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WorksheetsCH 15 8th Grade Science Putman
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Temperature is a measure of ____ of the particles in an object.
a)
the difference between the potential and kinetic energy
b)
the sum of the potential and kinetic energy
c)
the average potential energy
d)
the average kinetic energy
2.
The lowest possible temperature is ____.
a)
–273°F
b)
0ºK
c)
–273°K
d)
0°
3.
A liquid thermometer works because liquid ____ when warmed.
a)
expands
b)
Contracts
c)
liquifies
d)
solidifies
4.
The thermal energy of an object is ____.
a)
it's kinetic energy
b)
it's potiential energy
c)
its kinetic energy plus its potential energy
d)
it's kinetic energy minus it's potential energy
5.
Heat is thermal energy transferred from one object to another because of a difference in ____.
a)
mass
b)
density
c)
cold energy
d)
temperature
6.
Fast food restaurants keep food hot with infrared lamps. The heat is transferred to the food by ____.
a)
Radiation
b)
convection
c)
conduction
d)
nuclear fission
7.
When a pot of water is put on a stove, the water at the top gets hot primarily by ____.
a)
radiation
b)
conduction
c)
convection
d)
incorporation
8.
When a cold can of soda is insulated, the heat flow into the can on a hot day ____.
a)
increases
b)
stays the same
c)
is less than hot
d)
decreases
9.
Water makes a good coolant because it has a ____.
a)
condensation
b)
evaporation
c)
low specific heat
d)
high specific heat
10.
All objects emit ____ radiation.
a)
kinetic
b)
electromagnetic
c)
thermal
d)
solar
11.
Heat is ____ energy that is transferred from one object at a certain temperature to another at a different temperature.
a)
thermal
b)
solar
c)
electromagmetic
d)
radiate
12.
Most materials ____ when they are heated.
a)
contract
b)
expand
c)
cool
d)
radiate
13.
A heat engine ____.
a)
changes thermal energy into mechanical energy
b)
changes mechanical energy to thermal energy
c)
changes mechanical energy into electrical energy
d)
changes kinetic energy into thermal energy
14.
In a diesel engine, the fuel is ignited by ____.
a)
glow plug
b)
compression
c)
spark plug
d)
reduction
15.
A device that can be used both for cooling and heating is a ____.
a)
heat engine
b)
heat pump
c)
compressor
d)
vaporizer
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