Energy Test
conductor
A material that allows heat and electricity to pass through it.
Insulator
A material that does not conduct heat well
specific heat
The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree celcius
electromagnetic energy
a form of energy that travels through space in the form of waves
The mechanical energy of a coconut falling from a tree _______
remains constant
The kinetic of energy of an object increases as its _____ increases.
speed
How much force is required to lift a rock a vertical distance of 8 m if 80 J of work were done?
10 N
gravitational potential energy
Energy stored by objects due to their position above Earth's surface.
work
Force exerted on an object that causes it to move
When an object is dropped what happens to potential and kinetic energy as it falls ?
GPE goes down, KE goes up
potential energy formula
PE=mgh
thermal energy
The total energy of kinetic and potential energy of all atoms in an object. heat energy
Convection
The transfer of heat by the movement of a fluid or heated particles
an example of energy conversion from kinetic to thermal energy would be
friction
The _______ energy of an object depends on both the height and the mass of an object
gravitational potential
An object that has kinetic energy must be
in motion
Plastic is an example of what?
insulator
The ______ energy of an object increases with its height.
gravitational potential
Temperature measures
average kinetic energy
green plants convert light energy from the sun into ________ during photosynthesis
chemical potential energy
The law of ______ states that energy in a system can change forms but can never be created of destroyed
conversation of energy
Conduction is the transfer of heat energy by
direct particle contact
kinetic energy
energy of motion
Work =
force x distance
mechanical energy
total Kinetic or potential energy in a system