Weather Flashcards
(26 cards)
The amount of water vapor in the air.
Humidity
Puffy, white clouds that tend to have flat bottoms. They also form when air rises and usually indicate fair weather.
Cumulus Cloud
Clouds that form in layers. They cover large areas of the sky and often block out the sun.
Stratus Cloud
Thin, feathery, white clouds found at high altitudes. They form when the wind is strong.
Cirrus Cloud
Clouds that are more likely to form thunderstorms and are more likely to produce precipitation.
Cumulonimbus Cloud
The process by which gas, such as water vapor, becomes a liquid.
Condensation
The process of turning from liquid into vapor.
Evaporation
Water, in a solid, or liquid form, that falls from the air to Earth.
Precipitation
the draining away of water from the surface of an area of land, a building or structure.
Runoff
When water drops in the cloud become large enough to fall.
Rain
Forms when rain falls through a layer of freezing air. The rain freezes in air, producing it.
Sleet
Forms when temperatures are so cold that water vapors change directly into a solid.
Snow
Balls or lumps of ice that fall from clouds. They form in mostly cumulonimbus clouds.
Hail
Forms over North Pacific ocean and is cold and wet.
Polar-Maritime Air-mass
Forms over the Pacific is warm.
Tropical- Maritime Air-mass
very cold and dry air mass.
Polar- Continental Air-mass
In summer time it is dry and warm.
Tropical- Continental Air-mass
Forms where cold air moves under warm air, which is less dense, and pushes warm air up.
Cold Front
Forms when warm air moves over cold, denser air. Warm air gradually replaces the cold air.
Warm Front
Small, intense weather systems that produce strong winds, heavy rains, lightning, and thunder. They can occur along cold fronts.
Thunderstorm
An electric discharge that occurs between a positively charged area and a negatively charged area. It can happen between two clouds, between the Earth and a cloud, or even two parts of the same cloud
Lightning
The sound that results from the rapid expansion of air along the lightning strike.
Thunder
A small, spinning column of air that has a high wind speeds and low central pressure that touches the ground.
Tornado
A large, rotating tropical weather system that has wind speeds of at least 120 km/h.
Hurricane
