Weather Test

Low air pressure

warm, moist air

cloudy weather with precipitation

High air pressure

cool, dry air

clear, fair weather with light winds

difference in air pressure density

low pressure-less dense(rises)

high pressure-more dense(sinks)

how air pressure relates to humidity

They are opposites. As humidity increases, air pressure decreases. (vice versa)

how air pressure can cause winds

air moves from high pressure areas to low pressure areas, creating horizontal currents known as wind. wind is caused by the differences in air pressure

radiant definition

energy that is transferred by electromagnetic radiation

ex: the sun which emits radiant energy in the form of light and other electromagnetic waves

convection

the transfer of heat by movement of a fluid

conduction

the direct transfer of heat from one substance to another that is is touching

condensation

the process by which molecules of water vapor in the air cool down and become liquid water

evaporation

the process by which water molecules in liquid water escape into the air as water vapor

how does humidity affect weather

def: the amount of water vapor in the air

affects cloud formation, precipitation, and the way air feels (more water vapor, more precipitation)

how does dew point affect weather

def: the temperature at which condensation occurs

affects how muggy or humid the air will feel, formation of clouds, higher heat index, and development of thunderstorms and tornadoes

how does air pressure affect weather

affects the winds, precipitation.

High air pressure: clear, fair day

Low air pressure: cloudy and rainy

how do ocean currents affect weather

ocean currents regulate climate

Influence temperature, precipitation, and even distribution of sea and ice. Warm currents cause increased evaporation which lends to storm formation.

how do weather fronts affect weather conditions

warm fronts: bring prolonged periods of light precipitation, fog, and higher temperatures

cold fronts: bring thunderstorms, drop in temperatures, and change in wind direction

stationary fronts: prolonged period of precipitation(flooding), and more moisture

occluded fronts: strong winds and heavy precipitation

how do air masses affect weather

warm, humid air masses can bring hot, sticky conditions. cold, dry air masses can bring, clear, cold weather. The movement of air masses can lead to changes in wind direction and speed

what causes weather

energy from the sun, uneven heating of the earths surface, and seasons causing different weather patterns

occluded front

a type of weather front that forms when a cold front overtakes a warm front during the development of a cyclone

how does temperature affect weather conditions