# TYPES OF ENERGY - Polk County School District Identify all the forms of energy you see in the picture below. Essential Question: How are forms of energy alike and different? Standards:

S8P2c. Compare and contrast the different forms of energy (heat, light, electricity, mechanical motion, sound) and their characteristics. S8P2a. Explain that energy transformation in terms of the Law of In our previous lesson, we learned that there are two

types of energy: Potential Energy & Kinetic Energy There are also many forms of energy. This lesson will provide an overview of some forms of energy. These forms of energy will be taught more indepth in later lessons.

There are many forms of energy, but we are going to focus on just a few. Heat energy (Thermal) Mechanical energy Light (Radiant) energy Electrical energy Sound energy

Chemical energy Use Your Graphic Organizer to Record Important Information Heat (Thermal) Energy Energy that is created in the movement of particles (atoms) that produces heat. Heat (thermal) energy increases as

temperature increases The faster the particles (atoms) move, the greater the kinetic energy and the greater the objects thermal energy. The opposite is also true. Thermal energy also depends on the number of particles. If there are more particles, there is more thermal energy.

Heat (Thermal) Energy A hot object is one whose atoms and molecules are excited and show rapid movement. (More heat energy) A cooler object's molecules and

atoms will show less movement. Which has more thermal energy? Why? Hot Chocolate

Ice Water Mechanical Energy Energy of motion The total energy of motion and position of an object (potential energy + kinetic

energy) Mechanical energy can be all Mechanical Energy The mechanical energy of an object stays the same, but the potential and kinetic energy of

an object can increase or decrease. Think of juggling. The kinetic energy decreases until all of the pins kinetic energy turns into potential energy, and it stops moving upward. As the pin falls back down again, its potential energy starts changing Examples of Mechanical

Energy Light (Radiant) Energy Energy created by vibrating particles that create waves that travel through space and time. [These waves are called electromagnetic waves.] Light (Radiant) energy can be

absorbed, transmitted, or reflected. Includes energy from gamma rays, x-rays, ultraviolet rays, Examples of Light (Radiant) Energy Electrical Energy

Energy that is carried by an electrical current (the movement of electrons, the negatively charged particles of atoms) The electrical energy used in

your home can be thought of as potential energy Sound Energy Sound energy is caused by an objects vibrations

A vibrating object transmits energy through the air around it in waves (longitudinal waves) Chemical Energy Energy stored in chemical bonds When chemical bonds are broken,

new chemicals are formed and some of it is released energy Examples: Food, Battery, Burning candle or Wood, Fireworks, Fossil

Examples of Chemical Energy What type of energy cooks food in a microwave oven? RADIANT ENERGY What type of

energy is the spinning plate inside of a Electrical energy is transported to your house through power lines. When you plug an

electric fan to a power outlet, electrical energy is transformed into what type of energy? What type of energy is shown below? Chemical Energy

What types of energy are shown below? Chemical, Mechanical and Radiant Energy What type of energy is shown below?

Thermal Energy What type of energy is shown below? Chemical Energy What types of energy are shown

below? Mechanical and Thermal Energy (Friction causes thermal energy) In the world around you, energy is transforming continually between one form and another.

Often, one form of energy changes into more than one form. According to the Law of Conservation of Energy, energy is never created or destroyed, it just changes its form.

Demonstration of the Law of Conservation of Energy: Exploratorium: Science of Baseball Baseketball a Physicist Party Trick Examples of Transforming Heat (Thermal) Energy When an object is heated to a high temperature, it glows and gives off

heat. Therefore, some thermal energy is converted to light (radiant) energy A fire or a flame converts heat (thermal) energy to light (radiant) energy Energy in the form of heat is almost always one of the products of an energy transformation. For example, when people exercise,

Examples of Transforming Chemical Energy Inside your body, chemical energy is transformed into mechanical energy (kinetic energy) Batteries, wood, matches, fireworks, fossil fuels, etc. are forms of chemical energy that are converted into other

forms once used or burned The matter contained in living organisms has chemical energy. When organisms die, this chemical energy is broken down and converted to other Examples of Transforming Light (Radiant) Energy Plants use light (radiant) energy to

make chemical energy. [remember Photosynthesis] The chemical energy in food is then changed into another kind of chemical energy that your body can use. [remember cellular respiration] Your body then uses that energy to give you mechanical energy [kinetic and potential energy]

Also, the light (radiant) energy Examples of Transforming Electrical Energy Every time you plug something into a wall outlet, you are using electrical energy and that electrical energy is transformed into other forms of energy

Hairdryer: electrical energy mechanical energy, thermal energy, and sound energy Blender: electrical energy mechanical energy and sound energy

Alarm Clock: electrical energy light energy and sound energy Lets examine the Energy Transformation in riding a bike. As the rider pedals, her leg muscles transform

chemical energy (potential energy stored from the food she ate) into mechanical (kinetic) energy The mechanical (kinetic) energy of her leg muscles transforms into mechanical (kinetic energy) of the bicycle as she pedals Some of this energy transforms into potential energy as she moves up the hill Some energy is transformed into thermal

energy (her body is warmer because chemical energy is released and because of friction, the Energy Transformation s in a Car A car engine transforms the

chemical energy in gasoline into mechanical energy (kinetic and potential energy) Not all of the chemical energy is converted into mechanical energy. Some is converted into thermal energy, and the engine becomes hot.

Identify other energy transformations that you can observe in a car. Energy Transfer c e l

E Sound (mechanical) l a c tri

Thermal Electrical Chemical Ele ctr i

ca l Mechanical Light (Electromagnetic) Energy

Transformations Watch the short video clip. Identify the energy transformations that occur. http://www.discovery.com/tv-shows/other-shows/ videos/time-warp-lighting-a-match.htm In the video, chemical energy in the match changes to heat (thermal) energy and light

(radiant) energy. While the match is burning, is the amount of chemical energy in the match the same? Why or Why not? As the match is burning, the chemical energy is decreasing while the thermal energy and the radiant energy are increasing. How is Energy Like Money?

Handout As you discovered in the handout, energy is like money in that it doesnt go away, it just changes form. Additionally, the starting twenty dollars was reduced, but all of it was still there just in different places. The same is true for

energy. Study Jams Video: Energy and Matter http://studyjams.scholastic.co m/studyjams/jams/science/ma tter/energy-and-matter.htm Lets see what you know

about energy transformations. The following slides will show an image. Guess the type of energy transformation that occurs in the image. Identify the Energy

Transformation Electrical Sound Identify the Energy Transformation Light Chemical

Identify the Energy Transformation Chemical Mechanical Identify the Energy Transformation Electrical Heat

(Thermal) Identify the Energy Transformation Chemical Mechanical Identify the Energy Transformation

Electrical Mechanical and Heat (Thermal) Identify the Energy Transformation Mechanical Heat (Thermal)

Identify the Energy Transformation Electrical Light and Heat (Thermal) Identify the Energy Transformation

Chemical Light and Heat (Thermal) Identify the Energy Transformation Light Electrical and Heat (Thermal)

Identify the Energy Transformation Sound Electrical Sound Activities to Reinforce Energy Transformation

Energy Forms and Conversion Worksheet Energy Transformations  Worksheet see resources for notes Energy Transformations  Worksheet see resources for notes Energy Cube Review How is Energy like Money? Handout Energy Transformations in a Car

constructed response Station Activities to demonstrate Identify energy transformations in the illustration below. Include the following: Heat, Light, Mechanical, Electrical, Sound, & Chemical