Earth Science Weather 1

• Melting: solid -> liquid
• Freezing: liquid -> solid
• Boiling: liquid -> gas
• Evaporation: liquid -> gas
• Condensation: gas -> liquid
• Sublimation: solid -> gas
• Deposition: gas -> solid
• All changes of state require a transfer of energy
• going from solid to gas absorbs heat
• going from gas to solid releases heat
• Hot air can hold more water vapor than cold air
• Relative humidity - how close the air is to being saturated
• Dewpoint - the temperature at which the air would be saturated
• The higher up you are, the lower the pressure
• Land heats up and cools down faster than water because of its lower specific heat
• Hot stuff rises because it is less dense, cold stuff sinks because it is more dense
• As air expands it gets cooler, as air compresses it gets warmer