| A | B |
|---|
| air mass | a body of air that has about the same temperature and moisture |
| air pressure | the force exerted by air in all direction on any given object |
| atmosphere | a mixture of gases that surround the planet |
| blizzard | a snowstorm with strong winds and low temperatures |
| front | the boundary between two air masses |
| hurricane | a tropical storm with sustained speeds near its center of at least 74mph |
| jet stream | a narrow belt of high-speed winds in the upper troposphere |
| land breeze | a local wind that blows at night from land toward water |
| meteorologist | a scientist who studies weather |
| mountain breeze | a local wind that blows downhill and is produced by cooler, denser air above the moutain slopes |
| planetary winds | long-lasting wind patterns that cover a large area of Earth |
| sea breeze | a local wind that blows from water toward land during the day |
| thunderstorm | a storm that delivers lightning, thunder and heavy rains |
| tornado | a narrow, spinning column of very fast-moving air |
| valley breeze | a local wind produced by the movement of cooler air from the valley that moves up a mountain slope |
| weather | what the atmosphere is like at a given time and place |
