January Standards: Physics Potential Energy Conservation of Energy Energy Transfer Kinetic Molecular...
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Transcript of January Standards: Physics Potential Energy Conservation of Energy Energy Transfer Kinetic Molecular...
January Standards: Physics
Potential EnergyConservation of Energy
Energy TransferKinetic Molecular Theory
POTENTIAL ENERGYP2.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)– Rust iron oxide forms– Cookies Baking Ingredients combine– Bread Rising yeast causes expansion– Gas burning forms carbon and water– Sun tanning skin produces melanin– Log Burning carbon 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 Ice Removal of heat– Cutting Paper Separation of
pieces– Dissolving Sugar Integration in H2O– Boiling Water Addition of heat– Pumping Up a Tire Adding 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 ENERGYP3.P1 A
ENERGY TRANSFERP3. P2 A
KINETIC MOLECULAR THEORYP4.P1 X A-C