Please come up with 3medium and 3 difficult multiple choice questions from the given text:

Energy Overall and Types

Energy = ability to do work Kinetic (KE) = energy of motion or when energy is being transferred Dependent on velocity and mass Greater KE if moving faster or have more mass Potential (PE) = stored energy or energy waiting to be transferred Dependent on shape or position of object More potential to do work, then higher potential energy

7 Types of Energy Some are renewable

Kinetic Energy

Mechanical - Energy associated with motion, anything moving. Examples of mechanical energy

FORMS OF ENERGY 2. Thermal - Heat Energy Results from friction, causes temperature and phase changes, ALL OTHER TYPES of energy TURN INTO THIS. Solid to Liquid Liquid to Gas

FORMS OF ENERGY 3. Electrical Energy - Energy of moving electrons. The electrical outlets in your home allow you to use electrical energy

4. Light - Produced by the vibrations of electrically charged particle that are visible. LIGHT IS ELECTROMAGNETIC ENERGY

Potential Energy

FORMS OF ENERGY 1. Chemical - Energy that is released as a result of molecular bonds being broken. Ex: All forms of fuel (gasoline, coal, wood, food, radioactive materials) Photosynthesis, batteries.

FORMS OF ENERGY 2. Nuclear - energy associated with changes in the nucleus of an atom. Is potential. Examples: Sun's EnergyNuclear Power PlantNuclear Accelerator

FORMS OF ENERGY 3. Sound - Caused by an object's vibrations. Is potential and kinetic Example: Guitar Strings Vibrating

Law of Conservation of Energy Energy can neither be created nor destroyed Energy changes forms Any type of energy can become any other form of energy

Renewable vs Nonrenewable Energy

Renewable Resource can be replenished quickly quickly = faster than a human lifespan Examples: solar water wind biomass geothermal 15

Nonrenewable Resource take a long time to replenish once used up, they are gone for good Examples: coal natural gas oil nuclear (in process of becoming renewable) 16

Heat vs Temperature What's the difference?

Heat vs. Temperature TEMPERATURE MEASURES THE AVERAGE KINETIC ENERGY (AKE) OF A SUBSTANCE. THE HIGHER THE AKE, THE GREATER THE TEMPERATURE

HEAT IS amount of energy transferred because of the temperature difference

Which has a greater temperature?

Which has more heat?

What are some ways that you or objects heat up?

3 Types of Heat Flow

Conduction Definition - transfer of heat through or between physical objects How it works - atoms oscillate or move more actively when they are hotter If hotter atoms are in contact with cooler objects, there will be frequent collisions between them and the energy will pass from hotter to cooler object

Conduction Real World Example: Holding a hot cup of coffee or tea

Conduction Metals Contain free electrons that drift through the metal These electrons are easily heated and collide with other metal atoms This is why metals heat up faster

Convection Definition - transfer of heat by fluid motions of the materials Fluids are Gases, liquids and solids Solids can act like a liquid and have flow sometimes

Convection How it works - Differences in density causes the fluid to cycle Dense fluid will sink and displace the less dense material to rise Hot fluid rises and cold fluid sinks

Convection Viscosity - resistance to flowing More viscous if harder for substance to flow Less viscous if easier for substance to flow

Radiation Definition - transfer of heat through electromagnetic radiation How it works - Direct contact is not needed for this type of heat transfer Emit heat waves Higher temperatures give off stronger waves Can sometimes see the waves as light

Radiation

Radiation Common examples: Heat from the Sun Microwave Heat from a campfire

All 3 Work Together All work at the same time in real life Radiation is constant Most effective in gases or vacuums Convection is fastest mode in liquids Conduction is best in solids

All 3 Types Side by Side