Here we are providing Class 7 Science Objective Chapter – 4 Heat because its very important for Class 6 students as we all know that every board exam question has MCQs so that students should practice these questions so that students can get good marks in board. Class 7 Science Objective Chapter – 4 Heat is an extremely important and its also a year in which students learn the fundamentals of concepts that help them lay a solid foundation for their higher education. Here we are providing in Class Class 7 Science Objective Chapter – 4 Heat 100+ questions so that students practice more and more. If you want class wise Notes Then Click Here
Class 7 Science Objective Chapter – 4 Heat
1.Which of the following is a good conductor of heat?
( A ) Iron
( B ) Steel
( C ) Aluminium
( D ) All of these
Ans – ( D )
2.Heat in liquid travels from the:
( A ) bottom to top
( B ) top to bottom
( C ) right to left
( D ) left to right
Ans – ( A )
3.A device used to measure the temperature is
( A ) transistor
( B ) thermometer
( C ) mercury
( D ) none of these
Ans – ( B )
4.Heat transferred into solids by:
( A ) conduction
( B ) convection
( C ) radiation
( D ) insulators
Ans – ( A )
5.Which of the following thermometers has a kink?
( A ) Laboratory thermometer
( B ) Clinical thermometer
( C ) Both ( A ) and (b)
( D ) Digital thermometer
Ans – ( B )
6.The substances which conduct heat easily are called:
( A ) convection
( B ) radiation
( C ) conductors
( D ) none of these
Ans – ( C )
7.What is the range of the temperature reading of a clinical thermometer?
( A ) 35°C – 42°C
( B ) -10°C – 110°C
( C ) 0°C – 100°C
( D ) 32°C – 42°C
Ans – ( A )
8.In which process heat is transferred from hotter end to colder end is known as:
( A ) conduction
( B ) convection
( C ) radiation
( D ) none of these
Ans – ( A )
9.Which of the following thermometer contains mercury?
( A ) Clinical thermometer
( B ) Laboratory thermometer
( C ) Both ( A ) and (b)
( D ) None of these
Ans – ( C )
10.The substances which do not conduct heat easily are called:
( A ) insulators
( B ) convection
( C ) conductors
( D ) none of these
Ans – ( A )
11.What is the range of the temperature reading of a laboratory thermometer?
( A ) -10°C – 110°C
( B ) 35°C – 42°C
( C ) 0°C – 100°C
( D ) -10°C – 100°C
Ans – ( A )
12.In which process the liquid itself moves and carries the heat from one place to another ?
( A ) radiation
( B ) conductors
( C ) convection
( D ) none of these
Ans – ( C )
13.The transfer of heat from hotter body to colder body is called
( A ) conduction
( B ) induction
( C ) convection
( D ) radiation
Ans – ( A )
14.The correct method of reading a clinical thermometer is:
( A ) holding the thermometer by bulb
( B ) before use the mercury level should be below 39°C
( C ) don’t hold the thermometer by bulb
( D ) none of these
Ans – ( C )
15.The process of transferring of heat without any contact between the source of heat and the heated object is called
( A ) conduction
( B ) convection
( C ) radiation
( D ) induction
Ans – ( C )
16.The normal temperature of human body is:
( A ) 47°C
( B ) 36°C
( C ) 37°C
( D ) 39°C
Ans – ( C )
17.Which currents are formed in all liquid on heating ?
( A ) radiation current
( B ) conduction current
( C ) convection current
( D ) none of these
Ans – ( C )
18.The normal temperature of human body is
( A ) 35°C
( B ) 37°C
( C ) 40°C
( D ) 42°C
Ans – ( B )
19.The hand which is over the flame feels hotter because hot air moves in:
( A ) downward direction
( B ) upward direction
( C ) circular direction
( D ) none of these
Ans – ( B )
20.The materials which allow the heat to pass through them easily are called
( A ) insulators
( B ) conductors
( C ) semiconductors
( D ) poor conductors
Ans – ( B )
21.Which thermometer is used to measure temperature of different things and places ?
( A ) Laboratory thermometer
( B ) Clinical thermometer
( C ) Minimum and maximum thermometer
( D ) None of these
Ans – ( A )
22.Which of the following is an insulator?
( A ) Wood
( B ) Iron
( C ) Copper
( D ) Zinc
Ans – ( A )
23.The range of laboratory thermometer is:
( A ) 70°C to 110°C
( B ) -10°C to 110°C
( C ) 20°C to 110°C
( D ) None of these
Ans – ( B )
24.The air from the sea is called
( A ) sea breeze
( B ) land breeze
( C ) wind
( D ) none of these
Ans – ( A )
25.Which scale is used in clinical thermometer nowadays ?
( A ) Celsius scale
( B ) Fahrenheit scale
( C ) Both ( A ) and (b)
( D ) None of these
Ans – ( A )
26.Which colour absorbs more heat?
( A ) Black
( B ) White
( C ) Blue
( D ) Red
Ans – ( A )
27.Which scale was used in clinical thermometer during earlier times?
( A ) Celsius scale
( B ) Fahrenheit scale
( C ) Both ( A ) and (b)
( D ) None of these
Ans – ( B )
28.What is the SI unit of temperature?
( A ) Kelvin
( B ) Celsius
( C ) Fahrenheit
( D ) None of these
Ans – ( A )
29.Which thermometer records the highest and lowest temperature during a period of time ?
( A ) Clinical thermometer
( B ) Laboratory thermometer
( C ) Minimum and maximum thermometer
( D ) None of these
Ans – ( C )
30.Which one is filled in the bulb of a thermometer?
( A ) Mercury
( B ) Lead
( C ) Copper
( D ) Silver
Ans – ( A )
31.A thermometer which do not use mercury is known as:
( A ) clinical thermometer
( B ) laboratory thermometer
( C ) digital thermometer
( D ) none of these
Ans – ( C )
32.A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile
( A ) is a better conductor of heat than the wooden tile.
