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Question-1
Digital thermometers available these days use:
(A)
Alcohol
(B)
Water
(C)
Mercury
(D)
None of the above
Question-2
The woolen clothes keep us warm during winter because
A. Wool is an insulator
B. Wool is a conductor
C. Wool traps air
D. Wool has vacuum
(A)
A and B
(B)
B and D
(C)
C and D
(D)
A and C
Question-3
The normal temperature of a healthy person is 37
0
on:
(A)
Kelvin scale
(B)
Roemer scale
(C)
Fahrenheit scale
(D)
Celsius scale
Question-4
Some stainless steel frying pans are provided with copper bottoms. The reason for this could be that
(A)
Copper bottom makes the pan more durable
(B)
Such pans appear colourful.
(C)
Copper is a better conductor of heat than stainless steel
(D)
Copper is easier to clean than stainless steel
Question-5
Which of the following features are those of a clinical thermometer?
A. Short temperature range
B. Wide temperature range
C. Alcohol filled glass bulb
D. Constriction in glass tube
(A)
A and B
(B)
B and C
(C)
A and D
(D)
B and D
Question-6
The convection currents in air transfer heat:
(A)
Downwards
(B)
Upwards
(C)
Downwards as well as upwards
(D)
Towards sides
Question-7
Which is the device used for measuring temperature?
(A)
Tachometer
(B)
Odometer
(C)
Thermometer
(D)
Barometer
Question-8
An iron ball at 40
o
C is dropped in a mug containing water at 40
o
C. What will happen then?
(A)
Heat will flow from iron ball to water
(B)
Heat will not flow from iron ball to water or from water to iron ball
(C)
Heat will flow from water to iron ball
(D)
Temperature of both ball and water will increase
Question-9
The transfer of heat by convection can take place in which of the following?
(A)
Solids and liquids
(B)
Solids and vacuum
(C)
Gases and liquids
(D)
Vacuum and gases
Question-10
Which of the following elements is used for measuring the temperature in ordinary thermometers?
(A)
Br
(B)
Pb
(C)
Cu
(D)
Hg
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Std 7
CBSE
Practice in Related Chapters
Fibre to Fabric
Nutrition In Animals
Respiration in Organisms
Nutrition in Plants
Heat
Acids,Bases and Salts
Transportation in Animals and Plants
Physical and Chemical Changes
Weather Climate and Adaptations of Animals to Climate
Wind, Storms and Cyclones
Soil
Reproduction in Plants
Motion and Time
Electric Current and its Effects
Light
Water: A Precious Resource
Forests Our Life Line
Waste Water Story
Water and its Conservation
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