[NCERT Exemplar; HOTS] Explain. CBSE Class 7 Science Heat MCQs. Thermometer B will show a greater rise in temperature because heated air above the candle rises immediatly and increase the temperature of bulb of thermometer B quite greater than A. True, Question 7. 1800-212-7858 / 9372462318. Question 3. Education Franchise × Contact Us. the heat needed to increase the temperature of 1 gallon of water by 1 degree Fahrenheit. A laboratory thermometer A is kept 7 cm away on the side of the flame while a similar thermometer B is kept 7 cm above the flame of a candle as shown in figure. Answer: At the same time, his elder brother Vishwas scold him and suggested him to shake the thermometer slowly. Describe the effects of heat. Comment. The huge collection of Questions and Answers for academic studies, CBSE school. Nov 28, 2020 - Short & Long Question Answers - Heat Class 7 Notes | EduRev is made by best teachers of Class 7. Match the Column I with Column II. Q&A. It protects us from the harmful rays and scorching heat of the sun. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Since, with the help of ventilators, warm air being higher get rises up and leaves the room. This will clear students doubts about any question and improve application skills while preparing for board exams. The maximum and minimum temperature of the last day reported in weather reports in TV and newspapers are measured by the maximum and minimum thermometers. So, due to this reason, room heaters have shiny reflectors. Answer: Thermal energy is the sum of energy possessed by all the moving molecules of the substance, while temperature tells how hot or cold a substance is. 10:00 AM to 7:00 PM IST all days. Question 1. So, this is a reason because of which the handle of a pressure cooker is covered with the thick plastic. When we come out in the sun, we feel …….. B negative . Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Science for Class 7 so that you can refer them as and when required. A …… near the bulb of a clinical thermometer prevents mercury level from falling of its own. It is work on … Our NCERT Solutions provides you questions and answers which are arranged chapter-wise and help you to get good marks in your exams. Which of the following statements is true? Question 6. Passage - 1 Substances that conduct heat very well are called good conductors of heat or thermal conductors. Explain how do we find out how hot an object really is. Why is it done so? Question 1. (a) from a colder object to a hotter object Question 2. (b) Thermometer (i) for measuring temperature of both All the questions are taken form NCERT Textbook and Exemplar books only. Question 6: Look at Fig. There are following steps to read the temperature on a thermometer. Marking on clinical thermometer is from 0°C to 100°C. [HOTS] State similarities and differences between the laboratory thermometer and the clinical thermometer. This is how woolen garments keep the body warm in winter. (a) Which position P or T will feel warmer? Our notes of Chapter 4 Heat are prepared by Maths experts in an easy to remember format, covering all syllabus of CBSE, KVPY, NTSE, Olympiads, NCERT & other Competitive Exams. Be ensure that the mercury level before using the clinical thermometer should be below 35°C. (b) The values showed by the elder brother of Pankaj, Vishwas, are concern towards the way of using the clinical thermometer and the importance of money as well. (c) in both the directions C No sign . But in ease of winter, we should not use white fabric tent, we should use black fabric tent as it absorbs all colours of light from the sun and keeps us warm inside the tent. This solution contains questions, answers, images, explanations of the complete chapter 4 titled Heat From of Science taught in class 7. You may have noticed that a few sharp jerks are given to clinical thermometer before using it. Answer: Find detailed video answer solutions to NCERT Solutions Science , Class 7 Heat Exercise questions taught by expert teachers. When heat is transferred form hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by (a) conduction (b) convection (c) radiation (d) conduction and convection (e) convection and radiation. Answer: Mercury is good conductor of heat. For setting curd, a small amount of curd is added to warm milk. Answer 1 Similarities. (a) As in the given diagram, position P will feel warmer because of heat, air rises. Many people think that heat and temperature are related to each other, but they are different concepts as discussed in class. All the metals such as silver, copper, aluminum, iron, mercury and metal alloys such as brass, steel and stainless steel are good conductors of heat. No, the body temperature of every person is not 37°C. Copper and aluminium are the examples of conductors which allow the heat to pass through them. So, in the equatorial region, the ocean water expands and becomes lighter. Question from very important topics are covered by NCERT Exemplar Class 7.You also get idea about the type of questions and method to answer in your Class 7th examination. Question 4. Become our. Question 18. Answer: Question 11. DIRECTIONS: Read the passage given below an answer the questions that follow. 