9394949438

[LATEST]$type=sticky$show=home$rm=0$va=0$count=4$va=0

NCERT Solutions for Class 7 Science Chapter 4 Heat

NCERT solutions for class 7 science chapter 4 heat exercise:

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

Answer:

Similarities:-
i) In both laboratory thermometer and clinical thermometer, mercury is used

ii) Both laboratory and clinical thermometer consist of a long, narrow uniform tube of glass.

Differences:-

i) The least count of both the thermometer is different.

ii) Range of the temperature in a laboratory thermometer is from -10\degree C \ to \ 110\degree C whereas in clinical thermometer, it is from 35\degree C \ to \ 42\degree C

iii) Clinical thermometer is used to measure body temperature whereas laboratory thermometer is not used for such purposes

2. Give two examples each of conductors and insulators of heat.

Answer:

Two examples of

i) Conductor :-
1) Copper
2) Aluminium

ii) insulator:-
1) Plastic
2) Wood

3. Fill in the blanks :

(a) The hotness of an object is determined by its __________.

(b) Temperature of boiling water cannot be measured by a _____________ thermometer.

(c) Temperature is measured in degree ______________.

(d) No medium is required for transfer of heat by the process of __________.

(e) A cold steel spoon is dipped in a cup of hot milk. Heat is transferred to its other end by the process of ______________.

(f ) Clothes of ______________ colours absorb more heat better than clothes of light colours.

Answer:

a) The hotness of an object is determined by its temperature.

b) Temperature of boiling water cannot be measured by a clinical thermometer.

c) Temperature is measured in degree celsius.

d) No medium is required for transfer of heat by the process of radiation.

e) A cold steel spoon is dipped in a cup of hot milk. Heat is transferred to its other end by the process of conduction.

f) Clothes of dark colours absorb more heat better than clothes of light colours.

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

Answer:

These are the correct match

i) Land breeze blows durin \rightarrow (d) night

ii) Sea breeze blows during \rightarrow (c) day

iii) Dark coloured clothes are preferred during \rightarrow (b) winter

iv) Light coloured clothes are preferred during \rightarrow (a) summer


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

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

Answer:

During winters, wearing more layers of clothing keeps us warmer more than compared to wearing just one thick piece of clothing because air gets trapped in between the layers of various clothes and as being a bad conductor of heat, air prevents heat loss from our body.

Because of that, wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing.

6. Look at Fig. 4.13. Mark where the heat is being transferred by conduction, by convection and by radiation.

Answer:

Three stages are:-

i) Transfer of heat from the burner to the pan takes place through radiation.

ii) Transfer of heat from the pan to water is taking place through conduction.

iii) Transfer of heat within water is take place through convection.

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

Answer:

In places of hot climate, it is advised that the outer walls of houses be painted white because white is a light colour and because of that it reflects back most of the heat that falls on it and a very less amount of heat is absorbed by the walls.
Therefore, a light colour tends to keep the house cool.

8. One litre of water at 30°C is mixed with one litre 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

Answer:

If one litre of water at 30\degree C is mixed with one litre of water at 50\degree C . Then, the temperature of the mixture will be

(d) between 30\degree C and 50\degree C

Because as the volume of both the liquids with temperature 30\degree C and 50\degree C is equal. Therefore, when we add both the liquids there is transferred of heat take place from a liquid with high temperature to a liquid with a low temperature. That's why temperature is between 30\degree C and 50\degree C

9. 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.

Answer:

If an iron ball at 40\degree C is dropped in a mug containing water at 40\degree C . Then, the heat will

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

Because heat will flow from an object with high temperature to an object having a low temperature. But here the temperature of both liquid and iron ball is the same.
Therefore, no flow of heat takes place

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.

Answer:

If a wooden spoon is dipped in a cup of ice cream. Then, its other end

(d) does not become cold.

Because wood is a bad conductor of heat.
Therefore, no or very very less transfer of heat takes place.

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 the stainless steel.

(d) copper is easier to clean than the stainless steel.

