Gr8 help…seriously..^-^.. Therefore, even the slightest change in temperature is notable. Remove the thermometer and check for the temperature on the display. It is a mathematical representation of heat. This means, if the heat is more, the temperature is more than well. Alcohol expands non-linearly over different range of temperatures. Then the number of the division of the mercury thread has crossed is noted (3 in this case). Heat is a form of energy and its unit is Joules. It is a long narrow glass tube with a bulb containing mercury at the end. Other Suggestions . Mercury reacts quickly to the temperature changes whereas alcohol reacts slowly. Digital thermometers can be considered to be advanced thermometers that are used for measuring body temperature. Note: Clinical thermometers must be sterilized before use for the safe and clean check-up. Laboratory Thermometer Laboratory thermometers cannot be used for clinical purposes because such thermometers read temperatures ranging from -10 oC to 110 oC, which is very high as compared to the human body temperature range. The level of mercury tells our body temperature in ˚C. For mercury thermometer: -39 to 357°C For alcohol-in-glass thermometer: -115 to 78°C; In colder countries, most of its liquid-in-glass thermometers use alcohol and not mercury. Hence, the clinical thermometers have the range 35˚C to 42˚C. Make sure the thermometer is not used for the ear containing a lot of wax. Factors that increase range would at the same time reduce its sensitivity. the bigger mark reads 10 and the number of division is 5, then each division reads the value equal to 10/5 = 20. They are easy to use, inexpensive, and accurate. There are different types of thermometers according to their needs. 3) Location Clinical thermometers are often used in various locations like houses, clinics, and hospitals while lab thermometers are mainly located in laboratories. We make sure that it falls below the 37⁰C mark or the 98⁰F mark, the normal human body temperature. Your email address will not be published. Your email address will not be published. We note the value of the bigger mark that the mercury thread has crossed (which is 98 in the Fig.4 Example 1). It acts as a magnifying glass. Watch the video below to understand the effect of temperature on matters surrounding us. Temperature and heat are two words that often confuse people. If the thermometer reading is 32℉ or 0℃, then the thermometer is said to be accurate. If you spot any errors or want to suggest improvements, please contact us. By definition, the temperature is the measurable extent of hotness or coldness. 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