Temperature Scales

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Temperature Scales
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What does temperature mean?

• Its a measure of the average kinetic energy of
  the particles in a substance.

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What are the three temperature scales?

• Celsius
• Fahrenheit
• Kelvin

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What is Celsius?

• Its the scale used by most of the world.
• At 0C, water freezes
• At 100C, water boils

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What is Kelvin?

• Its the scale used by scientists. Its 273
  units higher than Celsius.
• K C 273
• Water freezes at 273K
• Water boils at 373K
• There are no negative numbers.

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What is absolute zero?

• Its the lowest temperature that scientists have
  achieved.
• No particle movement everything stopped moving.
• Its the point at which no more energy can be
  removed from matter.
• Its 0K (-273C).

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What does thermal energy measure

• It measures the total energy of the particles in
  a substance.
• We use temperature to describe and compare
  thermal energy.
• Thermal energy is dependent upon the state of
  matter of a substance.
• Solid little energy
• Liquid medium energy
• Gas lots of energy