Transfer
requires direct contact
conduction
Which energy is given off when a cell phone rings?
acoustic
What energy CHANGE takes place when someone plugs a radio into an electrical outlet?
Electrical energy changes into sound energy
Riding a bike is an example of this form of energy.
mechanical energy
The energy of motion
mechanical energy
circulates in currents
Convection (Convection Currents)
substances that can flow
fluids
DOUBLE JEOPARDY!
What two things make up the category we call fluids?
What is the difference between energy transfer and energy transformation?
transform = change/covnert
transfer = move/flow
How can a roller coaster gain potential energy?
Go higher
energy of vibrations
acoustic (sound) energy
can occur in a vacuum with zero contact
radiation
the flow of thermal energy
heat
a light bulb converts electrical energy into which two energies?
heat and light
three temperature scales
Celsius, Fahrenheit, Kelvin
this form of energy cooks food in boiling water
thermal
How is radiation different from conduction and convection?
Radiation does not need a medium.
the energy that comes from a substance whose molecules are vibrating faster due to a rise in temperature.
heat or thermal energy
What kind of energy transformations happen when you are eating lunch? (explain at least 2)
Mechanical (move your body to put food in your mouth & chew), chemical (digestion)
______ energy is the only source of energy we can sometimes see.
Radiant Energy
Both of these types of energy produce "waves"
acoustic & radiant
You are lying on the beach on a hot summer day. Tell two forms of heat transfer that may occur and explain why.
Possible answers: Radiation (from sun), conduction (from contact with the hot sand.)
the average kinetic energy of particles in a substance
temperature
A hair dryer transforms _______energy to _____ ,________, & ________
electrical to mechanical, sound, and heat
The Law of Conservation of Energy states that energy is never created or destroyed, it is only ________ from one form to another.
changed
What type of energy includes the fusion and fission of the nuclei of atoms?
nuclear