Science

BiologyStudy of living things.

ChemistryStudy of chemical

reactions.

PhysicsHow things work

Earth science

Study of the earth.

Energy

Energy comes in many forms:

1. ThermalEx.___________________________

2. ChemicalEx.___________________________

3. ElectricalEx.___________________________

Steam, Sun, Geothermal

Gas, Food, Batteries

Lights, Stoves, Stereo, Television

Energy comes in many forms:

4. SoundEx.___________________________

5. LightEx.___________________________

6. N uclearEx.___________________________

Speakers, Animals (Bats, Whales, Our Voices)

Light bulb, Sun, Fire

Power Plant, Sun is a nuclear furnace!

Energy in Motion

Kinetic energy (KE) is…

Energy that appears in motion.

Examples of Kinetic Energy (KE):

Anything that moves!!

Energy in Motion (not in notes, but very

important!!)

Every object has some kinetic energy!!

Except at ____________ (-273)

Even objects that are not moving.

WHY???All substances have moving or vibrating atoms and molecules!!The Temperature of an object is that objects Average Kinetic Energy.

Energy in Motion

Kinetic energy (KE) depends on a moving objects _____ and ______.mass velocity

Which has more K.E., a train moving at 60mph or a car moving 60mph?HINT?

Which has more K.E., a car traveling at 30mph or the same car moving at 60mph?

The unit of energy is called the _____ (J), is its symbol, and it’s

named after __________________ an English Scientist.

Joule

James Prescott Joule

The Train

The car moving 60mph

James Prescott Joule British physicist James Joule is best known for his work in electricity and thermodynamics (the study of heat). Joule discovered the relationship between electrical current, electrical resistance

Potential Energy (PE)

Potential energy is…Energy that is stored in an object. Based upon position.

Examples of Potential Energy:

1. Bow and arrow2. Rock at the top of a hill3. Sledding or skiing at the top of the hill4. A car full of gas.

Potential Energy (PE)

Who has the most potential energy, Mr. Joule 1 or Mr. Joule 2?

Potential Energy (PE)

Who has the most potential energy, Mr. Joule 1 or Mr. Joule 2?

Potential Energy (PE)

Potential energy is…Energy that is stored in an object. Based upon position.

PE= mass x height

Cantaloupe20ft. Above the street2 pounds

Watermelon10ft. Above the street4 pounds

Cantaloupe20ft. X 2 pounds= 4 0PE

Watermelon10ft. X 4 pounds= 4 0PE

The potential energy is the same!!

Potential Energy (PE)B.Billy Bob decided to break the rules and “fling” a

rubber band across the room at his sweetheart Sally Sue. When he did this ________ energy was transferred to _______ energy.

potentialkinetic

C.Mechanical energy is…

Potential and Kinetic energy together

D.Give 3 examples of chemical potential energy.

1)Food2)Fuel3)Batteries

Mechanical Energy= Potential + Kinetic

Efficiency- Is the difference between total potential energy and total kinetic energy of the system. The energy difference is lost as heat.

All three dishwashers accomplish the same task equally, they clean a load of dishes. Which one is more efficient?

Dishwasher 1 Dishwasher 2 Dishwasher 3 120 Units of electricity 160 Units of electricity 100 Units of electricity

Law of Conservation of Energy

The total amount of energy remains constant. Energy can not be destroyed nor created. Energy can be converted into different forms.

Where is my kinetic and potential energy?

KEPE

KEPE

KEPE

KEPE

lowhigh

IncreasingDecreasing

highlow

DecreasingIncreasing

What 2 forces cause Mr. Joule to come to a stop at the top of the hill?

Friction &Air resistance

.What is happening to the kinetic and potential energy?

KEPE

KEPE KE

PE

KEPE

KEPE

Energy Lab Present 1 system with at least 6 forms of

energy conversions.

Slide #1: Present a diagram on a power point with 6 forms of energy labelled. Site where you found this diagram on the bottom of the slide.

Slide #2: Write a paragraph for each system explaining how energy is converted from one form to another.

Complete the 25 multiple choice lab questions

Energy Project Rubric

25pts. Clear, colorful, and labeled diagram on power point slide

25pts. Written paragraph explaining your system.

25pts Multiple choice Lab Questions 25 pts. Presentation with eye

contact

Energy Project Diagram Example:

Light energy from screen.

Chemical energy from battery.

Heat energy given off from fan

Electrical energy to charge battery from cord.

Sound energy from speakers

Electromagnetic Spectrum

Wavelength in meters (m)

Frequency in Hertz (Hz)

Only a small part can be seen by our eyes!

If you have electromagnetic radiation with a wave length of 1 meter, what is its frequency?

I have an electromagnetic wave with a frequency of 1019 hertz, what type of electromagnetic radiation is this?

At what frequency does the radiation that causes skin cancer fall at?

If you have electromagnetic radiation with frequency of 1022 hertz, what is the wavelength?

What type of radiation has a wavelength of 102 meters?

End of Kinetic and Potential

Energy!

Heat Transfer Next!