( B ) is polished while wooden tile is not polished.
( C ) reflects more heat than wooden tile.
( D ) is a poor conductor of heat than the wooden tile.
Ans – ( A )
33.The scale used with the laboratory thermometer is Celsius scale, indicated by:
( A ) °F
( B ) °C
( C ) K
( D ) None of these
Ans – ( C )
34.A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because
( A ) friction between the layers of newspaper produces heat.
( B ) air trapped between the layers of newspaper is a bad conductor of heat.
( C ) newspaper is a conductor of heat.
( D ) newspaper is at a higher temperature than the temperature of the surrounding.
Ans – ( B )
35.One litre of water at 30°C is mixed with one litre of water at 50°C. The temperature of mixture will be:
( A ) 80°C
( B ) More than 50°C but less than 80°C
( C ) 20°C
( D ) Between 30°C and 50°C
Ans – ( D )
36.Sonu and Ria measured their body temperature Sonu found his to be 98.6°F and Ria recorded 37°C.
Which of the following statement is true?
( A ) Sonu has a higher body temperature than Ria.
( B ) Sonu has a lower body temperature than Ria.
( C ) Both have normal body temperature.
( D ) Both are suffering from fever.
Ans – ( C )
37.An iron ball at 40°C is dropped in a mug containing water at 40°C. The heat will:
( A ) flow from iron ball to water
( B ) not flow from iron ball to water or from water to iron ball
( C ) flow from water to iron ball
( D ) increase the temperature of both
Ans – ( B )
36.Sonu and Ria measured their body temperature Sonu found his to be 98.6°F and Ria recorded 37°C.
Which of the following statement is true?
( A ) Sonu has a higher body temperature than Ria.
( B ) Sonu has a lower body temperature than Ria.
( C ) Both have normal body temperature.
( D ) Both are suffering from fever.
Ans – ( C )
39.A wooden spoon is dipped in a cup of ice-cream its other end:
( A ) becomes cold by the process of convection
( B ) becomes cold by the process of conduction
( C ) becomes cold by the process of radiation
( D ) does not become cold
Ans – ( D )
40.Land breeze blows from
( A ) lower surface to upper surface
( B ) sea to land
( C ) upper surface to lower surface
( D ) land to sea
Ans – ( D )
41.Which one of the following is a reliable measure?
( A ) Hotness
( B ) Coldness
( C ) Temperature
( D ) None of these
Ans – ( C )
42.Liquid used in thermometers is
( A ) alcohol
( B ) mercury
( C ) water
( D ) oil
Ans – ( B )
43.Name the device which is used to measure the hotness or coldness of an object.
( A ) Picometer
( B ) Barometer
( C ) Manometer
( D ) Thermometer
Ans – ( D )
44.Liquids and gases transfer the heat by
( A ) radiation
( B ) conduction
( C ) convection
( D ) all of these
Ans – ( C )
45.Which one is filled in the bulb of a thermometer?
( A ) Mercury
( B ) Lead
( C ) Copper
( D ) Silver
Ans – ( A )
46.Metals are conductors of heat.
( A ) average
( B ) poor
( C ) good
( D ) some are poor conductors
Ans – ( C )
47.Heat always flows
( A ) from a colder object to a hotter object
( B ) from a hotter object to a colder object
( C ) in both the directions
( D ) heat never flows from one object to other
Ans – ( B )
48.Woollen clothes
( A ) keep us cool
( B ) decrease the body temperature
( C ) increase the body temperature
( D ) keep us warm
Ans – ( D )
49.Heat from the sun reaches to us by
( A ) radiation
( B ) conduction
( C ) convection
( D ) all of these
Ans – ( A )
50.Degree of hotness or coldness is called
( A ) temperature
( B ) power
( C ) heat
( D ) energy
Ans – ( A )
51.A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because:
( A ) friction between the layers of newspaper produces heat.
( B ) air trapped between the layers of newspaper is a bad conductor of heat.
( C ) newspaper is a conductor of heat.
( D ) newspaper is at a higher temperature than the temperature of the surroundiong.
Ans – ( B )
52.Sunlight reaches the earth’s surface through
( A ) convection
( B ) radiation
( C ) conduction
( D ) radio waves
Ans – ( B )
53.A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile:
( A ) is a better conductor of heat than the wooden tile.
( B ) is polished while wooden tile is not polished.
( C ) reflects more heat than wooden tile.
( D ) is a poor conductor of heat than the wooden tile.
Ans – ( A )
54.Heat is
( A ) a form of energy
( B ) a type of matter
( C ) sometimes energy and sometimes matter
( D ) none of these
Ans – ( A )
55.Paheli and Boojho measured their body temperature. Paheli found her’s to be 98.6°F and Boojho recorded 37°C. Which of the following statement is true?
( A ) Paheli has a higher body temperature than Boojho.
( B ) Paheli has a lower body temperature than Boojho.
( C ) Both have normal body temperature.
( D ) Both are suffering from fever.
Ans – ( C )
56.The normal temperature of human body is
( A ) 37 K
( B ) 37°F
( C ) 37°C
( D ) All of these
Ans – ( C )
57. Cooking Utensils Are Made Of Metals Because They Are
( A ) Durable
( B ) Malleable
( C ) Good conductors of heat
( D ) Do not break on heating
Ans – ( C )
58.In solids, heat transfer takes place primarily due to
( A ) conduction
( B ) convection
( C ) radiation
( D ) none of these
Ans – ( A )
59.Which of the following is a good conductor of heat?
( A ) Iron
( B ) Steel
( C ) Aluminium
( D ) All of these
Ans – ( D )