Advertisement Upgrade to remove ads

stratus cloud

a cloud that forms in a blanketlike layer

sea breeze

wind that blows from sea to land


when water flows down surfaces back into lakes, rivers, oceans, streams, or ground


the slow changing of a liquid into a gas

warm front

A front where warm air moves in over a cold front


Any form of water particles that falls from the atmosphere and reaches the ground

cumulus cloud

A puffy cloud that appears to rise up from a flat bottom


Air that moves horizontally

relative humidity

A comparison between how much water vapor is in the air and how much the air could hold at a given temperature if it were full, or saturated


Earth's water, whether found in continents and oceans, including the fresh water in ice, lakes, rivers, and underground water


The average weather pattern of a region

weather (wind) vane

A device that indicates wind direction


A device for measuring air pressure

water table

The top of the water-filled spaces in the ground


An underground layer of rock or soil filled with water


The layer of the atmosphere closest to Earth's surface


The amount of the Sun's energy that reaches Earth at a given time and place

cold front

A front where cold air moves in under a warm front


A boundary between air masses with different temperatures


A violent whirling wind that moves across the ground in a narrow path

stationary front

An unmoving front where a cold air mass and a warm air mass meet

air pressure

The force put on a given area by the weight of the air above it


A cloud that forms at ground level

land breeze

Wind that blows from land to sea


An ocean movement; a large stream of water that flows in the ocean

air mass

A large region of the atmosphere where the air has similar properties throughout


A hole dug below the water table that water seeps into


The amount of water vapor in the air


The changing of a gas into a liquid


A very large, swirling storm with very low pressure at the center


The blanket of gases that surrounds Earth


A storage area for fresh water supplies

occluded front

A front formed where a warm front and cold front meet


The most common severe storm, formed in cumulonimbus clouds

water cycle

The continuous movement of water between Earth's surface and the air, changing from liquid to gas to liquid


A device that measures wind speed


What the lower atmosphere is like at any given place and time


Getting freshwater from seawater

cirrus cloud

A high-altitude cloud with a featherlike shape, made of ice crystals


A place where groundwater seeps out of the ground

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording