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15 Cards in this Set
- Front
- Back
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______ kinetic energy is energy of individual molecules in an object that are moving randomly.
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Internal kinetic energy
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_____ energy of an object is its internal energy due to the random motion of the individual molecules.
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Thermal energy
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What is the difference between thermal energy and heat?
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Thermal energy is the internal kinetic energy of an object while heat is the transfer of thermal energy from one object to another.
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______ is the tranfer of thermal energy from an hotter object to a less hot object.
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Heat
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Does heat flow only one way?
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Yes, always from warmer objects to cooler objects.
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When does the transfer of heat stop?
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When the objects reach the same temperature.
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What are the factors that affect thermal energy?
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1. temperature of the object
2. mass of the object 3. specific heat of the object |
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The average kinetic energy of the individual molecules of an object is determined by the _____ of the object.
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temperature
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What is the difference between temperature and thermal energy?
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Temperature is the average kinetic energy of the individual molecules while thermal energy is the internal energy of all the molecules put together.
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The ___ of an object affects the thermal energy; the larger the object, the more molecules.
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mass
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Thermal energy of an object depends partly on the ____ of substance that makes up the object.
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type
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Which type of substance has a greater ability to absorb and retain heat - water or sand?
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water
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____ heat is the amount of heat that must be added to a certain mass to raise its temperature by 1 degree.
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Specific heat
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Specific heat reflects a substance's ability to store _____ energy.
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thermal
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Why is water used as a coolant in car engines and nuclear reactors?
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Because water has a high specific heat and can absorb a lot of heat.
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