When we come out in the sun, we feel …….. As glass is a poor conductor of heat, the wall of the bulb is kept thin so that transfer of heat between the Mercury and its surrounding can take place easily. So, he decided to take a leave on that day so that he could take some rest at his home. convection and conduction. Due to following reasons, mercury is used in the thermometers instead of water. A clinical thermometer should not be used for any object other than the human body. Explain how do we find out how hot an object really is. First of all, take a flat bottom flask and fix a rubber stopper having two holes in the mouth of the flask. Class 7 Science Chapter 4 MCQ for 2020-21 Class 7 Science Chapter 4 MCQ Tests for 2020-21 It includes all the questions that is asked mostly in school exams. Answer: Question 2. Question 1. Temperature of other object is measured with laboratory thermometer because clinical thermometer is not suitable for higher temperature. Our aim is to help students learn subjects like Match the Column I with Column II. Register online for Science tuition on Vedantu.com to score more marks in your examination. Answer: Important Terms to be Covered in Class 7 Science Chapter 4 1. Question 8. As we know that jute sacks is thermal insulators, it helps ice not to be melt immediately. (d) newspaper is at a higher temperature than the temperature of the surroundings Answer: So, this is a reason because of which the handle of a pressure cooker is covered with the thick plastic. . It is preferred to use two thin blankets rather than one thick blanket. You may have noticed that a few sharp jerks are given to clinical thermometer before using it. Question 20. All hot bodies radiate …….. Question 5. Explain why. Class 7 Science Chapter 2 Important Questions with answers of Nutrition in Animals updated for new academic session 2020-21. Answer: Answer: (d) None of the above Answer: Chapter 6: Physical and Chemical Changes. The prime aim of these NCERT Science Class 7 Chapter 10 Important Questions is to let the students know different types of formats to follow. Topics and Sub Topics in Class 7 Science Chapter 4 Heat: Section Name: Topic Name: 4: Heat: 4.1: Hot and Cold: 4.2: ... RD Sharma Class 7: CBSE Previous Year Question Papers Class 12: CBSE Previous Year Question Papers Class 10: NCERT Books: Maths Formulas: CBSE Sample Papers: Vedic Maths . refrigerator also gets cooled faster. DISCLOSURE: THIS PAGE MAY CONTAIN AFFILIATE LINKS, MEANING I GET A COMMISSION IF YOU DECIDE TO MAKE A PURCHASE THROUGH MY LINKS, AT NO COST TO YOU. [HOTSl These Class 6 Science Chapter 4 Extra Questions covers all the keywords given in NCERT Books. Question 15. An oxide is acidic and has a pungent odour. Four arrangements to measure temperature of ice in beaker with laboratory thermometer are shown in figure (a, b, c, d). Question 14. Explain the reason for the general fitting of air conditioner at higher level on the wall of the room. Question 18. If it kept in the sun or near a flame, then this clinical thermometer can be break. Answer: Answer: Give reason for your choice. The NCERT Solutions for Class 7 Science Chapter 4 Heat is one of the most crucial chapters in Class 7 Science. Answer: Question 5. Name the mode of transfer of heat in which medium is not required. Can she apply the same method to keep a glass of cold drink cool? Tea is generally served in China clay cup and plates because China clay is a bad conductor of heat which do not allow the heat to pass through it and hence keep the tea hot. Class 7 Science Chapter 4: Heat Extra Questions with Answers In this page we have Class 7 Science Chapter 4: Heat Extra Questions with Answers . He wants to measure the temperature of his body and that of boiling water. Answer: While on the other side, the water in the polar region remains cold and heavy. Answer: Explain in brief, why we wear dark coloured clothes in winter and light coloured clothes in summer. True. warm, Question 9. Below is the list of all the chapters - Chapter 1: Nutrition in Plants. 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. Answer: Class 7 Science Chapter 4 Extra Questions and Answers Heat Answer: Because of the kink present in the thermometer, the mercury does not fall or rise. After one hour he thought to check his fever through a clinical thermometer, so before using it, he washed it and started shaking it very fastly in his hand, so that the mercury level of thermometer gets reduced. Chapter 1 Nutrition in Plants Class 7 Extra Questions PLEASE READ MY DISCLOSURE FOR MORE INFO. Copper and aluminium are the examples of conductors which allow the heat to pass through them. hotness, Question 2. 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. Contents. Precautions while Reading the Thermometer. A. Water is being boiled in a pan of wide base. Explain why. Question 2. Question 2. (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. (a)A thermos flask is used to maintain the temperature of liquids kept in it. (ii) The clinical thermometer should be washed properly (before and after use). Answer: Heat travels in air through convection. Step III True. Briefly explain, why do the kites and eagles fly without flapping their wings. True, Question 7. (b)-(v), (c)-(ii), (d)-(iv), (e)-(i). At the same time, Pooja saw her and pushed her away from the hot fry pan. The mercury does not fall or rise in a clinical thermometer when taken out of the mouth. When the thermometer breaks, the mercury can be easily collected. (a) Paheli has a higher body temperature than Boojho. Students can study more about Air in Chapter 4 of CBSE Class 7 Geography. Describe briefly about the direction of the convection current during ventilation. While constructing a house in a coastal area, in which direction should the windows preferably face and why? Heat is a very basic topic that is necessary for the students to understand to score well in the exams and to face bigger … Meritnation.com gives its users access to a profuse supply of General Science (Solutions) questions and their solutions. This helped him to keep himself warm because [NCERT Exemplar] Answer: Briefly explain the maximum and minimum thermometers. Answer: Heat always flows Chapter 5: Acids, Bases and Salts. (b) The value showed by Pooja here is a great concern and careness towards her five years old small daughter. Why is it advised not to hold the thermometer by its bulb