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Measuring Temperature - Laboratory Thermometer Video Lecture | Crash Course for Class 6
FAQs on Measuring Temperature - Laboratory Thermometer Video Lecture - Crash Course for Class 6
| 1. What is a laboratory thermometer and how does it work? |  |
Ans. A laboratory thermometer is an instrument used to measure the temperature of substances in a controlled environment, such as a laboratory. It typically consists of a glass tube filled with a liquid, usually mercury or colored alcohol, which expands and rises in the tube as the temperature increases. The thermometer has a calibrated scale that allows users to read the temperature accurately.
| 2. What is the difference between a laboratory thermometer and a clinical thermometer? | |
Ans. The main difference between a laboratory thermometer and a clinical thermometer lies in their design and purpose. A laboratory thermometer is designed for a wide range of temperatures and is used in scientific experiments, while a clinical thermometer is specifically designed to measure human body temperature and typically has a narrower range. Clinical thermometers also have a more sensitive scale for detecting slight changes in body temperature.
| 3. How do you read a laboratory thermometer correctly? | |
Ans. To read a laboratory thermometer, first ensure that the thermometer is vertical and stable. Look at the meniscus, which is the curved surface of the liquid in the tube. Read the scale at the bottom of the meniscus for accuracy. Make sure to hold the thermometer at eye level to avoid parallax error and to get an accurate reading.
| 4. What are the common temperature ranges measured by a laboratory thermometer? | |
Ans. Laboratory thermometers can measure a wide range of temperatures, typically from -10°C to 110°C or higher, depending on the specific type of thermometer. Some specialized thermometers can measure even lower or higher temperatures, such as cryogenic or high-temperature thermometers, which can be used for extreme conditions.
| 5. Why is it important to calibrate a laboratory thermometer? | |
Ans. Calibrating a laboratory thermometer is important to ensure accurate measurements. Over time, thermometers can give incorrect readings due to factors like wear and tear or changes in the liquid inside. Calibration helps to adjust the thermometer to ensure that it gives precise readings within the specified range, which is crucial for scientific experiments and research.
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