Law of Conservation of Energy

Law of conservation of energy

My objective is to define the law of conservation of energy.

Poll

I can create energy.

• yes

• no

Open Ended

Think

Where does the energy from the battery in your phone go?

Define: law of conservation of energy.

The law of conservation of energy states that energy cannot be created or destroyed, but it can change its form.

Multiple Select

What are the two main forms of energy?

• kinetic energy

• potential energy

• light

• sound

Discuss the types of energy at position 1, 2, and 3 in the given image.

hint: which position does the roller coaster have high gravitational potential energy, and which position does it have more kinetic energy?

Multiple Choice

a person jumps on trampoline. At the top of the jump the most of the energy is in the form of ___

• kinetic energy

• thermal energy

• potential energy

Multiple Choice

What is law of conservation of energy?

• energy is universal

• energy can neither be created nor be destroyed

• energy has electrical mass

Energy changing from one form to another...

is sometimes called energy conversion or energy transformation.

>>> Any form of energy can change into any other form of energy.

Multiple Choice

See the picture. There is electrical energy coming from the outlet in the wall. When the energy goes into the lamp what energy does it transform into?

• Mechanical Energy

• Thermal Energy

• Sound Energy

• Light Energy

Often one form of energy can change into more than one form.

Chemical-> Heat-> Kinetic-> Electrical-> Heat

Multiple Select

When wood burn it changes from chemical energy to what 2 other forms of energy? Click the 2 other forms.

• Radiant (Light)

• Nuclear

• Heat

• Mechanical

Multiple Select

A gasoline-powered generator is used to provide lighting for a house.

Choose the best 3 energy forms found in this transformation example?

• Chemical

• Mechanical

• Light

• Nuclear

Multiple Choice

Skateboarder #1 is showing potential energy as he waits at the top of the half pipe.

Skateboarder #2 has dropped into the half pipe, to what type of energy has he converted his potential energy?

• Potential

• Thermal

• Kinetic

• Chemical

Food is chemical energy used to make the body function.

• It is converted into kinetic energy to help the body move

• It is also converted into thermal energy to keep the body warm.

Energy Conversion in Plants

• Chemical energy stored in the food we eat ultimately comes from the sun.

• The process is called photosynthesis. Light energy is converted into chemical energy.

Energy Conversions are needed in EVERYTHING we do.

(Think of what you do everyday.)

Some examples of energy conversions

Open Ended

What are the energy conversion for a hair dryer?

Open Ended

What are the energy conversions for a radio?

REMEMBER: Any form of energy can change into any other form of energy.

***Energy cannot be destroyed, but it can be transformed.***