Class 7 Science Chapter 4 MCQ

Class 7 Science Chapter 4 MCQ (Multiple Choice Questions) of Heat. These Multiple Choice Questions with four choices contains about 120 questions divided into 24 sets in the format of test series, updated for new academic session 2020-21.

All the questions are taken form NCERT Textbook and Exemplar books only. It covers the entire chapter 4 of grade 7 Science including all important terms.

Class 7 Science Chapter 4 MCQ for 2020-21

Contents:Multiple Choice Questions – MCQ Tests

Class 7 Science Chapter 4 MCQ Tests for 2020-21

Class 7 Science Chapter 4 MCQ are given below with explanation of each answer. There are sufficient number of tests to practice chapter 4 of 7th Science. These tests make a student confident about the concepts related to standard 7 Science. Give test and practice with important questions if required. If you have more questions to ask, please visit to Discussion Forum.


In which of the statement is or are correct about “thermometer”?

[A]. Don’t hold the thermometer by the bulb
[B]. Don’t washed thermometer by any liquid
[C]. Don’t jerks the thermometer before use
[D]. Don’t use clinical thermometer for the person who works in sunlight

Paheli wants to measure the body temperature of Boojho. She got 36.4 degree Celsius, 37.4 degree Celsius and 36.6 degree Celsius in first, second and third times respectively. What is the average body temperature of Boojho?

[A]. 37.8 degree Celsius
[B]. 36.4 degree Celsius
[C]. 37.4 degree Celsius
[D]. 36.8 degree Celsius


Which of the following statement is or are incorrect?

[A]. Joule (J) is the SI unit of Temperature.
[B]. Air, water and wood are the poor conductor of heat.
[C]. Movement of molecule of liquid possible through convection.
[D]. None of the above.

In which of the statement is or incorrect?

[A]. A clinical thermometer consists a non-uniform glass tube.
[B]. Thermometric liquids can be seen in clinical thermometer.
[C]. The temperature of every person may not be 37 degree Celsius.
[D]. All the above

Paheli wants to know about “heat”. Heat is

[A]. Form of energy
[B]. A type of matter
[C]. Neither energy nor matter
[D]. A form of fire

Paheli wants to know that is it possible to construct building which are not affected by heat?

[A]. Building made by soil
[B]. Wooden bricks are used in the building
[C]. Hollow bricks are used for making building
[D]. White colored cement bricks are used in building


An iron ball at 40 degree Celsius is dropped in a mug containing water at 40 degree Celsius. 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

Stainless steel pans are usually provided with copper bottoms. The reason for this could be

[A]. Copper bottom makes the pan more durable
[B]. Such pans appear colorful
[C]. Copper is a better conductor of heat than the stainless steel
[D]. Copper is easier to clean than the stainless steel


Once in a summer day, Paheli keeps an iron chair in sunlight. After few hours, iron chair gets heated because

[A]. Heat is transferred by conduction
[B]. Heat is transferred by convection
[C]. Heat is transferred by radiation
[D]. Heat is transferred by all the process

It is advised not to hold the thermometer by its bulb while reading it

[A]. Bulb can be burst
[B]. Thermometer will not work
[C]. Level of mercury decrease
[D]. None of the above

Thermos flask

Thermos flask is a special type of vessel which keeps hot liquids hot and cold liquids cold. It is made in such a way as to reduce the loss of heat by conduction, convection and radiation to minimum. It is a double walled glass vessel. The space between the two walls has no air in it. It is a vacuum indeed. The inside of the outer wall and outside of the inner wall are brightly polished with silver. The whole system is enclosed in a metal case. It is supported on corks or rubber pieces on all sides. The mouth too is closed with a cork.

How it Works

The vacuum between the walls prevents the flow of heat of conduction and convection. As for radiation, the brightly polished outer surface of the inner wall is a slow radiator of heat. The little heat that radiates is reflected back by the inner brighter surface of the outer wall. So, the hot liquid remains hot for a long time in the flask.

What is thermometer?

The device which measures the degree of hotness is called thermometer.

Which type of surfaces are good absorbers of heat?

Black and rough surfaces are good absorbers of heat.

Which type of surfaces are poor absorbers of heat?

White and smooth surfaces are poor absorbers of heat.

Which scale is used for measuring heat in scientific work?

Temperature is generally measured in Celsius or Fahrenheit scale. Kelvin scale is used for scientific work.