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This is known as Conduction. (Refer fig 4.3 in the text p.no. Mark where the heat is being transferred by conduction, by convection and by radiation. The materials which allow heat to pass through them easily are Conductors, eg : All metals. It has a bulb at one end. Question 9. What are Conductors ? What are Insulators ? How do you measure the temperature of the person ? Define radiation with an example. At night the water cools down more slowly than the land. Insulators : wood and plastic. Heat the other end of the rod by a candle. give example. (a) becomes cold by the process of conduction. The temperature should always be stated with its unit °C. 4. Question 14. Fill in the blanks : Mercury is used in both thermometers to measure temperature. Similarities: Question 2. Answer: Notify me of follow-up comments by email. Students can Download Chapter 4 Heat Questions and Answers, Notes Pdf, KSEEB Solutions for Class 7 Science, Karnataka State Board Solutions help you to revise complete Syllabus and score more marks in your examinations. (c) flow from water to iron ball. How do you measure the temperature of the liquid ? 4.13. Explain. It has a scale from 35°C to 42°C. (d) does not become cold, Question 11. Question 11. It is the land breeze. In places of hot climate it is advised that the outer walls of houses be painted white. Answer: So wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing. (d) copper is easier to clean than the stainless steel. (b) more than 50°C but less than 80°C The process by which heat is passed from the hotter end to colder end in solids. The Jerks will bring the level of mercury down. Draw the neat diagram and Label the parts. Clinical thermometers are meant for clinical purposes. A clinical thermometer consists of a long, narrow, uniform glass tube. More layers of thin clothes will allow more air to get trapped and as a result we will not feel cold. Lesson Plan in Mathematics Grade 5 Grade V – Acacia (7:50-8:50) Molave (8:50-9:50) I. Answer: Question 2. Poor conductors are known as insulators. Question 3. Answer: Answer: Heat is always transfer from hot, bodies to cooled bodies. Answer: The temperature of the mixture will be The Sun heat is also transfer through radiation because most part of the space between the earth and the Sun there is no media or air. Fix a few small wax pieces on the rod. This is the temperature of that person. Clinical Thermometer. Write a neat diagram of clinical thermometer and label the parts. Take the liquid in a beaker. This is Celsius scale, indicated by 0°C. Answer: Laboratory thermometer has temperature range from -10°C to 110°C where as clinical thermometer has temperature range from 35°C to 42°C. (b) Temperature of boiling water cannot be measured by a Clinical thermometer thermometer. Question 8. Hold the thermometer vertically. Hold it firmly, give it a few jerks. Observe the movement of mercury in the thermometer, wait till the mercury thread becomes steady. The transfer of heat without any media is called Radiation. Both have Celsius and fahrenheit markings. (e) A cold steel spoon is dipped in a cup of hot milk. Why a clinical thermometer has a kink? Fill it with $$\frac{2}{3}$$ part of water. (c) copper is a better conductor of heat than the stainless steel. to the surroundings is radiation. Question 1. What are the precautions should we take while using the clinical thermometer ? Label the parts of the thermometer using the words from the box. State similarities and differences between the laboratory thermometer and the clinical thermometer. In a clinical thermometer kink plays an important role. The normal human body temperature is 37˚C; which can fluctuate between the ranges 35˚C to 42˚C. The other equipments should arrange as in the figure. (d) increase the temperature of both. Read the thermometer keeping the level of mercury along the line of sight. Heat the water by placing the candle just below the flask. Thermometer should be washed before and after use, preferably with an antiseptic solution. Eg : Wood, plastic etc.. (d) between 30°C and 50°C. This bulb contains mercury. Question 5. Question 3. The use of the thermometer depends very much on the reason why it was manufactured. Write a neat diagram of clinical thermometer and label the parts. Question 10. Question 9. Question 5. The air gets trapped between two layers of warm clothes. draw a neat and labelled diagram of a laboratory thermometer - Physics - TopperLearning.com | 99cxqufyy All metals are good conductors of Heat. Draw the diagram of a clinical thermometer and label its part what is the use of kind in clinical thermometer - 5292232 Its other end 1. Answer: Define Land breeze. This bulb contains mercury. Parts of a thermometer 1. This experiment shows that heat is transferred from the hotter end to the colder end. Question 12. It transfers heat to its other end by the process of Conduction. A clinical thermometer is used to measure body temperature. Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing. Answer: During the day the land gets heated faster than the water. The normal temperature of human body is 37°C. Take a round bottom flask. Laboratory thermometer is used to measure temperature of different objects in factories and laboratory where as clinical thermometer is used to measure the temperature of human beings only. Define Conduction. Question 6. iii – b, (a) The hotness of an object is determined by its Temperature. The digital thermometer do not use mercury. Working principle of both the thermometer is same. Save my name, email, and website in this browser for the next time I comment. The reason for this could be that The cold water from the sides moves down towards the source of heat. Answer: The heat from the candle side passes towards the other end by dissolving wax pieces on the rod. The materials which do not allow heat to pass through them easily are poor conductors or insulators. This is called the Sea breeze. (b) not flow from iron ball to water or from water to iron ball. Answer: Answer: If it hits against some hard object, it can break. This is the temperature of the given liquid at that time. The heat will Note the reading. Transfer of heat within water is by convection. Dip the thermometer in the liquid so that the bulb is immersed in the liquid but does not touch the bottom or the sides of the container. Question 1. Observe when water is heated near the flame gets hot and rises up. It has a bulb at one end. (f) Clothes of Dark colours absorb heat better than clothes of light colours. This process continues till the whose water gets heated. Stainless steel pans are usually provided with copper bottoms. Now place the thermometer under the tongue of the person. Transfer of heat from hot bodies like pan, plate, burner etc. Answers: Write the construction of clinical thermometer. (c) becomes cold by the process of radiacios. Ensure that before use the mercury level is below 35°C. 6. Answer: (a) copper bottom makes the pan more durable. Answer: 37). It is a long narrow glass tube with a bulb containing mercury at the end. ii – c, (d) does not become cold., Transfer of heat from hot plate to pan is by conduction. (c) 20°C (b) such pans appear colourful. Answer: Ensure that it falls below 35°C. i – d, Answer: (b) not flow from iron ball to water or from water to iron ball. Answer: Question 7. Question 8. Question 6. This mode of heat transmission is known as Convection. The hot air rises up and cooler air from the sea rushes towards the land. Give two examples each of conductors and insulators of heat So the cool air from the land moves towards the sea. Air acts as insulator of heat. Answer: Question 4. Learning Objectives Cognitive: Identify the parts of the thermometer Psychomotor: Draw and label the parts of a thermometer Affective: Tell the importance of … Write the construction of clinical thermometer. Draw a neat diagram and explain the flow of heat through a metal strip.

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