WARM UP 1 What is the independent variable

WARM UP 1. What is the independent variable” 2. What is the dependent variable? 3. What is the relationship between the # of pizza toppings and cost of the pizza? 4. How much does a pizza with 3 toppings cost? 5. **MATH** What is the slope of this line?

ENERGY • Energy is the ability to do work. • Work is a transfer of energy. Energy and work are expressed in units of joules (J). •

THE TWO MAIN FORMS OF ENERGY ARE: Kinetic energy- the energy of motion. Potential energy- stored energy that can be put into future use

THE TWO MAIN FORMS OF ENERGY ARE: Kinetic energy Electromagnetic Thermal (light) (heat) Potential energy Chemical Nuclear Sound Electrical Mechanical (motion) mechanical (position)

• Mechanical energy is the total energy of motion and position of an object. • mechanical energy potential energy kinetic energy

More mass and/or higher velocity = more KE More mass and/or higher above the ground (resting position) = more PE

22. USE THE DIAGRAM TO ANSWER THE QUESTION BELOW. Each ball has the same mass. Which ball has the greatest potential energy? a. Ball A b. Ball B c. Ball C d. Ball D

• Thermal Energy is the energy of moving molecules • All matter has thermal energy • Higher temperature = more KE

http: //www. youtube. com/watch? v=te 7 a. FC 8 DTls http: //phet. colorado. edu/en/simulation/states-of-matterbasics

• Electrical Energy - the energy of moving electrons.

Sound Energy – moves through vibration of matter Travels in waves MUST have matter to travel through

SEEING SOUND WAVES http: //www. youtube. com/watch? v=DPUlss 0_Lkk

• Electromagnetic Energy is produced by the vibrations of electrically charged particles. • Travels in waves • Does NOT need matter to travel • Examples: light, x-rays, microwaves

COMPARE/CONTRAST: LIGHT AND SOUND Light Doesn’t need matter to travel Sound Kinetic energy Travel in waves Happen because particles vibrate Needs matter to travel

• Chemical Energy –stored in bonds between atoms • Examples: food, fuel, batteries

• Nuclear Energy – stored in nucleus of an atom • Fusion- nuclei join • Fission- nucleus is split • Example: sun creates light/heat through fusion of hydrogen nuclei into helium

http: //phet. colorado. edu/en/simulation/nuclear-fission

What type of energy?

What type of energy? WHY? KINETIC ENERGY ELECTROMAGNETIC ENERGY

What type of energy?

What type of energy? KINETIC ENERGY ELECTRICAL ENERGY

HEAT FROM A TOASTER

HEAT FROM A TOASTER KINETIC ENERGY THERMAL ENERGY

RING FROM A CELL PHONE

RING FROM A CELL PHONE KINETIC ENERGY SOUND ( ( (( (( ENERGY

LUMP OF COAL

LUMP OF COAL POTENTIAL ENERGY CHEMICAL ENERGY

MOVING BUS

MOVING BUS KINETIC ENERGY MOVING MECHANICAL ENERGY

LAW OF CONSERVATION OF ENERGY Energy cannot be created or destroyed only transferred from one form to another

1. BALL ROLLING DOWN A HILL From: To:

BALL ROLLING DOWN A HILL From: To:

2. LIGHT BULB From: To:

LIGHT BULB From: Electrical Energy To: Electromagnetic Energy KINETIC ENERGY ELECTRICAL ELECTROMAGNETIC ENERGY

3. ELECTRIC OVEN From: To:

ELECTRIC OVEN From: Electricity To: Heat KINETIC ENERGY ELECTRICAL THERMAL ENERGY

4. BATTERY POWERED FLASHLIGHT From: To:

BATTERY POWERED FLASHLIGHT From: Chemical Energy POTENTIAL ENERGY CHEMICAL ENERGY To: Electromagnetic Energy KINETIC ENERGY ELECTROMAGNETIC ENERGY

6. TREE From: To:

TREE From: Sunlight KINETIC ENERGY To: Wood POTENTIAL ENERGY ELECTROMAGNETIC CHEMICAL ENERGY

7. Ipod From: To:

Ipod From: Batteries To: Sound POTENTIAL ENERGY KINETIC ENERGY CHEMICAL SOUND ( ENERGY ( (( (( ENERGY

8. SOLAR PANELS From: To:

SOLAR PANELS From: Light To: Electricity KINETIC ENERGY ELECTROMAGNETIC ELECTRICAL ENERGY

6. NUCLEAR POWER PLANT From: To:

NUCLEAR POWER PLANT From: Nuclear Fission To: Electricity POTENTIAL ENERGY KINETIC ENERGY NUCLEAR ELECTRICAL ENERGY

7. WIND FARM From: To:

WIND FARM From: Movement To: Electricity KINETIC ENERGY MOVING MECHANICAL ELECTRICAL ENERGY

8. DAM (HYDROELECTRIC PLANT) From: To:

DAM (HYDROELECTRIC PLANT) Input: Moving Mechanical Energy Output: Electricity KINETIC ENERGY MOVING MECHANICAL ELECTRICAL ENERGY

9. TV From: To:

TV To: Sound and light From: electricity KINETIC ENERGY POTENTIAL ENERGY ELECTROMAGNETIC SOUND ENERGY ( ( (( (( CHEMICAL KINETIC ENERGY

11. FIRE From: To:

FIRE To: Heat And Light From: Wood POTENTIAL ENERGY KINETIC ENERGY ELECTROMAGNETIC CHEMICAL THERMAL ENERGY

12. THE SUN From: To:

THE SUN From: Nuclear Fusion POTENTIAL ENERGY NUCLEAR ENERGY To: Heat And Light KINETIC ENERGY ELECTROMAGNETIC THERMAL ENERGY

13. CAR From: To:

CAR To: From: Gas KINETIC ENERGY ELECTRO MAGNETIC ENERGY ( (( ( CHEMICAL SOUND (( POTENTIAL ENERGY KINETIC ENERGY MOVING MECHANICAL ENERGY

EXIT SLIP 1. Jose ate a turkey sandwich and an apple for lunch. Later that day, he ran 2 miles during soccer practice. Which of the following energy transformations occurred between lunchtime and the end of Joes’s run? a) Thermal energy was converted to kinetic energy. b) Kinetic energy was converted to chemical energy. c) Electrical energy was converted to thermal energy. d) Chemical energy was converted to mechanical energy. 2. What kind of energy transformation happens in a television? a) Light is transformed into electrical energy b) Electrical energy is transformed into chemical energy. c) Electrical energy is transformed into light energy. d) Chemical energy is transformed into light energy.

EXIT SLIP 3. What kind of energy transformation happens when a person rides a bike down a hill? a) Light energy is transformed into chemical energy. b) Electrical energy is transformed into kinetic energy. c) Potential energy is transformed into kinetic energy. d) Kinetic energy is transformed into potential energy. 4. What kind of energy transformation happens when firewood it lit in a campfire? a) Light energy is transformed into chemical energy. b) Chemical energy is transformed into thermal energy. c) Potential energy is transformed into kinetic energy. d) Kinetic energy is transformed into potential energy.

EXIT SLIP 5. What king of energy transformation occurs when you eat food and then do jumping jacks? a) Light is transformed into chemical energy. b) Electrical energy is transformed into chemical energy. c) Chemical energy is transformed into mechanical. d) Potential energy is transformed into Chemical energy.