NCERT Solutions | Class 7 Science Chapter 4 | Heat

CBSE Solutions | Science Class 7

Check the below NCERT Solutions for Class 7 Science Chapter 4 Heat Pdf free download. NCERT Solutions Class 7 Science were prepared based on the latest exam pattern. We have Provided Heat Class 7 Science NCERT Solutions to help students understand the concept very well.

NCERT | Class 7 Science

NCERT Solutions Class 7 Science
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	7th
Subject:	Science
Chapter:	4
Chapters Name:	Heat
Medium:	English

Heat | Class 7 Science | NCERT Books Solutions

You can refer to MCQ Questions for Class 7 Science Chapter 4 Heat to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

ncert science class 7 solutions, Question 1.

State similarities and differences between the laboratory thermometer and the clinical thermometer.

ncert class 7 science Chapter 4 question answer, Answer :

Similarities:

Both contain mercury in bulbs.
Both use the Celsius scale on a glass tube.

Differences:

The temperature on the laboratory thermometer falls by itself, but not so in the clinical thermometer.
The range of a laboratory thermometer is much higher than a clinical thermometer.

ncert science class 7 textbook pdf, Question 2.

Give two examples each of conductors and insulators of heat.

cbse science class 7 solutions, Answer :

Conductors of heat: Copper, iron.
Insulators: Plastic, wood (dry).

NCERT Solutions for Class 7 Science, Question 3.

Fill in the blanks:

The hotness of an object is determined by its …….
The temperature of boiling water cannot be measured by a ………. thermometer.
Temperature is measured in degree …………
No medium is required for transfer of heat by the process of ………..
A cold steel spoon is dipped in a cup of hot milk. It transfers heat to its other end by the process of ………
Clothes of ……….. colours absorb heat better than clothes of light colours.

ncert class 7 science Chapter 4 question answer, Answer :

temperature
clinical
Celsius
radiation
conduction
dark

NCERT Solutions for Class 7 Science Chapter 4, Question 4.

Match the following:

(i) Land breeze blows during	(a) summer
(ii) Sea breeze blows during	(b) winter
(iii) Dark-coloured clothes are preferred during	(c) day
(iv) Light-coloured clothes are preferred during	(d) night

cbse science class 7 solutions, Answer :

(i) Land breeze blows during	(d) night
(ii) Sea breeze blows during	(c) day
(iii) Dark-coloured clothes are preferred during	(b) winter
(iv) Light-coloured clothes are preferred during	(a) summer

science class 7 Chapter 4, Question 5.

Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing.

ncert class 7 science Chapter 4 question answer, Answer :

If there are more than one layer of clothes, air would be trapped in between them. Air is a poor conductor of heat. This increases the insulation and thus comfortability of the clothes as a whole.

science class 7 pdf, Question 6.

Look at Fig., mark where the heat is being transferred by conduction, by convection, and by radiation.
Chapter 4 Heat Q.6

Fig. Heat transferred by conduction, by convection and by radiation

cbse science class 7 solutions, Answer :

In this figure, the heat is transferred at three points in different ways:

by radiation: from the flame to the bottom of the pan.
by conduction: from lower surface to upper surface of the pan.
by convection: from the base to the upper region of pan water.

cbse class 7 science book, Question 7.

In places of the hot climate, it is advised that the outer walls of houses be painted white. Explain.

ncert class 7 science Chapter 4 question answer, Answer :

Objects with white surfaces reflect more heat and absorb less. So, less heat from outside would enter the house.

cbse class 7 science Chapter 4, Question 8.

One liter of water at 30°C is mixed with one liter of water at 50°C. The temperature of the 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

cbse science class 7 solutions, Answer :

(d) between 30°C and 50°C.

cbse class 7 science notes pdf, Question 9.

An iron ball at 40°C is dropped in a mug containing water at 40°C. The heat will
(a) flow from the 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.

ncert class 7 science Chapter 4 question answer, Answer :

(b) not flow from iron ball to water or from water to iron ball.

cbse class 7 science syllabus pdf, Question 10.

A wooden spoon is dipped in a cup of ice cream. Its other end
(a) becomes cold by the process of conduction.
(b) becomes cold by the process of convection.
(c) becomes cold by the process of radiation.
(d) does not become cold,

cbse science class 7 solutions, Answer :

(d) does not become cold.

cbse science class 7 book, Question 11.

Stainless steel pans are usually 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.

ncert class 7 science Chapter 4 question answer, Answer :

(c) copper is a better conductor of heat than stainless steel.