1 / 4

What is energy?

What is energy?. Energy is the ability to do work or cause a change. Energy has many forms. Even though one form can change into another form, energy cannot be made or destroyed. Different forms of energy, including mechanical, light, thermal, electrical, and sound energy, have many uses.

devlin
Download Presentation

What is energy?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. What is energy? • Energy is the ability to do work or cause a change. • Energy has many forms. Even though one form can change into another form, energy cannot be made or destroyed. • Different forms of energy, including mechanical, light, thermal, electrical, and sound energy, have many uses.

  2. Electrical Energy • Electrical energy is the movement of electrons. • Electrons are the negatively charged particles in atoms. • They can move easily from one object to another. • When an object has more electrons than protons, it becomes negatively charged. • When an object has more protons than electrons, it becomes positively charged. • The charge that results from a gain or loss of electrons is called an electric charge. • Just for fun: http://phet.colorado.edu/en/simulation/travoltage

  3. Electrical Energy • Batteries store chemical energy and are often used to power circuits (converting chemical to electrical energy) • Electrons flow from the negative end (-) to the positive end (+). • You can remember this by thinking about taking away electrons from the negative end (-) and adding electrons to the positive end (+). • Electrical Energy is achieved by creating a complete or closed circuit. Circuit = wires connected to a power source • Breaks in a circuit cause the energy flow to STOP! This results in an open circuit.

  4. Electrical Energy Series Circuit- one path for electrons. If one light burns out, they all go out because the circuit is broken (or open). Parallel Circuit- each light bulb has a separate path for the electrons to travel on If one light bulb burns out, the others stay lit because the electrical current can continue to flow. http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc

More Related