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Physics for pre-IGCSE-Homework sheet "18"
Paper!:
chose the best answer:
z
1. The top of the mercury thread in a mercury-in-glass thermometer reaches point X at 0 "C and
Point Z at 100 "C. Where might it be at a temperature below the ice-point?
(A.) point W
.
pointX
C. point Y
D. point Z
100 c..
y
Y.
x
w
2. To mark a temperature scale on a thermometer, fixed points are needed. Which is a fixed
point?
A. the bottom end of the thermometer tube
B. the top end of the thermometer tube
the temperature of pure melting ice
D. the temperature of pure warm water
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3.
The diagram shows a thermometer calibrated in degrees Celsius.
What are the values of the lower fixed point and of the upper fixed point on the Celsius scale?
lower fixed
point/oC
A
B
-10
0
upper fixed
point/cC,
110
20
-1-10
100
00
80
70
60
50
40
:3U·
20
@)
0
100
10,
o
--10
D
4.
20
100
A mercury-in-glass thermometer is to be used to measure temperatures from 0 "C to 100 "C. Why is mercury
suitable?
Mercury expands when heated.
B. Mercury has a boiling point below 100 "C.
C. Mercury has a melting point above 0 CC.
D. Mercury is a poor conductor.
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5. To mark the lower fixed point ofa Celsius scale on a thermometer, the thermometer should be placed in
A. Pure alcohol.
B. Pure distilled water.
Pure melting ice.
D. Pure mercury.
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