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chptr. 4
chapter 4 test
Question | Answer |
---|---|
the ability to cause change, or something can change form as it is transferred | energy |
the kind of energy an object has due to position | potential |
the kind of energy an object has because of its motion | kinetic |
the kind of PE an object above Earth's surface has | Gravitational |
a factor that affects KE but not GPE | Speed |
A kind of energy that is stored in chemical bonds | chemical |
a factor that affects GPE | height |
The SI unit for Energy | Joule |
something that burns to produce CO2 and Water | Natural Gas |
the kind of potential energy that is stored in something that can stretch | elastic |
formula for KE | KE= 1/2 mass x speed^2 |
Formula for GPE | GPE= mass x acceleration of gravity x height |
energy in the form of motion is ___ ___ | KE |
the greater ____ a moving object has, the more kinetic energy it has. | mass; velocity |
A rock on the edge of a cliff has _____ _____, because of position | PE |
thermal energy | |
energy that is stored is ____ ___ | chemical energy |
_____ is measured in joules | energy |
doubling an object's velocity will _____ its kinetic energy | 4x |
_____ _____ _____ in energy stored in chemical bonds | Chemical potential energy |
___ ____ stored by thing that stretch or compress | elastic energy |
a book and a feather sitting next to each other on a shelf have _____ PEs | different |
2 copies of the same book are in a book case. One book is 2x as high as the other. They have ____ PEs | different |
A toaster uses _____ ____ to make toast | thermal energy |
____ ____ is the total amount of PE and KE in a system. | Mechanical energy |
When a plant fall from a window, its ___ ___ in transformed into KE | Potential Energy |
The ___ __ _______ ___ ______ states that although energy can change forms, it can never be created or destroyed | law of conservation of energy |
Thermal energy is measured in __ | joules |
the ____ energy of an object increases with it height | Potential |
the kinetic energy of an object increases as its ___ increases | speed |
mechanical energy is the total KE and ___ ____ in a system | PE |
____ can cause KE to change into thermal energies | heat |
green plants can convert light energy from the sun into _____. | chemical potential energy |
the mechanical energy of a coconut falling from a tree __ ___ | remains constant |
The law of ___ __ ____ states that energy in a system can change forms but can never be created or destroyed | conservation of energy |
energy stored by objects due to their position above earth's surface | GPE |
the total amount of potential and kinetic energy in a system | mechanical energy |
energy cannot be created or destroyed | law of conservation of energy |
stored energy due to position | potential energy |
energy stored by something that can stretch or compress | elastic potential energy |
energy stored in chemical bonds | chemical potential energy |
SI unit for energy | Joule |
energy a moving object has because of its motion | kinetic energy |