Lab: Thermal Energy Transfer — Unit test Answers
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22
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Cindy pours cool milk into a hot bowl of oatmeal and then stirs it with a room-temperature spoon. Which substance will have heat flow from it to the other substances?
A
the milkB
the spoonC
the oatmealD
the surrounding air23
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Which of these actions would increase heat transfer between two objects?
A
establishing their thermal equilibriumB
increasing the area of their contactC
using objects with similar specific heatsD
reducing the time of their contact24
Which material would result in the least amount of energy transfer?
A
A reflector that is dark in color and smooth.B
An absorber that is light in color and rough.C
An absorber that is dark in color and rough.D
A reflector that is light in color and smooth.25
Jin listed some common thermal insulators and conductors in a chart.Which belongs in the area marked with an X?
A
ironB
foamC
woodD
glass26
Which is equal to a temperature of 20°C?
A
20°FB
68°FC
36°FD
32°F27
Which type of energy is transferred by convection currents?
A
chemicalB
thermalC
potentialD
electrical28
Which is an example of radiation?
A
A melting snowman sweats drop of water under a bright sun.
B
A smiling man roasts marshmallows over a wood fire.
C
A cook stirs vegetables in a frying pan over a gas burner.
D
Three pairs of bare feet and lower legs walk across black pavement.
29
Which shows the temperatures of three substances, in order, from greatest to least?
A
water vapor, ice, waterB
ice, water, water vaporC
water, water vapor, iceD
water vapor, water, iceDid you find these answers helpful?
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