The Kelvin scale is important in science because it starts at absolute zero, providing a direct measure of thermal energy. It is used in scientific calculations and studies involving temperature.
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Mercury thermometers are being phased out due to the toxicity of mercury. If broken, mercury can pose serious health and environmental risks.
Liquid-in-glass thermometers work by using the expansion and contraction of a liquid, like mercury or alcohol, inside a glass tube. The liquid’s level rises or falls as temperature changes.
Absolute zero is the lowest possible temperature, 0 Kelvin or -273.15°C, where molecular motion theoretically ceases entirely. It is a fundamental concept in thermodynamics.
The Kelvin scale is an absolute temperature scale starting at absolute zero (0 K). It is commonly used in scientific research and calculations.
The Fahrenheit scale is a temperature scale where water freezes at 32°F and boils at 212°F. It is primarily used in the United States and a few other countries.
The Celsius scale is a temperature scale where water freezes at 0°C and boils at 100°C. It is commonly used in most countries around the world.
Temperature is measured using thermometers, which can be liquid-in-glass, digital, or infrared. These devices detect temperature by measuring changes in a substance, such as mercury or alcohol, or using sensors.
The common units of temperature are degrees Celsius (°C), degrees Fahrenheit (°F), and Kelvin (K).
Digital clinical thermometers are powered by batteries. NCERT Book Curiosity Science Class 6 Chapter 7 Temperature and its Measurement