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Section 2 Energy Conversions

Bellwork

What do the following a plant, a Bunsen burner, and a

pendulum have in common? What are three other

objects that have same common link?

Chapter 5




Kinetic Energy and Potential Energy

• An energy conversion is a change from one form of

energy to another. Any form of energy can change into

any other form of energy.

• As the skateboarder on the next slide travels up and

down the half-pipe, his energy changes back and forth

between kinetic energy and potential energy.

Chapter 5



Section 2 Energy Conversions Chapter 5




Kinetic Energy and Potential Energy,

continued

• Elastic Potential Energy Stretching a rubber band

stores elastic potential energy in the rubber band.

• When you let the rubber band go, it goes back to its

original shape. It releases its stored-up potential

energy as it does so.

Chapter 5




Conversions Involving Chemical Energy

• Chemical energy is stored in the food you eat. Your

body uses this chemical energy to function.

• Energy Conversion in Plants The chemical energy

in the food you eat comes from the sun’s energy.

Plants use photosynthesis to convert light energy into

chemical energy, as shown on the next slide.

Chapter 5




Conversions Involving Chemical Energy,

continued

• The Process Continues Plants change light energy

into chemical energy. The chemical energy in the food

you eat is changed into another kind of chemical

energy that your body can use.

• Your body then uses that energy to give you kinetic

energy that you use in everything you do.

Chapter 5




Why Energy Conversions Are Important

• Energy conversions are needed for everything we do.

Heating our homes, getting energy from a meal, and

many other things use energy conversions.

• Machines, such as a hair dryer, help harness energy

and make that energy work for you.

Chapter 5




Why Energy Conversions Are Important,

continued

• Conversions Involving Electrical Energy Some

common energy conversions that involve electrical

energy are shown in the table below.

Chapter 5

Alarm clock electrical energy light and sound energy

Battery chemical energy electrical energy

Light bulb electrical energy light and thermal energy

Blender electrical energy kinetic and sound energy




Energy and Machines

• A machine can make work easier by changing the

size or direction (or both) of the force needed to do the

work. Some machines allow you to use less force over

a greater distance to do the same amount of work.

• Machines as Energy Converters Some machines

help you use energy by converting it into the form of

energy that you need.

Chapter 5



Section 3 Conservation of Energy Chapter 5



Section 4 Energy Resources Chapter 5

chapter 5 section 2 energy conversions - amazon s3 · chapter menu resources section 2 energy...

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