NCERT Solutions for Class 7 Science Chapter 3 Question Answers FREE PDF Download
Unlock the comprehensive study with Vedantu through class 7 science chapter 3 NCERT Solutions. This gives access to the class 7 science chapter 3 question answers PDF elucidating fundamental principles crucial for understanding the subject's intricacies and topics such as temperature measurements, thermometers, heat transfer, etc.
Table of Content
By accessing class 7th science chapter 3, students gain comprehensive insights into the core concepts outlined in the curriculum. With a focus on clarity and depth, these resources serve as indispensable tools for students navigating through science class 7 science chapter 3 heat. NCERT Solutions for Class 7 Science are prepared by Vedantu experts according to the revised class 7 science syllabus.
1. State similarities and differences between the laboratory thermometer and the clinical thermometer.
Ans: Similarities include the use of mercury and the measurement of temperature.
Differences include clinical thermometers have a kink to prevent the temperature from dropping, but laboratory thermometers do not have a kink.
In comparison to clinical thermometers, the range of a laboratory thermometer is extremely broad.
2. Give two examples each of conductors and insulators of heat.
Ans:
3. Fill in the blanks:
a. A cold steel spoon is dipped in a cup of hot milk. It transfers heat to its other end by the process of ________.
Ans: Conduction.
b. Temperature is measured in degrees _________.
Ans: Celsius.
c. No medium is required for transfer of heat by the process of _________.
Ans: radiation.
d. Clothes of _________ colours absorb heat better than clothes of light colours.
Ans: black
e. The hotness of an object is determined by its _________.
Ans: Temperature.
f. Temperature of boiling water cannot be measured by a __________ thermometer.
Ans: clinical
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
Ans:
5. Discuss why wearing more layers of clothing during winter
Ans: When more than one layer of clothing is worn, air gets trapped between them. Heat does not transmit well through air. As a result, the insulation improves and we are more comfortable.
6. Look at Fig. 4.2. Mark where the heat is being transferred by conduction, by convection and by radiation.
Ans:
7. In places of hot climate, it is advised that the outer walls of houses be painted white. Explain.
Ans: White-surfaced objects radiate more heat and absorb less. As a result, less outside heat would enter the house.
8. One liter of water at 3000C is mixed with one liter of water at 5000C. The temperature of the mixture will be
a. 8000C
b. More than 5000C
c. 2000C
d. Between 3000C and 5000C
Ans: d. The temperature lies between 3000C to 5000C. As it is a mixture of waters boiled at two different temperatures.
9. An iron ball at 4000C is dropped in a mug containing water at 4000C 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. Not flow from iron ball to water or from water to iron ball. It is due to the fact that both the substances, the water and the iron have the same temperature.
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.
Ans: d. does not become cold. Heat conducts poorly through a wooden spoon. Its opposite end does not grow cold even if it is dipped in a cup of ice cream.
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 better conductor of heat than the stainless steel.
d. copper is a better conductor of heat than the stainless steel.
Ans: c. Copper is a better conductor of heat than stainless steel. Copper bottoms are commonly included with stainless steel cookware. Copper is a superior heat conductor than stainless steel, which could be the reason.
Topics Covered in Class 7th Science Chapter 3 Heat
Benefits of NCERT Solutions for Class 7 Science Chapter 3 - Heat
Vedantu is considered a reliable platform for various study tools for different classes under the CBSE board.
NCERT Class 7 science chapter 3 heat Solutions are tailored by experienced and skilled teachers who are committed to helping students.
The teaching approach helps students to learn the class 7 questions and answers faster and better.
NCERT Class 7 Science chapter 3 explains the topic well, such as how heat is a type of energy that causes a substance to become hot. In the winter, it is typical to feel cold inside the house and warm outside when exposed to the sun's rays.
Class 7th science chapter 3 embarks on a fascinating journey to understand the fundamental concepts of heat and its various aspects.
The study materials covered all NCERT class 7 science chapter 3 heat topics.
The solutions provided for Science Chapter 3 class 7 question answers are prepared by an expert faculty team to help improve, especially when fine-tuning becomes crucial before exams.
The heat chapter class 7 PDF questions and answers will provide an upper hand to compete on merit level.
