Introduction to Energy!€¦ · 6. Thermal energy - kinetic energy of an object’s particles. •...

Introduction to Energy!

6th Grade Module H: Matter and Energy

Unit 2: Energy

Lesson 1

Energy is…

There are two main types of energy

• Kinetic energy - energy of an object that is due to motion. All moving objects have kinetic energy.

• depends on its mass and speed.

• increases as mass increases and as speed increases

• Which has more kinetic energy? Why?

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• Potential energy - energy that an object has due to its position, condition, or chemical composition.

• Gravitational potential energy –result of an object’s position

• Increases as the object’s height or mass increases.

• Which has greater GPE?


• Condition of an object affects its potential energy. • Ex: Stretching a rubber band increases its potential energy.

• Chemical potential energy - depends on chemical

composition.• As bonds break and new bonds form between atoms during a

chemical change, energy can be released.


Where is potential energy the greatest, when the archer has

pulled back the bow or when it is in resting position?

• An object can have both potential and kinetic energy at the same time.


Read

and do

p. 102-

103

Forms of kinetic and potential energy

• Energy is expressed in joules (J).

1. Mechanical energy is the sum of an object’s kinetic energy and potential energy. It is the energy of position andmotion.

"mechanical energy = kinetic energy + potential energy".


2. Sound energy is kinetic energy caused by the vibrationof something.

-vibrations in the air get transferred to the eardrum

3. Electromagnetic energy - transmitted through space in the form of electromagnetic waves.

• caused by the vibration of electrically charged particles.

• include visible light, X-rays, and microwaves

• Kinetic or potential? What do you think?

4. Electrical energy is the

energy that results from the flow (movement) of charged particles. (K or P?)

5. Chemical energy - form of potential energy that

depends on the kinds of atoms and their arrangement.-examples: food, batteries, matches

6. Thermal energy - kinetic energy of an object’s particles.

• faster the molecules move = more thermal energy

• Heat: energy transferred from an object at a higher temperature to an object at a lower temperature

7. Nuclear energy - found in nucleus of an atom

• When an atom’s nucleus breaks apart, or when the nuclei of two small atoms join together, energy is released.


What forms can energy take?

• What forms of energy can you identify in this pinball game?


Unit 2 Lesson 1 Introduction to Energy

Transformers


What is an energy transformation?

• An energy transformation takes place when energy changes from one form into another form.

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

• Often, one form of energy changes into more than one form.


What is an energy transformation?

• In a flashlight, chemical energy is transformed into electrical energy.

• The electrical energy is then transformed into light and thermal energy.



Is energy conserved?

• A closed system is a group of objects that transfer energy only to one another. Energy is conserved in all closed systems.

• The law of conservation of energy states that energy cannot be created or destroyed. It can only change forms.

• All of the different forms of energy in a closed system always add up to the same total amount of energy.



• Energy Transformation

• Check with Ms. R to make

sure yours is not taken

• State the type of energy it is

transforming FROM and TO

• Examples with pictures

• Where is energy “lost” to

the environment?

• Use pages 108-109 &

computer

Energy Posters• Forms of Energy

• State the form

• Define

• Kinetic or potential (or

both)?

• Examples with

pictures

• Use pages 104-106

Introduction to Energy!€¦ · 6. Thermal energy - kinetic energy of an object’s particles. •...

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