exam 2 review - Evaporation liquid water into water vapor...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Evaporation – liquid water into water vapor Condensation – water vapor changes back into liquid forming clouds Precipitation – liquid cloud particles may grow in size and fall to surface Hydrologic cycle – cycle of moving and transforming water molecules from liquid to vapor and back to liquid again Transpiration – plants give up moisture Saturated – total number of molecules escaping from the liquid evaporating would be balanced by the number returning condensing Win enhances evaporation Condensation nuclei – water vapor condenses on microscopic bits of dust smoke and salt Condensation primarily occurs when the air is cooled Humidity refers to any one of the number of ways of specifiying the amount of water vapor in the air Water vapor density/ absolute humidity (g/m^3) Weight of water vapor compared to volume of air in parcel Specific humidity (g/m) Weight of water vapor in parcel compared with total weight of all the air in the parcel Mixing ratio (g/m) weight of water vapor compared with weight of dry air actual vapor pressure – partial pressure of water vapor on parcel high actual vapor pressure indicates large numbers of water vapor molecules whereas low actual vapor pressure indicates comparatively small numbers of vapor molecules saturation vapor pressure – how much water vapor is necessary to make the air saturated at a given temperature the pressure that the water vapor molecules would exert if the air were saturated with vapor at a given temperature RELATIVE HUMIDITY- ratio of the amount of water vapor actually in the air to the maximum amount of water vapor required for saturation at that particular temperature and pressure. Ratio of the airs water vapor content to its capacity RH = water vapor content/water vapor capacity = actual vapor pressure/saturation vapor pressure X 100 percent
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
change in relative humidty can be brought about by changing the airs water vapor content or by changing the air temperature dew point temperature – the temperature to which air would have to be cooled with no change in air pressure or moisture for saturation to occur dew point is a good indicator of the airs actual water vapor content. High dew
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

exam 2 review - Evaporation liquid water into water vapor...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online