What do you think? A light bulb is turned on. It produces light and warms up. Which statement is true? A. All the electrical energy is transformed to light.

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Presentation transcript:

What do you think? A light bulb is turned on. It produces light and warms up. Which statement is true? A. All the electrical energy is transformed to light energy and heat energy. B. All the electrical energy is transformed to light energy. C. Some of the electrical energy is transformed to light energy and some is destroyed. D. All the electrical energy is transformed to heat energy.

Energy Mrs. Smith

Has several forms (or types) Law of Conservation of Energy The ability to do work or cause change. Exists in 2 States Has several forms (or types) Kinetic - Energy of Motion Potential - Stored Energy Chemical Electrical Light Nuclear Heat Sound Can be Converted but not destroyed Can be Transformed or changed, but not created or destroyed. Law of Conservation of Energy

Law of Conservation of energy What is the law of conservation of energy? Energy can not be created or destroyed. It can only be transferred or transformed.

Energy Transformations

What does it mean to “transform” something?

What type of energy is this? What is happening to the energy? Is it being created, Destroyed or transformed Chemical (battery) Electrical (wire) Light (light bulb)

As energy moves through a system it can be transferred and/or transformed. Energy transformations involve the energy changing into a new form Example: the chemical in the battery is transformed into the electrical in the wire.

What happened to my energy? Did my energy just disappear? Energy can be changed from one form to another. When energy changes form, the same amount of energy exists after the change as there was before the change

For example, the chemical energy in a flashlight is transformed into electrical energy and then light energy

Starting energy is transformed to final energy

Energy transformations For example: When you ate breakfast this morning what type of Energy were you consuming? What type of Energy did you then use in order to leave your house (or the Cafeteria)? So, the energy transformation was: Chemical  Kinetic Chemical Starting Energy Kinetic Final Energy

One more example: What type of Energy transformation is taking place? This summer, my friends drove by several windmills on a trip out west (each windmill is about as tall as a 30 story building). They are used as an alternative energy source. What type of Energy transformation is taking place? Kinetic (Wind)  Electrical

Stretching a slingshot and shooting a water balloon Potential  Kinetic

A. 2 step energy transfer ______________ (of the wind) _______________ ( of the kite) Kinetic Energy Kinetic Energy

B. 3 step energy transfer __________ ( of the stove) ___________ (of the pot) ___________ ( of the water) Heat Energy Heat Energy Heat Energy

A. 2 step energy transformation ______________ (of the lightning) _____________ and ____________ (fire) Electrical Energy Heat Energy Light Energy

B. 2 step energy transformation Kinetic Energy _____________ (of the skater) ______________ (of the skater) Potential Energy B A

A. 2 step energy transformation ____________ ( of the ball) ___________( of the ball) Potential Energy Kinetic Energy

B. 3 step energy transformation __________ ( of the ball) ___________ (of the ball) __________ (of the ball) Kinetic Energy Potential Energy Kinetic Energy

Which baseball(s) have the most potential energy/ kinetic energy?

A. 2 step energy transformation _____________ (of gasoline) ______________ (of motion of car) Chemical Energy Kinetic Energy

B. 2 step Energy transformation ____________ (of food) _______________ (of running) Chemical Energy Kinetic Energy

A. 2 step energy transformation Light Energy ______________ (of sun) _____________ (of crops) Chemical Energy

B. 2 step Energy Transformation _____________ (movement of electrons) ____________ and ___________ (of light bulb) Electrical Energy Light Energy Heat Energy Electrons

Give one Get one A. 4 step Energy Transformation ___________ (of battery) ___________ (of electrons) ______________ (of light bulb) _____________ (of light bulb) Chemical Energy Electrical Energy Light Energy Heat Energy

4 step energy transformation Potential Energy _________ (of water) __________ (of water) _________ (of turbine) ________ (of generator) Kinetic Energy Kinetic Energy Electrical Energy

5 step Energy transformation: Nuclear Power Plant _________ (of atoms) to _________ (of water) to ________ (of steam) to ________ (of turbine) to _______ (of generator) Heat Energy Nuclear Energy Kinetic Energy Kinetic Energy Electrical Energy

4 step energy transformation Chemical Energy Light Energy Chemical Energy Kinetic Energy