Show:
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100
energy
What is the ability to do work
100
stored energy
What is potential energy
100
energy of motion (not just moving objects)
What is kinetic energy
100
mechanical energy
What is energy of a moving object
100
chemical energy
What is energy stored in the bonds of atoms and released when atoms react
200
rubbing your hands together
energy transfer from mechanical to heat
200
when does a roller coaster have the most potential energy?
What is at the top of the of the hill
200
When does a roller coaster have the most kinetic energy
What is when it is moving fastest at the bottom of a hill.
200
a book on a shelf has this energy
What is gravitational energy
200
Which phase of matter generally has the most energy? Least energy?
Gas=most. Solid=least.
300
What type of heat transfer is the sun melting a snowman
What is radiation
300
What type of heat transfer is your hand IN warm water?
What is conduction?
300
What type of heat transfer is found in the molten magma in the earths mantle?
What is convection
300
Heat flow between objects of different types goes in which direction?
From the object with more heat to the object with less heat.
300
Why do objects expand when heated?
Heat causes the molecules to vibrate more which increases the space between them causing the object to expand
400
Energy transfer in the sun is
From nuclear to heat/light
400
Biomass comes from what?
Living things or once living things
400
The law of conservation of energy states..(3 sentences)
Energy cannot be created. Energy cannot be destroyed. Energy can only change forms.
400
What is the useful energy we get from a car? What forms of wasted energy does it produce
Mechanical energy is the useful energy. Waste is in the form of heat and sound.
400
In simple terms the Kinetic theory of matter states what?
It says that the movement of molecules produces energy in the form of heat. The more heat, the more the molecuels vibrate/move.
500
Why do objects expand when heated
Heat energy causes molecules to move more which cause the molecules to spread out which cause the object to expand
500
Trace the energy transfers from the sun to the sound of Mr. Lembesis yelling
Nuclear energy in the sun>light energy from the sun>chemical energy in a plant>chemical energy energy in food>sound energy.
500
The use of wind power does what?
Saves fossil fuels and decreases air pollution.
500
How does a thermos work? What do the main parts do?
A thermos prevents or slows heat transfers. The vacuum in between the inner bottle and outer bottle prevents heat transfer through conduction, the silver coating on the inside slows radiation and the cap prevents convection.