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Question-1
Which of the following elements is used for measuring the temperature in ordinary thermometers?
(A)
Br
(B)
Pb
(C)
Cu
(D)
Hg
Question-2
Which of the following is not an insulator?
(A)
Brick
(B)
Bamboo
(C)
Brass
(D)
Cardboard
Question-3
A liquid which is a good conductor of heat is:
(A)
Water
(B)
Milk
(C)
Mercury
(D)
Alcohol
Question-4
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-5
A wooden spoon is dipped in cup of ice cream. Its other end:
(A)
Becomes cool by the process of conduction
(B)
Becomes cool by the process of convection
(C)
Becomes cool by the process of radiation
(D)
Does not become cool
Question-6
The normal temperature of a healthy person is 37
0
on:
(A)
Kelvin scale
(B)
Roemer scale
(C)
Fahrenheit scale
(D)
Celsius scale
Question-7
The objects made of steel, mica, wood and brass are lying in the same room during winter season. The objects which will feel warmer to touch are:
(A)
Steel and brass objects
(B)
Mica and brass objects
(C)
Wooden and steel objects
(D)
Mica and wooden objects
Question-8
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-9
The heat from the sun reaches the earth by the process of:
(A)
Conduction
(B)
Radiation
(C)
Convection
(D)
Not determined yet
Question-10
The invisible rays which transfer heat by radiation are:
(A)
Ultraviolet rays
(B)
Ultrasonic rays
(C)
Infrasonic rays
(D)
Infrared rays
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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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