Forms of Energy
This musician’s electric guitar wails at a concert, as colored lights wash over the band. It’s hot on stage because of the lights, but they really add to the show. The fans are thrilled and screaming with excitement. The exciting concert wouldn’t be possible without several different forms of energy.
Introducing Forms of Energy
Energy, or the ability to cause changes in matter, can exist in many different forms. Energy can also change from one form to another. The photo to the left of the guitar player represents six forms of energy: mechanical, chemical, electrical, light, thermal, and sound energy. Another form of energy is nuclear energy.
Can you find the different forms of energy in the photo of the guitar player?
- mechanical energy
- chemical energy and electrical energy
- thermal energy
- All the above
Seven Forms of Energy
Mechanical Energy Chemical energy Electrical energy Electromagnetic energy Thermal energy Sound energy Nuclear energy
Is the energy of movement. It is found in objects that are moving or have the potential to move.
This drummer has mechanical energy as he moves the drumsticks to hit the drums and cymbals. The moving drumsticks also have mechanical energy, but they would have mechanical energy even if they weren't moving. That's because they have the potential to fall when the drummer is holding them above the floor. This potential energy is due to gravity.
Is energy that is stored in the bonds between the atoms of compounds. If the bonds are broken, the energy is released and can be converted to other forms of energy.
This portable guitar amplifier can run on batteries. Batteries store chemical energy and change it to electrical energy.
The bright lights on this stage use electrical energy. They are wired into the electrical system of the of the hall. The guitars and microphone also use electrical energy. You can see the electrical cords running from them to the outlet on the floor below the musicians.
Is the energy of moving electrons. Electrons flow through wires to create electric current.
Is energy that travels through space as electrical and magnetic waves. The light flooding the stage in the Figure to the left is one type of electromagnetic energy. Other types include radio waves, microwaves, X rays, and gamma rays
Is the energy of moving atoms of matter. All matter has thermal energy because atoms of all matter are constantly moving. An object with more mass has greater thermal energy than an object with less mass because it has more atoms.
Why is this jogger sweating so much? His shirt is soaking up his sweat because he has so much thermal energy. The jogger is hot because of the heat from the sun and the hard work he puts into his run.
Is a form of mechanical energy that starts with a vibration in matter. For example, the singer’s voice starts with vibrations of his vocal cords, which are folds of tissue in his throat. The vibrations pass to surrounding particles of matter and then from one particle to another in waves. Sound waves can travel through air, water, and other substances, but not through empty space.
Energy, or the ability to cause changes in matter, can exist in many different forms. Energy can also change from one form to another. Forms of energy include mechanical, chemical, electrical, electromagnetic, thermal, sound, and nuclear energy.
How can we use these different forms of energy to our advantage?
How does energy affect our everyday lives?