WELCOME BACK MINIONS!!!Time to learn some science!!!
WARM-UP
• Give an example of the following:• Mechanical Energy• Thermal Energy• Chemical Energy• Electrical Energy• Nuclear Energy• Electromagnetic Energy
REVIEW…
• Energy• The ability to do work or cause change.
• Work• The transfer of energy.
• Power• The rate at which work is done
• Kinetic Energy• Energy of motion.
• Formula for Kinetic Energy
REVIEW
• Define Potential Energy• Stored energy that results from the position or shape
of an object.
• What are 2 types of Potential Energy• Gravitational and Elastic Potential Energy
• Formula For Gravitational Potential Energy
• What factors affect Kinetic Energy?• Mass and Velocity
• What factors affect Potential Energy?• Height and Weight
MECHANICAL ENERGY
• Add an object’s Potential Energy to its Kinetic Energy and you have MECHANICAL ENERGY!!!
ENERGY TYPE #2
• Examples:• Melting Ice Cream• Evaporating Water• Molten Rock
• Thermal Energy• The total Potential and
Kinetic energy of atomic particles.
ENERGY TYPE #3
• Examples:• Scoot across a carpet and
get a shock touching a doorknob
• Lightning• Power in your home to run
appliances
• Electrical Energy• The energy of electrical
charges
ENERGY TYPE #4
• Examples:• Found in foods you eat• Found in objects around
you• Found in all atoms!
• Chemical Energy• Energy stored or
released from chemical bonds in molecules
ENERGY TYPE #5
• Examples:• Fission (breaking apart
a nucleus of an atom)• Fusion (Making a
nucleus bigger by collision)
• Without this, no sun or sunshine!!!
• Nuclear Energy• Energy stored or
released in the nucleus of an atom
ENERGY TYPE #6
• Examples:• Light so we can see• Microwaves to heat our
food• X-Rays to see if any
bones were broken
• Electromagnetic Energy• Waves that have both
electrical and magnetic properties
INTRODUCTION…
• How do power plants make electricity?
• How does your body make energy?
• How does your cell phone battery give your cell phone power?
ENERGY TRANSFORMATIONS
• Most forms of energy can be transformed into other forms!
• Energy Transformation- A change from one form of energy to another.
SINGLE TRANSFORMATIONS
• What does this term mean?
• One transformation• Toaster = Electrical to
Thermal• Cell Phone = Electrical to
Electromagnetic• YOU! = Chemical to
Mechanical
MULTIPLE TRANSFORMATIONS
• What does this term mean?
• Multiple Transformations• Match =
• Mechanical to …• Thermal to… • Chemical to… • Thermal to… • Light!
MULTIPLE TRANSFORMATIONS
•Power Plant…
MULTIPLE TRANSFORMATIONS
•You try one!
TRANSFORMATIONS BETWEEN…KINETIC & POTENTIAL
ENERGY!
QUICK VIDEO TO WATCH…
http://en.wikipedia.org/wiki/File:Physicsworks.ogg
Check this out!
TRANSFORMATIONS BETWEEN…KINETIC & POTENTIAL
ENERGY!
KINETIC TO POTENTIAL TO KINETIC
TRANSFORMATIONS BETWEEN…
KINETIC & POTENTIALENERGY!
CONSERVATION OF ENERGY
• Law of Conservation of Energy
• Energy cannot be created nor destroyed.
• One form of energy transforms into another, no energy is “destroyed” in the process.
ENERGY & FRICTION
ENERGY & MATTER
• Einstein discovered that matter can be transformed into energy!
• Destroying a small amount of matter releases a great amount of energy!
• Matter and energy together must be conserved!• (Cannot be turned to nothingness!)
CLOSING…
• How does a car transform energy?
• How does Juggling transform back and forth between potential to kinetic?
• Why doesn’t a top keep spinning?• What happens to the energy?
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