ENERGY. Starter Directions: Classify the following measurements as Force, momentum, Velocity,...
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Transcript of ENERGY. Starter Directions: Classify the following measurements as Force, momentum, Velocity,...
Starter
• Directions: Classify the following measurements as Force, momentum, Velocity, acceleration.
• 1. m/s squared
• 2. Newton
• 3. kg·m/s squared
• 4. m/s
• 5. kg·m/s
Review
1. What are the 3 scenarios possible where no work is done?
2. Which of the following are examples of work?
1. Carrying a stack of books
2. Lifting a pile of logs
3. Pushing down on a desk
4. Swinging a baseball bat
Energy STORED in chemical ____ that can be released. Ex: food, fossil fuels, battery acid
bonds
CHEMICAL
Energy with which ______ objects perform work.
Ex: Wind, flowing water, using a hammer
MECHANICALmoving
A type of mechanical energy. It is the energy produced when objects ________. Ex:
tuning fork, bellvibrate
SOUND
Stored energy due to a change in the shape
of an object. Ex: _______________
A stretched rubber band
STORED MECHANICAL ENERGY:
Law of Conservation of ENERGY: (same for mass)
Mass/ NRG ____________Mass/ NRG ______________
Mass/ Energy can only __________
Can’t be madeCan’t be destroyed
Change form!!!
Energy Transfer worksheet
• Read and answer the questions on the worksheet entitles energy transformations
Very often during the energy transformation process, some ____ energy is produced due to friction.
This is wasted energy and is lost to the environment.
heat
UNUSABLE ENERGY:
An energy resource that is ________________________________.Being used faster than Earth
Produces it
What is a NON-RENEWABLE RESOURCE?
To make our non-renewable resources last longer we can _____________________________________________.Reduce, Reuse, & Recycle
What is a NON-RENEWABLE RESOURCE?
An energy resource that is _______________________________________.Earth supplies faster than we use it
“unlimited”
What is a RENEWABLE RESOURCE?
Examples: _______________________________
Solar, wind, biomass (trees
etc..)
What is a RENEWABLE RESOURCE?
A renewable resource produces less _________ (substance that can harm living things and/or
the environment
pollution
What is a RENEWABLE RESOURCE?
Videos
• Solar energy
• http://science360.gov/obj/video/cb617b37-4eb5-4518-b44a-da0b7d0190e0
• Wind Energy
• http://science360.gov/obj/video/de111fd3-5fb6-49ae-a02f-11558b417011
All forms of energy can be classified as Kinetic or potential.
The two basic states of energy. So, what’s the difference?
2) An object that is lifted from its position on Earth has __________ potential Energy which depends on
______ and mass
gravitational
POTENTIAL ENERGY
height
4) An object at a higher elevation will have _____ potential energy than an object at a lower
elevation
more
POTENTIAL ENERGY
A Roller Coaster
A roller coaster speeds along its track. It has kinetic energykinetic energy because it is movingmoving.
A Roller Coaster
As it slows to a stop at the top of a hill, it has potential energypotential energy because of wherewhere it is. It has the potential to move because it is above the ground and has somewhere to go.