Show:
Forms of Energy
Laws of Thermodynamics
Energy Transformations
Heat Transfer
Mixed Practice
100
energy of motion
What is mechanical or kinetic energy
100
energy cannot be _______ or __________
What is created or destroyed
100
swinging on a swing
What is potential energy at the height of the swing to kinetic energy as the swing moves
100
heat transfer through fluids (gases and liquids)
What is convection
100
the total amount of kinetic energy in the atoms/molecules within a substance
What is heat
200
flow of electrons
What is electrical energy
200
The Law of Entropy
What is the Second law of Thermodynamics
200
eating an apple and riding your bike
What is chemical energy to mechanical energy
200
feeling the warmth of the sun of your face
What is radiation
200
a material that resists the flow of heat and electricity
What is an insulator
300
light, infrared, ultraviolet, microwaves; energy that can travel through the vacuum of space
What is electromagnetic radiation
300
Energy transformations are never 100% _____________
What is efficient
300
plugging in a tv and watching a show
What is electrical to electromagnetic radiation (light) and mechanical energy (sound) and heat.
300
heat always travels from ________ to __________
What is hot/warm to cold/cool
300
Explain what happens to the atoms within a substance as it absorbs heat energy
What is greater atomic motion, causing the atoms to move faster and spread apart
400
energy stored in the chemical bonds between atoms; foods and fuels
What is chemical energy
400
When dropping a bouncy ball on the floor it will never bounce back to the exact height it was dropped at because...
What is because the transformation of potential to kinetic energy is not 100% efficient because some energy is lost as heat from friction between the ball and the floor
400
flipping a switch to turn on a lamp
What is mechanical of flicking the switch, electrical to electromagnetic/radiant (light) and heat/thermal
400
the reason why the basement in a home is cooler than the floors above
What is warm air rises and cool air falls due to convection
400
which has more heat energy, the rocky mountains, a hot tub or the Pacific ocean? Why? Which has the greatest temperature? Why?
What is the pacific ocean because it is so large and the total amount of kinetic energy of all the water molecule is greater than all of the others. The hot tub has the greatest temperature.
500
Fission and fusion release this form of energy
What is nuclear energy
500
Explain the demonstration with these steel balls using your knowledge of the first and second law of thermodynamics
What is the kinetic energy was transformed into heat and sound
500
tracing the transformations of energy in a coal fired power plant from coal to generated power.
What is chemical (coal) - thermal (burning the coal to create steam) - mechanical energy (steam turning turbine) - mechanical energy (turning the generator) - electrical energy (magnets spinning around a metal coil in generator causes electrons to flow)
500
Explain why you feel that amazing sea breeze as you sit on the beach
What is the result of convection during which the hot sand heat the air above it causing it to become less dense and rise; then the cool, dense air moves in to fill its place.
500
Explain how the construct of a thermos prevents heat transfer.
What is the silvered inner lining reflects infrared radiation, the vacuum space acts as an insulator to prevent conduction and the plastic outer cup prevents conduction and the lid prevents convection