Answer:

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

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


 

Chapter No. Chapter Name
Chapter 1 NCERT solutions for class 6 Science Chapter 1 Food: Where Does It Come From?
Chapter 2 NCERT solutions for class 6 Science Chapter 2 Components of Food
Chapter 3 NCERT Solutions for class 6 science chapter 3 Fibre to Fabric
Chapter 4 NCERT Solutions for class 6 science chapter 4 Sorting Materials into Groups
Chapter 5 NCERT Solution for class 6 science chapter 5 Separation of Substances
Chapter 6 NCERT solutions for class 6 science chapter 6 Changes around Us
Chapter 7 NCERT solutions for class 6 science chapter 7 Getting to Know Plants
Chapter 8 NCERT Solutions for class 6 science chapter 8 Body Movements
Chapter 9 NCERT solutions for class 6 science chapter 9 The Living Organisms Characteristics and Habitats
Chapter 10 NCERT Solution for class 6 science chapter 10 Motion and Measurement of Distances
Chapter 11 NCERT solution for class 6 science chapter 11 Light, Shadows, and Reflections
Chapter 12 NCERT solutions for class 6 science chapter 12 Electricity and Circuits
Chapter 13 NCERT solutions for class 6 science chapter 13 Fun with Magnets
Chapter 14 NCERT Solution for class 6 science chapter 14 Water
Chapter 15 NCERT solutions for class 6 Science Chapter 15 Air Around Us
Chapter 16 NCERT Solutions for Class 6 Science Chapter 16 Garbage In, Garbage Out

Study Resources Quick Links

Want to know more

Want to Know More
Please fill in the details below:

INNER POST ADS

Latest IITJEE Articles$type=three$c=3$author=hide$comment=hide$rm=hide$date=hide$snippet=hide

Latest NEET Articles$type=three$c=3$author=hide$comment=hide$rm=hide$date=hide$snippet=hide

