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;
44 Cards in this Set
- Front
- Back
the condition of the atmosphere at a certain time or place |
Weather |
|
is the continuous movement of water from sources on Earth’s surface into the air and back. |
water cycle |
|
evaporation |
when liquid water changes into water vapor, which is a gas. |
|
condensation |
when water vapor cools and changes from a gas to a liquid; forms clouds. |
|
precipitation |
occurs when this liquid falls from the clouds back to the Earth |
|
runoff |
water that flows across the land from rivers and streams and eventually reaches the ocean. |
|
humidity |
the amount of water vapor in the air. |
|
relative humidity |
amount of water vapor in the air compared to what it could be at that temperature. |
|
psychrometer |
humidity is measured by |
|
dew point |
When the temperature drops below what saturated air can hold, the water vapor condenses |
|
cirro |
clouds at high altitudes |
|
alto |
clouds at middle altitudes |
|
when rain falls through a layer of freezing air it is called |
sleet |
|
when temperatures are so cold that water vapor turns directly to a solid. |
snow |
|
form when strong updrafts cause water to freeze in layers around a small nucleus of ice. |
Hail |
|
large body of air that has the same temperature and moisture content throughout. |
Air mass |
|
mP, cP, mT, cT |
(maritime polar), (continental polar), (maritime tropic), (continental tropic) |
|
boundary where two air masses meet |
fronts |
|
cold air mass invades a warm air mass; produces thunderstorms and cooler weather. |
cold front |
|
warm air moves over cold air; bring drizzly rain followed by warm clear weather. |
warm front |
|
two cold fronts collide; strong winds and heavy precipitation; severe weather |
occluded front |
|
front stops moving; same weather for several days |
stationary front |
|
cyclones |
areas that have lower pressure than surrounding areas; winds move towards the middle; stormy weather. |
|
anticyclones |
areas that have high pressure; dry,clear weather |
|
small, intense weather system that produces strong winds, heavy rain, lightning and thunder. |
thunderstorm |
|
Lightning can reach |
30,000 oC |
|
thunder |
results from the rapid expansion of air around a lightning strike. |
|
Tornadoes |
small, spinning column of air with high wind speeds and low central pressure that touches the ground. |
|
Average tornado has wind speed of km/h, but can reach as high as km/h. Cause buildings to Categorized by the |
120 to 180 500 explode Fujita scale |
|
Hurricanes |
a large, rotating tropical weather system with speeds of at least 120 km/h. |
|
called in the Pacific Ocean and in the Indian Ocean. |
typhoons cyclones |
|
wall of water is pushed up ahead of the hurricane; most dangerous part of the storm. |
storm surge |
|
a prediction of weather conditions for the next 3 to 5 days. |
weather forecasting |
|
Conditions meteorologists measure 6 things |
- Air pressure - Humidity- precipitation-Temperature - wind speed - Wind direction |
|
weather balloons |
measure weather conditions as high as 30 km above Earth’s surface. |
|
tool used to measure air temperature. |
thermometer |
|
instrument to measure air pressure. |
Barometer |
|
anemometer |
instrument used to measure wind speed. |
|
Wind direction can be determined by using a |
wind sock or wind vane. |
|
used to find location, movement, and amount of precipitation. |
Radar |
|
Doppler radar uses to show amounts and locations of precipitation. |
color codes |
|
Station models |
small circle on a map that shows the location of a weather station. |
|
lines that connect points of equal air pressure. |
isobars |
|
lines that connect areas of equal temperature. |
isotherms |