Worksheets5 IR radiation and Heat
Total questions: 21
Worksheet time: 14mins
Name
Class
Date
1.
True or false: Heat moves from the cooler object to a warmer object
a)
True
b)
False
2.
Temperature is a measure of the...
a)
total energy in a substance
b)
total kinetic energy in a substance
c)
average potential energy in a substance
d)
average kinetic energy of molecules in a substance
3.
High temperature is connected to:
a)
Low kinetic energy.
b)
High kinetic energy.
c)
Zero net energy.
d)
Equal kinetic energies.
4.
The SI unit for measuring heat is the
a)
Pascal
b)
Kelvin
c)
Joule
d)
Calorie
5.
Which best describes heat transfer by radiation?
a)
a slice of bacon frying in a pan
b)
a pot on a stove boiling water
c)
a camp fire warming hands
d)
a hot air balloon
6.
Which example below is an example of radiation?
a)
Standing on a hot metal bridge
b)
The attic is warmer than the basement
c)
The Sun heating the Earth
d)
Touching hot sand with your feet
7.
The energy of motion is called
a)
kinetic energy.
b)
potential energy.
c)
thermal energy.
d)
work.
8.
Which material is the best conductor of heat?
a)
Wood
b)
Plastic
c)
Glass
d)
Steel
9.
Why do metals conduct thermal energy more quickly?
a)
Particles vibrate faster
b)
Due to the presence of bound electrons
c)
Due to the presence of free electrons
d)
Metals are grey
10.
Which phase is the best conductor of heat?
a)
Solid
b)
Liquid
c)
Gas
11.
Snowman melting in the sun.
a)
Conduction
b)
Convection
c)
Radiation
12.
What is infrared radiation?
a)
The circulation of a fluid caused by heating it.
b)
Transfer of heat inside a metal.
c)
Heat energy transfer by electromagnetic waves
d)
Transfer of light energy
13.
All objects emit infrared radiation (T/F)
a)
True
b)
False
14.
The hotter an object the more infrared radiation is given off (T/F).
a)
True
b)
False
15.
Which of the following is best at reflecting infrared radiation?
a)
Dark, matt surface
b)
Light, shiny surface
c)
Dark, shiny surface
16.
Which of the following is the best at absorbing infrared radiation?
a)
Dark, matt surface
b)
Light, shiny surface
c)
Dark, shiny surface
17.
Infrared radiation cannot pass through a vacumn (T/F)
a)
True
b)
False
18.
Which temperature probe would record the highest temperature?
a)
A (silver)
b)
B (black)
c)
Both would be the same.
19.
The three cans were all filled with boiling water they were left for ten minutes and then the temperature of the water was measured again. In which can would the water temperature be the lowest?
a)
A
b)
B
c)
C
d)
There would be no difference.
20.
Hot air rises because it is ...?
a)
Less dense than the surroundings
b)
More dense than the surroundings
c)
molecules expand and become ligher
d)
molecules become lighter
21.
Why do these marathon runners have silver foil around them after finishing the race? Choose two.
a)
It reflects the IR radiation emitted by the body, keeping the runner warm
b)
It absorbs the IR radiation, keeping the runner warm
c)
It reduces conduction
d)
It reduces the size of the convection current
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