4.13 (in NCERT Text Book). Explain the reason for the following statement, “When heat is applied at the bottom of the water vessel, then Gently, hold the thermometer tube in your hand and give it a jerk in such a way that the mercury thread in the thermometer tube falls below the reading of 35°C. In order to read the temperature, hold the thermometer horizontally in your hand and rotate it slowly. So, this phenomenon is known as convection. Chapter – 4. Air is a good heat insulator. × Enroll For Free Now & Improve Your Performance. So, due to this convection of heat are set in the air and room gets warmer faster. Access free tutor videos and make learning fun on LIDO learning. View Answer … Answer: Explanation are given for understanding. Class 7 - Science - Heat . The fur traps air and forms an excellent heat insulating layer. Answer: Now, with the help of a vacuum pump, remove the air from the flask and try to record the temperature from the thermometer. Now, read the temperature on thermometer tube in level with the top of the mercury thread. Heat of the cold water flow from the poles towards the equator just below the surface of ocean. Question 2. Ans: D It depends on (a) Mass of body (b) change in temperature (c) Nature of substance. These solutions have been prepared by the rules and guidelines set by the CBSE Board and include comprehensive ideas with step by step explanations. Explain why. Lakhmir Singh and Manjit Kaur Science solution: Heat Chapter 4. These textbook solutions help students in exams as well as their daily homework routine. Answer: Question 7: In places of hot climate it is advised that the outer walls of houses be painted white. (ii) Heat sometimes acts as a catalyst to speed up the chemical reaction. Question 1. One made with black fabric and the other with white fabric. Question 19. Take our heat quiz and learn some new and interesting information about energy transfer, boiling points and what happens to water at freezing temperatures. Can she apply the same method to keep a glass of cold drink cool? Figure (a, b, c, d) shows a student reading of a doctor’s thermometer. What is gravitational force? Answer: Is the body temperature of every person 37°C? Here we give Chapter 4 all solution of class 7. Text Book – SCIENCE. About this quiz: All the questions on this quiz are based on information that can be found at Physics: Heat . Temperature is the measure of …….. of an object. Briefly explain, why do the kites and eagles fly without flapping their wings. At one end both of them have a … Due to following reasons, mercury is used in the thermometers instead of water. Exercise Questions . hotness, Question 2. Briefly explain the maximum and minimum thermometers. Answer: Match the Column I with Column II. Answer: (b)-(v), (c)-(ii), (d)-(iv), (e)-(i). (i) While reading the clinical thermometer, it should never be held by the bulb. TopperLearning’s Experts and Students has answered all of Heat of ICSE Class 7 Science questions in detail. Answer: Answer: Question 9. Download CBSE Class 7 Science Heat MCQs in pdf, Science chapter wise Multiple Choice Questions free, CBSE Class 7 Science Heat MCQs. Polar Bears that live in the cold Arctic region have thick layers of fur. Heat. CBSE class 7 worksheets as PDF for free download Heat worksheets. Question 34. Answer: The degree of hotness and coldness of a body is called temperature of body. For the setting of curd where temperature is below room temperature, the container in which curd is to be made must be kept in a thermally insulated cover or it can be wrapped with wool or jute sacks so that temperature is maintained for the setting of curd. This document is highly rated by Class 7 … Heat Quiz. Question 5. Thermodynamics MCQ Question with Answer Thermodynamics MCQ with detailed explanation for interview, entrance and competitive exams. Four arrangements to measure temperature of ice in beaker with laboratory thermometer are shown in figure (a, b, c, d). 4: (c) joule 5: (d) between 30°C and 50°C 6: (a) do not require any medium 7: (b) 32° F 8: (b) not flow from iron ball to water or from water to iron ball. The normal temperature of human body is …….. °C. 7 The amount of heat required to raise the temperature of a substance by 1°C is called: A. work capacity. Answer: [Value Based Question] It is because the air inside and around the compartments of freezer gets cool and move downwards and on the other side, the lesser cool air moves upward to get cooled. Precautions while Reading the Thermometer. Answer: NCERT Solutions for Chapter 4 Heat for Class 7. Sponsored Links. This keeps the body warm. Question 6. (iii) Heat can even kill the bacteria as well. The explanation of chapter with keywords and important topics are also given through videos. 37, Question 4. Question 1. All Heat Exercise Questions with Solutions to help you to revise complete Syllabus and Score More marks. Question 5. Explain. Thanks for visiting our website. Business Enquiry (North) … (b) Fill up the boxes P and T to indicate the mode of flow of heat to the hand. Contact. [NCERT Exemplar] Woollen fibre curls and forms air pockets. Question 5. Answer: Aluminium is a good conductor of heat. 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