Study Materials For Class 7 Science Chapter 3 - Heat
Conclusion
The NCERT Solutions for Class 7 Science chapter 3 offers a comprehensive and detailed understanding of the fundamental principles of heat and its various applications. Through class 7 science chapter 3 question answers, students have gained insights into concepts such as temperature, thermal expansion, modes of heat transfer, and the importance of heat in everyday life. By engaging with these solutions, students have strengthened their theoretical knowledge and developed practical problem-solving skills.
NCERT Solutions for Class 7 Science - Chapter-wise Link for FREE PDF
Dive into our collection of FREE PDF links offering chapter-wise NCERT solutions, prepared by Vedantu Experts to help you understand and master fundamental scientific concepts.
Related Study Material Class 7 Science
FAQs on NCERT Solutions for Class 7 Science Chapter 3 Heat
1. What is heat as explained in NCERT Solutions for Class 7 Science Chapter 3?
Heat is defined as a form of energy that is transferred from a hotter object to a colder one due to a temperature difference. This process continues until both objects reach the same temperature, achieving thermal equilibrium.
2. How do laboratory thermometers and clinical thermometers differ according to class 7 NCERT Solutions?
Laboratory thermometers usually have a wide temperature range and do not feature a kink, while clinical thermometers are designed for measuring human body temperature, have a narrow range, and include a kink to prevent the mercury from falling quickly.
3. According to the Class 7 Science Chapter 3 NCERT Solutions, why is air trapped between layers of clothing during winter?
When multiple layers of clothing are worn, air gets trapped between them. Air is a poor conductor of heat, so it acts as an insulator and reduces heat loss from the body, keeping us warmer in winter.
4. What examples of conductors and insulators does NCERT Solutions for Class 7 Science Chapter 3 provide?
- Conductors: Copper and iron
- Insulators: Rubber and ceramic
5. Which process allows heat transfer from the Sun to the Earth according to NCERT Class 7 Science Chapter 3?
Radiation is the process by which heat from the Sun reaches Earth. It does not require any medium for transfer.
6. Why is the outer wall of houses in hot climates often painted white as per NCERT Solutions for Class 7 Science?
White surfaces absorb less heat and reflect more sunlight, which helps keep the interiors of houses cooler in hot climates.
7. What is a thermometer according to NCERT Solutions for Class 7 Science Chapter 3 Heat?
A thermometer is an instrument used to measure temperature. Common thermometers for scientific or domestic use are laboratory, clinical, and digital thermometers.
8. What would happen if an iron ball at 40°C is placed in water at 40°C? (as per NCERT Class 7 Science Chapter 3)
No heat transfer will occur between the iron ball and the water because both are at the same temperature; heat flows only when there is a temperature difference.
9. Why are cooking pans usually made with copper bottoms, as explained in Class 7 Science Chapter 3 NCERT Solutions?
Copper is a better conductor of heat than many other metals. Copper bottoms allow for faster and more even heating of cooking pans.
10. How is heat transferred through a metal spoon placed in hot liquid as per Class 7 Science Chapter 3 NCERT Solutions?
Heat is transferred from the hot end of the metal spoon to the cold end by the process of conduction.
11. What is the main difference between conduction and convection as per Class 7 NCERT Solutions?
Conduction transfers heat through direct contact in solids, while convection involves the movement of fluids (liquids or gases) carrying heat as they move from one place to another.
12. According to NCERT Solutions for Class 7 Science Chapter 3, can heat be created or destroyed?
Heat cannot be created or destroyed; it can only be transferred from one body to another or changed into other forms of energy, as per the Law of Conservation of Energy.
13. Why is a wooden spoon preferred for stirring hot food as per NCERT Class 7 Science Chapter 3?
Wood is a poor conductor of heat (an insulator), so its end does not become hot quickly, making it safe to handle while stirring hot foods.
14. What are the key modes of heat transfer explained in NCERT Solutions for Class 7 Science Chapter 3?
The three modes of heat transfer are:
- Conduction
- Convection
- Radiation
15. How should students use NCERT Solutions for Class 7 Science Chapter 3 to prepare for exams?
Students should use NCERT Solutions to understand concepts, clarify doubts, and practice the provided stepwise answers so they follow the correct method as per the CBSE 2025–26 syllabus.
