Forms of Energy

Mr. Dunnum

Physical Science

Law of Conservation

According to the lawlaw of conservationlawla of energy, energy is never created or destroyed.

The only thing that changes is the form in which energy appears.

What is Energy?

• When an object has energy, it can make things happen.

Energy is the ability to cause change.

Kinetic/Potential Energy Kinetic

• Things that move can cause change.

Kinetic energy is the energy an object has due to its motion

If an object isn’t moving, it doesn’t have kinetic energy

Potential

An object can have energy even though it is not moving.

Potential energy is the energy stored in an object because of its position.

Potential Energy• The potential energy of an

object is greater if it is higher above the floor.

• Potential energy also depends on mass. The more mass an object has, the more potential energy it has.

Intro

The forms that we are going to study are: Thermal/Heat Light/Radiant Electric Nuclear Chemical Wind Solar Hydraulic

Heat/Thermal Heat is the transfer of

energy from high to lower temp.

Thermal energy is just the energy that is transferred

At higher Temp the particles move faster

The faster the particles the more kinetic energy and the greater the thermal energy

Light Energy

Light allows us to see But not all light can be seen Ex. Microwave Light energy is produced by the vibrations of

electrically charged particles The vibrations cause energy to be transmitted Light energy can be transmitted through a vacuum

Visible light spectrum

Electrical Energy Electrical energy is the

energy of moving electrons

The energy created by the electrons are used to do the work

Work that stereos use to produce sound

Fossil Fuel

There are three major forms of fossil fuels: coal, oil and natural gas.

About 70% of our energy comes from fossil fuels

Nuclear Energy Nuclear power plants use

the energy stored in the nucleus of an atom to generate electricity

• Every atomic nucleus contains energy—nuclear energy—that can be transformed into other forms of energy.

Nuclear Energy Generates electrical

energy Comes from changes in

nucleus Lots of potential energy Fission-apart-Plant Vogle Fusion-together-sun

Chemical Energy

Chemical energy is when the energy of the compound changes as its atoms are rearranged

A form of potential energy Examples of chemical energy Food Gas

Wind Energy Wind power is the

conversion of wind energy into a useful form, such as electricity, using wind turbines

Wind energy has historically been used directly to propel sailing ships

Solar Energy Solar energy is the radiant

light and heat from the Sun

Solar power technologies provide electrical generation by means of heat engines or photovoltaic

Hydroelectric energy The mechanical energy of

moving water is transferred by a rotating turbine to a generator, where it is converted to electric energy and conveyed along transmission lines.