Name

Admissions,1,Alternating Current,60,AP EAMCET 2020,1,Basic Maths,2,BCECE 2020,1,best books for iit jee,2,best coaching institute for iit,1,best coaching institute for iit jee preparation,1,best iit jee coaching delhi,1,best iit jee coaching in delhi,2,best study material for iit jee,4,BITSAT Registration 2020,1,Blog,62,books for jee preparation,1,books recommended by iit toppers,3,Capacitance,3,CBSE,1,CBSE accounts exam,1,CBSE boards,1,CBSE NEET,9,cbse neet 2019,3,CBSE NEET 2020,1,cbse neet nic,1,Centre of Mass,2,Chemistry,58,Class 12 Physics,15,coaching for jee advanced,1,coaching institute for iit jee,2,Collision,2,COMEDK UGET 2020 Application Form,1,COMEDK UGET 2020 Exam Form,1,COMEDK UGET news,1,CUCET 2020,2,Current Electricity,4,CVR college,1,Electromagnetic Induction,3,Electronics,1,Electrostatics,3,Energy,1,Fluid Mechanics,4,Gravitation,2,GUJCET 2020 Application Form,1,Heat,4,iit admission,1,iit advanced,1,iit coaching centre,3,iit coaching centre in delhi,2,iit coaching classes,2,iit coaching in delhi,1,iit coaching institute in delhi,1,iit entrance exam,1,iit entrance exam syllabus,2,iit exam pattern,2,iit jee,5,iit jee 2019,3,iit jee advanced,2,iit jee books,3,iit jee coaching,2,iit jee exam,3,iit jee exam 2019,1,iit jee exam pattern,3,iit jee institute,1,iit jee main 2019,2,iit jee mains,3,iit jee mains syllabus,2,iit jee material,1,iit jee online test,3,iit jee practice test,3,iit jee preparation,6,iit jee preparation in delhi,2,iit jee preparation time,1,iit jee preparation tips by toppers,2,iit jee question paper,1,iit jee study material,3,iit jee study materials,2,iit jee syllabus,2,iit jee syllabus 2019,2,iit jee test,3,iit preparation,2,iit preparation books,5,iit preparation time table,2,iit preparation tips,2,iit syllabus,2,iit test series,3,IITJEE,100,IPU CET,1,JEE Advanced,83,jee advanced exam,2,jee advanced exam pattern,1,jee advanced paper,1,JEE Books,1,JEE Coaching Delhi,3,jee exam,3,jee exam 2019,6,JEE Exam Pattern,2,jee exam pattern 2019,1,jee exam preparation,1,JEE Main,85,jee main 2019,4,JEE Main 2020,1,JEE Main 2020 Application Form,2,JEE Main 2020 news,2,JEE Main 2020 Official Answer Key,1,JEE Main 2020 Registration,1,JEE Main 2020 Score,1,JEE Main application form,1,jee main coaching,1,JEE Main eligibility criteria,3,jee main exam,1,jee main exam 2019,3,jee main online question paper,1,jee main online test,3,JEE Main Paper-2 Result,1,jee main registration,2,jee main syllabus,2,JEE mains 2020,1,jee mains question bank,1,jee mains test papers,3,JEE Mock Test,2,jee notes,1,jee past papers,1,JEE Preparation,2,jee preparation in delhi,1,jee preparation material,4,JEE Study Material,1,jee syllabus,6,JEE Syllabus Chemistry,1,JEE Syllabus Maths,1,JEE Syllabus Physics,1,jee test series,3,KCET - 2020,1,Kinematics,1,Latest article,5,Latest Articles,61,Latest News,34,latest news about neet exam,1,Laws of Motion,2,Magnetic Effect of Current,3,Magnetism,3,MHT CET 2020,2,MHT CET 2020 exam schedule,1,Modern Physics,1,NCERT Solutions,15,neet,3,neet 2019,1,neet 2019 eligibility criteria,1,neet 2019 exam date,2,neet 2019 test series,2,NEET 2020,2,NEET 2020 Application Form,1,NEET 2020 Eligibility Criteria,1,NEET 2020 Registration,1,neet application form,1,neet application form 2019 last date,1,Neet Biology Syllabus,1,Neet Books,3,neet eligibility criteria,3,neet exam 2019,7,neet exam application,1,neet exam date,1,neet exam details,1,neet exam pattern,6,neet exam pattern 2019,2,neet examination,1,neet mock test 2019,1,Neet Notes,3,Neet Online Application Form,3,neet online test,2,neet past papers,1,neet physics syllabus,1,neet practice test,2,NEET preparation books,1,neet qualification marks,1,NEET question paper 2019,1,neet question papers,1,neet registration,1,Neet Study Material,3,neet syllabus,6,neet syllabus 2019,5,NEET Syllabus 2020,1,neet syllabus chemistry,1,neet syllabus for biology,1,neet syllabus for physics,1,neet test series,1,neet ug 2019,2,news,5,online study material for iit jee,1,Optical Instruments,1,Physics,110,physics books for iit jee,1,Power,1,Practical Physics,1,Quiz,5,Ray Optics,1,Rotational Motion,3,SHM,3,Simple Harmonic Motion,3,study materials for iit jee,1,Study Notes,110,study notes for iit jee,1,Thermodynamics,4,TS EAMCET Notification,2,Units and Dimensions,1,UPSEE 2020,1,UPSEE 2020 Application Form,2,UPSEE EXAM,1,Vectors,2,VITEE Application form,1,Wave Motion,3,Wave Optics,1,WBJEE 2020 Admit Card,1,WBJEE 2020 Answer Key,1,Work,1,
ltr
item
Best IIT JEE Coaching Institute in Delhi | NEET Coaching Institute in Delhi: Class 7 Science Chapter 4 Heat
Class 7 Science Chapter 4 Heat
https://1.bp.blogspot.com/-EVSiTZJG_vI/X2xwtTWjqNI/AAAAAAAAAS8/ognCJF3xz8wes30akDiDByvBPtQoITX9wCNcBGAsYHQ/s320/Cleariitmedical%2BAcademic%2BTemplate%2BImage.pptx%2B%25283%2529%2B%25281%2529.jpg
https://1.bp.blogspot.com/-EVSiTZJG_vI/X2xwtTWjqNI/AAAAAAAAAS8/ognCJF3xz8wes30akDiDByvBPtQoITX9wCNcBGAsYHQ/s72-c/Cleariitmedical%2BAcademic%2BTemplate%2BImage.pptx%2B%25283%2529%2B%25281%2529.jpg
Best IIT JEE Coaching Institute in Delhi | NEET Coaching Institute in Delhi
https://www.cleariitmedical.com/2020/09/NCERT-Solutions-for-Class-7-Science-Chapter-4-Heat.html
https://www.cleariitmedical.com/
https://www.cleariitmedical.com/
https://www.cleariitmedical.com/2020/09/NCERT-Solutions-for-Class-7-Science-Chapter-4-Heat.html
true
7783647550433378923
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS CONTENT IS PREMIUM Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy