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Overview: Temperature & its Measurement Video Lecture | Science for Class 6

FAQs on Overview: Temperature & its Measurement Video Lecture - Science for Class 6

1. What is temperature and why is it important?

Ans.Temperature is a measure of the average kinetic energy of the particles in a substance. It is important because it affects physical properties such as state (solid, liquid, gas), density, and solubility. Additionally, temperature plays a crucial role in various scientific fields, including chemistry, physics, and biology, as it influences reactions and biological processes.

2. What are the different scales used to measure temperature?

Ans.The three most common temperature scales are Celsius, Fahrenheit, and Kelvin. The Celsius scale is used in most of the world and is based on the freezing point (0°C) and boiling point (100°C) of water. The Fahrenheit scale is primarily used in the United States, with freezing at 32°F and boiling at 212°F. The Kelvin scale is used in scientific contexts and starts at absolute zero (0 K), with one Kelvin unit equivalent to one degree Celsius.

3. How do thermometers work to measure temperature?

Ans.Thermometers work by utilizing materials that expand or contract with temperature changes. For example, a liquid-in-glass thermometer contains a liquid (usually mercury or colored alcohol) that expands when heated and rises in a calibrated glass tube. The level of the liquid corresponds to a specific temperature on the scale marked on the thermometer.

4. What are some common types of thermometers used today?

Ans.Common types of thermometers include digital thermometers, liquid-in-glass thermometers, infrared thermometers, and bimetallic thermometers. Digital thermometers provide quick readings and are often used for medical purposes. Liquid-in-glass thermometers are traditional and used for various applications. Infrared thermometers measure temperature from a distance and are useful for non-contact measurements. Bimetallic thermometers use metal strips that expand at different rates to gauge temperature.

5. What factors can affect temperature measurement accuracy?

Ans.Factors that can affect temperature measurement accuracy include the calibration of the thermometer, environmental conditions (such as humidity and air pressure), and the method of measurement (contact vs. non-contact). Additionally, the thermal conductivity of the substance being measured can influence the reading, as well as the placement of the thermometer in the environment or object being measured.

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Oct 02, 2025 Last updated

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