WEATHER by Brooke

What is a Low Pressure System?

crafter101 — 2015-05-20 22:10:10 UTC

A low pressure system is a whirling mass of warm, moist air that generally brings stormy weather with strong winds. When viewed from above, winds spiral into a low-pressure center in a counterclockwise rotation in the Northern Hemisphere. A low pressure system is represented as a big, red L.

What Is A High Pressure System?

crafter101 — 2015-05-20 22:11:20 UTC

A high pressure system is a whirling mass of cool, dry air that generally brings fair weather and light winds. When viewed from above, winds spiral out of a high-pressure center in a clockwise rotation in the Northern Hemisphere . These bring sunny skies. A high pressure system is represented as a big, blue H.

What is a dew point?

crafter101 — 2015-05-20 22:13:02 UTC

The dew point is the temperature at which water starts to condense out of a particular air mass. The dew point temperature changes only when the moisture content of the air changes. The higher the dew point, the greater the moisture content is in the air.

What is humidity?

crafter101 — 2015-05-20 22:14:08 UTC

Humidity is the amount of water vapor in the air.

What is a front?

crafter101 — 2015-05-20 22:15:01 UTC

A front is a boundary between two different air masses, resulting in stormy weather. A front usually is a line of separation between warm and cold air masses.

What is a cold front?

crafter101 — 2015-05-20 22:15:43 UTC

A cold front is a boundary between two air masses, one cold and the other warm, moving so that the colder air replaces the warmer air. A cold front is represented as a blue line with the teeth pointing toward the direction on movement.

What is a warm front?

crafter101 — 2015-05-20 22:16:15 UTC

A warm front is a boundary between two air masses, one cool and the other warm, moving so that the warmer air replaces the cooler air. A warm front is represented as a red line with half circles pointing toward the direction on movement.

What is a stationary front?

crafter101 — 2015-05-20 22:17:03 UTC

A stationary front is a boundary between two air masses that more or less doesn’t move, but some stationary fronts can wobble back and forth for several hundred miles a day. A stationary front is represented as an alternating warm and cold front symbol.

What is a occluded front?

crafter101 — 2015-05-20 22:17:33 UTC

An occluded front is a combination of two fronts that form when a cold front catches up and overtakes a warm front. An occluded front is represented as a purple line with teeth and half circles.

WEATHER

crafter101 — 2015-05-20 22:18:22 UTC

conductoin

crafter101 — 2015-05-20 23:38:21 UTC

heat transfer within a material or between materials that are touching

convection

crafter101 — 2015-05-20 23:39:23 UTC

the movement of molecules within fluids. it cannot take place in solids. the warmer part of the mass will rise and the cooler portions will sink.

vocabulary

crafter101 — 2015-05-20 23:42:50 UTC

density

crafter101 — 2015-05-20 23:43:14 UTC

how tightly packed the matter in a substance is.

high pressure

crafter101 — 2015-05-20 23:43:51 UTC

a mass of sinking cool air that usally brings fair weather

hygrometer

crafter101 — 2015-05-20 23:44:57 UTC

an instrument that measures humidity in the atmosshpere

air pressure

crafter101 — 2015-05-20 23:47:46 UTC

the measure of the force with whitch air molecules push on a surface

anemometer

crafter101 — 2015-05-20 23:48:54 UTC

mearsures wind speed

barometer

crafter101 — 2015-05-20 23:49:23 UTC

an instrument for measuring atmosherperic pressure; an indicator that change in weather is coming

climate

crafter101 — 2015-05-20 23:52:03 UTC

overall weather in an area over a long period of time

cold front

crafter101 — 2015-05-20 23:52:34 UTC

forms when cold air moves under warm air (which is less dense) and pushes air up sometimes producing thunderstorms, heavy rain, or even snow

jet stream

crafter101 — 2015-05-20 23:54:03 UTC

a high speed high altitude air stream blowing from west to east near the top of troposphere ;air masses are spread out and it creates areas of low pressure

low pressure

crafter101 — 2015-05-20 23:56:27 UTC

a mass of rising warm air that usually bring wet, stormy weather

prevailing westerlies

crafter101 — 2015-05-20 23:57:25 UTC

major wind belt that moves over the united states . this wind belt pushes air masses and our weather from west to east

radiation

crafter101 — 2015-05-20 23:59:10 UTC

heat transferred in waves/ rays from one object to another

warm front

crafter101 — 2015-05-21 00:00:11 UTC

a front where warm air moves over cold air and brings drizzly rain and then are followed by warm and clear weather