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.

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?

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.

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

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

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

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

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