Label them as A, B and C. Put cold water in mug A and hot water in mug B. Combustion: On heating, some of the substance reach their ignition temperature and starts burning. HIGH BODY TEMP ALERT - Thermometer Forehead Reader has a built in fever alert alarm. Obviously, it is not convenient to use the laboratory thermometer for this purpose. Outside the bulb, a small shining thread of mercury can be seen. A clinical thermometer reads temperature from 35 oC to 42 oC. Hold it firmly and give it a few jerks. This is the temperature of water at that time. Then, how do we find out how hot an object really is? Tea is hot and ice is cold. Do you see a kink near the bulb (Fig-4). Ensure that it falls below 35 oC. How do we find out how hot or cold an object is? Your email address will not be published. The thermometer must be handled with care. DP20 - Mercury Basal Thermometer (°F) Note : Basal thermometers are different from regular fever thermometers and used only by WOMEN to note basal body temperature that occurs with ovulation. Wash the thermometer, preferably with an antiseptic solution. But is our sense of touch reliable? It could be slightly higher or slightly lower. Dip the laboratory thermometer in the water so that its bulb gets completely immersed in it, but make sure the bulb doesn’t touch the bottom of the beaker. Why does the mercury not fall or rise in a clinical thermometer when taken out of the mouth? The scale we use is the Celsius scale, indicated by o C. A clinical thermometer reads temperature from 35 o C to 42 o C. Suppose the bigger marks read one degree and there are five divisions between them. As a result of this, temperature of the body rises and body becomes hot. You might have wondered why particular types of clothes are suitable for a particular season. Observe the movement of mercury in the thermometer. In this chapter we shall try to seek answers to some of these questions. What did you record as your body temperature? The thermometer that measures our body temperature is called a clinical thermometer. Expansion due to heat is known as thermal expansion. Ensure that before use the mercury level is below 35°C. One should be careful while reading temperatures between 100 degrees and 101 degrees, because many people mistakenly record or report the tenth of a degree as a whole degree. Log in, Concise Mathematics Class 10 ICSE Solutions 2018, Click to share on WhatsApp (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Tumblr (Opens in new window), Click to share on Pinterest (Opens in new window). A laboratory thermometer, which is colloquially known as the lab thermometer, is used for measuring temperatures other than the human body temperature. Read the thermometer keeping the level of mercury along the line of sight. Do both the hands get the same feeling? You will also find a scale on the thermometer. It consists of a … Some of them are hot and some of them are cold. We see that some objects are cold while some are hot. 4.17). MCQ Questions for Class 11 Biology Chapter 22 Chemical Coordination and Integration with Answers, NCERT Solutions for Class 10 Maths Chapter 14 Statistics Ex 14.3, NCERT Solutions for Class 10 Maths Chapter 14 Statistics Ex 14.2, MCQ Questions for Class 11 Biology Chapter 21 Neural Control and Coordination with Answers, NCERT Solutions for Class 10 Maths Chapter 14 Statistics Ex 14.1, MCQ Questions for Class 11 Biology Chapter 20 Locomotion and Movement with Answers, MCQ Questions for Class 11 Biology Chapter 19 Excretory Products and their Elimination with Answers, NCERT Solutions for Class 10 Maths Chapter 13 Surface Areas and Volumes Ex 13.4, MCQ Questions for Class 11 Biology Chapter 18 Body Fluids and Circulation with Answers, NCERT Solutions for Class 10 Maths Chapter 13 Surface Areas and Volumes Ex 13.3, Concise Mathematics Class 10 ICSE Solutions. The clinical thermometer is designed to measure the temperature of human body only. No-contact thermometers are popular among pediatricians, as kids often squirm around when trying to get a temperature read, but it also holds true in mass temperature screenings. Also note down the number of divisions (shown by smaller marks) between these marks. You also know that some objects are hotter than others while some are colder than others. This bulb contains mercury. Mark these objects as hot or cold. Keeping the container wrapped in woollen material or inside a heat resistant container. You would need this information to read the thermometer correctly. Change in state of matter: On heating, most of the substances change its state, like solid to liquid, liquid to gas, etc. First, note the temperature difference indicated between the two bigger marks. These give us a feeling of coolness. First, note the temperature difference indicated between the … How to Measure Body Temperature by Thermometer Best thermometer … Rise in temperature: When a body absorbs heat, it gains energy. Take some tap water in a beaker or a mug. Observe a clinical thermometer again. Wait till the mercury thread becomes steady. A clinical thermometer reads temperature from 35 C to 42 C. (ii) Laboratory thermometer: This type of thermometer is used to measure the temperature of different objects in laboratories. Your teacher will show you this thermometer. It should not be held by the bulb while reading. However, some users report that the results are less accurate than with probe thermometers. We wear woollen clothes during winters when it is cold outside. How do we measure the temperature of other objects? 3). Then, one small division can read 1/5 =  0.2 oC. It ranges from -10˚C to 110˚C. (ii) As a result of heat exchange between two bodies, sum of their temperature before and after exchange is not same. Amrita Learning © 2020. For this purpose, there are other thermometers. A clinical thermometer looks like the one shown in Fig-1. It has a bulb at one end. If you come out in the sun, you feel warm. (i) It is proportional to average kinetic energy of the molecules of the body. Recall that when you or someone else in your family had fever, the temperature was measured by a thermometer. In summer, you feel hot even inside the house. How do we decide which object is hotter than the other? Let us find out. That is the reason that this thermometer has the range 35oC to 42oC. In our day-to-day life, we come across a number of objects. Woollen clothes keep us warm. Electronic ear thermometers are common. clinical thermometer One of a variety of devices for measuring and indicating the temperature of the human body. Plastic strip thermometers for the mouth are also available. Laboratory thermometers are designed for lab purposes such as checking boiling point, freezing point, or temperature of other substances. The temperature should always be stated with its unit, oC . One such thermometer is known as the laboratory thermometer. Let us now learn how this thermometer is used. We prefer to wear light coloured cotton clothes when it is hot. All Rights Reserved. A clinical thermometer consists of a long, narrow, uniform glass tube. It should be washed before and after use, preferably with an antiseptic solution.

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