Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
Wearther |
the condition of the atmosphere at a particular time and place |
|
|
water cycle |
the continuous movement of water from water sources |
|
|
humidity |
amount of water vapor or moisture the air |
|
|
relative humidity |
amount of moisture the air contains compared with the maximum amount it can hold at a particular temperature |
|
|
condensation |
the process but which a gas becomes a liquid |
|
|
dew point |
the temperature to which air must cool to be completely saturated |
|
|
cloud |
a collection of millions of tiny water droplets or ice crystals |
|
|
precipitation |
water, in a solid or liquid form, that falls from the air to the earth |
|
|
air mass |
a large body of air that has similar temperture and moisture throughout |
|
|
front |
when two different air masses meet, a boundary forms between them |
|
|
thnderstorms |
small, intense weather systems that produce strong winds, heavy rain, lightning, and thunder |
|
|
lightning |
a large electrical discharge that occurs between two oppositely charged surfaces |
|
|
thunder |
the sound that results from the rapid expansion of air along the lightning strike |
|
|
tornado |
small rotating coloum of air that has high speed and low central pressure and that touches the ground |
|
|
hurricane |
large, rotating tropical weather system with wind speed of at least 119 km/h |
|
|
thermometer |
a tool used to measure air temperature |
|
|
barometer |
an instrument used to measure air pressure |
|
|
windstock |
cone-shaped cloth bag open at both ends, measures wind direction
|
|
|
wind vane |
shaped like an arrow with a large tail and is attached to a pole, measures wind direction |
|
|
anemometer |
consists of three or four cups connected by strokes to a pole, measures wind speeds |
|
|
isobars |
lines that connect points of epual air pressure rather than equal elevation |
