Energy

GRADE





Measurement of Energy

Temperature and Heat

Heat is the result of the movement of matter. Temperature is the measure of this movement of matter. You can tell the difference between temperature in the winter and summer. Winter is cold and summer is hot. You test the temperature of hot soup by blowing on it and then taking quick tastes.

But what is you wanted an exact measurement of temperature? What if you wanted to know exact numbers instead of just someone else's observations? A thermometer is an instrument used for measuring temperature. When you are sick, someone checks your temperature using a thermometer. When it is in your mouth, the heat in your mouth causes the liquid inside the glass column to expand and rise. If you were stick the thermometer in ice water, the cold temperature would cause the liquid inside to shrink and fall.

A scale is used to measure the rise and fall of the liquid which is usually the element mercury. One scale is called the Fahrenheit scale name after the scientist Fahrenheit. On the Fahrenheit scale, water freeezes at 32 degrees Fahrenheit and boils at 212 degrees Fahrenheit. Another scale that is used nost often all over the world is the Celsius scale. Water freezes at 0 degrees Celsius and boils at 100 degrees Celsius.

What takes longer to boil? A cup of water at room temperature or a bucket of water at room temperature?

Temperature is the measure of heat energy or motion of particles. Absolute zero is the temperature at which all motion of particles stops. Absolute zero is the lowest possible temperature. Absolute zero is -273 degrees on the Celsius scale. The Kelvin temperature scale is based on absolute zero. To convert from degrees Celsius to Kelvins, add 273 to the Celsius temperature.

What is the boiling point of water in Kelvin?
  • First, if you cannot add in your head or you don't have paper in front of you, click for a calculator.
  • Now, what is the boiling point of water on the Celsius scale? Remember or type it into the calculator.
  • Add 273 degrees to the boiling point of water in degrees Celsius.
  • Your answer should be 373 degrees Kelvin. 100 + 273=373

Try these:the freezing point of water in degrees Kelvin and 23 degrees Celsius in degrees Kelvin.





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Pages and gif animations written and designed by Sheila M. Estacio. Please send comments, praises, gripes, questions to sme2446@is2.nyu.edu