Differentiate between potential and kinetic energy PA Anchor

Differentiate between potential and kinetic energy PA Anchor: S 8. C. 2. 1

What does it mean when you say “I have no energy? ”

The ability to do work or cause change What kinds of things can do work? Units: Joule (J)

(1) Kinetic Energy an object has while it’s moving From Greek: “kinetos” = “moving” (2)Potential Energy an object has while it’s not moving Elastic Gravitational

Depends on: Mass Velocity / Speed

Depends on: Mass Gravity = 10 m/s 2 Height PE = mgh

Identify different forms of energy PA Anchor: S 8. C. 2. 1

Mechanical Thermal Chemical Electromagnetic Nuclear

Analyze how energy can be converted from one form to another PA Anchor: S 8. C. 2. 1

Most forms of energy can be converted Toaster Body Electrical thermal + mechanical Chemical mechanical Car engine Electrical thermal chemical

Apply the Law of Conservation of Energy PA Anchor: S 8. C. 2. 1

The law of conservation of energy states: Energy cannot be created or destroyed, it can only change forms

Identify examples of heat transfer as radiation, convection, and conduction Differentiate between radiation, convection, and conduction PA Anchor: S 8. C. 2. 1

Conduction Convection Radiation

Heat is transferred without the movement of matter Ex: You touch a hot pot with your hand

Transfer of heat within a substance Ex: Boiling water

Transfer of energy by Electromagnetic (EM) waves Ex: Bonfire

Identify conductors and insulators PA Anchor: S 8. C. 2. 1

Conductors Transmit energy well Examples: Metal Tile Floor Water Insulators Don’t transmit energy well Examples: Wood Paper Air

Discuss energy conservation techniques PA Anchor: S 8. C. 2. 1

Insulation Made of fiberglass Seal around windows and doors Prevent air flow convection currents

Differentiate between renewable and nonrenewable resources PA Anchor: S 8. C. 2. 1

Renewable A resource that can be replaced in nature at a rate close to the rate at which it is being used Ex: Wind, tidal, geothermal Nonrenewable A resource that exists in a fixed amount Ex: Coal, oil, natural gas

Discuss advantages to using alternative sources of energy Describe the impact of using nonrenewable resources on the environment PA Anchor: S 8. C. 2. 1

Advantages: Won’t run out if used correctly Less environmental impact Disadvantages: May be available only in limited locations May be more expensive to use

Advantages: “Ample” supply More cost efficient than alternative sources Disadvantages: Huge environmental impact (mining) Huge environmental impact (pollution) Will eventually run out

Explain the sun’s impact as a source of energy PA Anchor: S 8. C. 2. 1

All energy can be traced back to the sun… One example: Coal / Fossil Fuels These are made by the remains of dead plants / animals. Plants get their energy from the sun (photosynthesis) Animals get their energy from plants which get their energy from the sun