Temperature And Thermometers

What is Temperature?

• Temperature is a measure of hotness or coldness of an object
• The hotter an object is , the higher the temperature.

Celsius Scale

• Commonly used
• Measured in degrees celsius
• Two fixed point: Lower fixed point Ice point (0 celsius), Upper fixed piont: Steam point (100 celsius)

Ice Point : Temperature of pure melting ice

Steam poitn: temperature of steam above boiling water at standad atmospheric pressure

Fixed points are needed as Standard reference point so that other temperatures can be defined

SI unit of temperature is: Kelvin(K)

Convert celsius to kelvin (+273)

Convert kelvin to celsius (-273)

How does a Thermometer work?

• Thermometer uses a Phiysical Property that change steadily with temperature