energy Flashcards
energy resources that formed from buried remains of plants and animals
what are fossil fuels
the comparison of the amount of energy before a conversion with the amount of energy after a conversion
what is energy efficiency?
the types of energy that electrical energy is converted to in a hair dryer
what are thermal and sound energy?
energy of a compound that changes as its atoms are rearranged
what is chemical energy?
naturally replaced more quickly than they are used (wind, water, solar)
what are renewable resources?
simply a change from one form of energy to another
what is energy conversion
energy of an object because of its position (stored energy)
what is potential energy?
a natural resource that can be converted into other forms of energy in order to do useful work
what is an energy resource?
a group of objects that transfer energy OLY to each other
what is a closed system?
this is where potential energy is the greatest in a roller coaster
what is at top of the first hill?
the total energy of motion and position of an object (kinetic + potential)
what is mechanical energy?
can make work easier by changing the size or direction (or both) of the force needed to do the work
what is a machine?
the process that a plant uses to convert CO2 and H20 into sugar and 02
what is photosynthesis?
the type of energy that some mechanical energy is turned into because of friction?
what is thermal energy?
a natural resource that can be converted into other forms of energy in order to do useful work
what is an energy resource?
