January Standards: Physics Potential Energy Conservation of Energy Energy Transfer Kinetic Molecular Theory

POTENTIAL ENERGY P2.P1X A-B

What is Energy? Energy- the ability to do work Work- when force causes an object to move in the direction of a force – Transfer of Energy D1

Types of Energy 1.Kinetic – Energy of motion – Kinetic = (mass X speed) squared / 2 2.Potential – energy of possibility – Gravitational Potential= weight X height 3.Mechanical – total energy – Mech = kinetic + potential

Types (Cont) 4. Thermal – total energy of particles 5. Chemical- energy as compound re-arranges atoms 6. Electrical- energy of moving electrons 7. Sound- object vibrations 8. Light –vibrations of electrical particles 9. Nuclear- changes in nucleus of atom

Day One Assignment Please create, on the front side of a piece of blank paper, a pictorial representation of each of the types of energy Musts: – Have titles of each type – Have a definition of each type – Have a colored example for each type – You will have ALL NINE represented

Change of State D2 How does a solid become a liquid become a gas… and so on?

Change of State Sublimation- solid to gas without liquid state Deposition- gas to solid without liquid state Condensation- gas to liquid Evaporation- liquid to gas Melting- solid to liquid Freezing- liquid to solid

ADD ENERGY REMOVE ENERGY

Day Two Assignment

Physical or Chemical Change? What does it mean to change something? (Students, formulate a mental response to share with the class) To change something means to alter it Types of change: – Chemical – Physical D3

Chemical Change Chemical Change- making or breaking bond between atoms – Can not be undone Examples (write at least two) – Rustiron oxide forms – Cookies BakingIngredients combine – Bread Risingyeast causes expansion – Gas burningforms carbon and water – Sun tanningskin produces melanin – Log Burningcarbon is produced

Physical Changes Physical Change- re- arranges molecules but does not affect their overall structure – Can be undone Examples (write at least two) – Making IceRemoval of heat – Cutting PaperSeparation of pieces – Dissolving SugarIntegration in H2O – Boiling WaterAddition of heat – Pumping Up a TireAdding gas substance

Is Change of State (CoS) a chemical or a physical change? Why? (Please formulate your thought and be ready to share) A Physical Change, because what you have changed can be returned to its original form

CONSERVATION OF ENERGY P3.P1 A

ENERGY TRANSFER P3. P2 A

KINETIC MOLECULAR THEORY P4.P1 X A-C