while reading it? clinical, Question 3. Answer: 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. We Database of more then 20K CBSE Tutors, Millions of CBSE Students, Teachers and Principals. Time – 05 Minutes. In all the solids, heat is transferred by the process of conduction, In all the liquids and gases, heat is transferred by the process of convection. The Mughal Empire Class 7 Extra Questions Social Science History Chapter 4 NCERT Extra Questions for Class 7 Social Science History Chapter 4 The Mughal Empire Prelude Question 1. The clinical thermometer cannot be used for measuring the temperature of any object more than 42°C (i.e. Which thermometer(s) should he choose? In coastal areas, cold air flows in the day from sea to land. Question 6. Question 16. Vishwas). MCQ Questions for Class 7 Science with Answers were prepared based on the latest exam pattern. Students can also use the CBSE Class 7 Geography Chapter 4 Air Important Questions to prepare most competently for the exam. poor, Question 1. (i) Land breeze blows during. Question 13. Answer: We have Provided Heat Class 7 Science MCQs Questions with Answers to help students understand the concept very well. True, Question 4. Differentiate between two modes of transfer of heat, i.e. The clinical thermometer consists of kink which prevents the mercury level from falling on its own. 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. Question 19. [NCERT Exemplar; HOTS] Match the following : (d) night. Question 8. Students can access the CBSE Class 7 Important Questions of Chapter 4 Geography from this article. NCERT Class 7 History Chapter 4 The Mughal Empire Extra Questions and Answers. (b) Mention the values showed by the elder brother of Pankaj (i.e. While reading the clinical thermometer, it should never be held by the bulb. Answer: MCQ Questions for Class 7 Social Science with Answers were prepared based on the latest exam pattern. Nutrition in Plants. Answer: (b) is polished while wooden tile is not polished Question 2. Why is it done so? We have Provided Growing up as Boys and Girls Class 7 Civics MCQs Questions with Answers to help students understand the concept very well. Question 3. It leads to the flow of convection currents of heat of warm water from the equator towards the poles. Answer: (c) in both the directions How do all living beings depend on the atmosphere for their survival? Question 15. The moment, when the heat is applied at the top, then the water present in the upper portion becomes hot and these hot water molecules get fixed over the surface. Answer: Paheli found her to be 98.6°F and Boojho recorded 37°C. 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. Answer: Subject : Social Science History. Since, the black bodies are better radiators, so due to this reason, radiators in cars are painted black. 37, Question 4. At the same time, his elder brother Vishwas scold him and suggested him to shake the thermometer slowly. Free PDF download of Important Questions with solutions for CBSE Class 7 Science Chapter 7 - Weather, Climate and Adaptations of Animals to Climate prepared by expert Science teachers from latest edition of CBSE(NCERT) books. (b) Paheli has a lower body temperature than Boojho. kink, Question 5. Briefly mention one application of kink in the clinical thermometer. A total of 18 chapters are taught in Class 7 Science. Due to this, the cold particles of water which are heavier come down along the sides of the vessel. Answer: Answer: So, as a result of this, convection of heat are setup in the air and the tower section of the . The freezer is located at the top of the refrigerator. (b) In which order, the pins at points P, Q and R fixed with the help of wax fall if points O, P, Q and R are equidistant from each other? So, shopkeepers used to cover ice blocks with jute sacks. In which case are both the pins likely to fall at different times? Question 10. (i) While reading the clinical thermometer, it should never be held by the bulb. Water and air are good conductors of heat. NCERT Exemplar Class 7 Science is very important resource for students preparing for VII Board Examination.Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 7. Answer: Question 4. (b) The flow of heat to P is a convection process and flow of heat to T is radiation. Jerks are given to clinical thermometer before using it to settle down the mercury level below normal temperature so that the measurement taken of a body be accurate. So that’s why, the fry pans are provided with the plastic handles. Answer: Question 1. It keeps hot liquids hot or cold liquids cold for a longer time. 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. The freezer is located at the top of the refrigerator. Answer: To rule over the vast territories of the Indian subcontinent was extremely difficult because […] (b) Fill up the boxes P and T to indicate the mode of flow of heat to the hand. On last Monday, Pankaj was dealing immense cough and cold. Also Check - CBSE Class 10 Science Important Questions & Answers for … You can use above books for extra knowledge and practicing different questions. (ii) A device to measure the degree of hotness. As in the given figures A and B, in case A P and Q got equal heat, so pin fix at P and Q in case of a fall simultaneously. At places where room temperature remains much below the range, setting of curd becomes difficult. (a) As in the given diagram, position P will feel warmer because of heat, air rises. poor, Question 7. [NCERT Exemplar] Answer: If we use it to measure high temperature, it may break and mercury present in the clinical thermometer is harmful. Thanks for visiting our website. Answer: It is the measure of how fast or slow the molecules are moving. There are some following precautions which are to be observed while reading a clinical thermometer. Besides this, he was suffering from a great headache. (c) reflects more heat than wooden tile Class 6 Science Chapter 4 Important Questions for extra practice and keywords explanation updated for new academic session 2020-21. We have Provided Air Class 7 Geography MCQs Questions with Answers to help students understand the concept very well. NCERT Exemplar Class 7 Science is very important resource for students preparing for VII Board Examination.Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 7. Chapter 4: Heat. . Question 1. 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