Chapter 10, Lesson 4

Water Vapor and

Humidity

water vaporhumidity

relative humiditytranspiration

cloud formationthermal

convectionmeteorologist

water vapor - water in its gas form is water vapor. If you can see it, it’s

not really water vapor!

humidity – the level of moisture in the air; the amount of water

vapor in the air

relative humidity – is when you compare how much water vapor

is in the air to how much it COULD hold

dew point – point when the air is completely saturated with

moisture and can hold no more.

transpiration –watery vapor passed through a membrane or

pores in a plant

transpiration –watery vapor passed through a membrane or

pores in a plant

cloud formation – the way clouds form

cloud formation – the way clouds form

cloud formation – the way clouds form

cloud formation – the way clouds form

cloud formation – the way clouds form

thermal – a rising air current caused by heating the Earth’s

surface (radiation)

thermal – heated air that risesthermals help these birds to soar,they help gliders soar, too. They

push air into the atmosphere, that cools and forms clouds

convection – when relatively warm air is raised into the

atmosphere, often cooling and forming clouds

meteorologist – a scientist who deals with the atmosphere,

including weather and climate