Weather study guideWeather study guide

answeranswer

Humidity Humidity

Humidity is the amount of Humidity is the amount of water vapor in air.water vapor in air.

The air cannot hold much The air cannot hold much more water when humidity is more water when humidity is high so your sweat will not high so your sweat will not evaporate to cool you off.evaporate to cool you off.

HumidityHumidity

How is temperature related to the How is temperature related to the amount of water vapor air can amount of water vapor air can hold? hold?

The warmer the temperature, the The warmer the temperature, the more water vapor it can hold.more water vapor it can hold.

HumidityHumidity

What is relative humidity? What is relative humidity? Relative humidity measures Relative humidity measures

how much water vapor air is how much water vapor air is holding compared to how much holding compared to how much it could hold at a certain it could hold at a certain temperature; it is written as a temperature; it is written as a percent.percent.

PrecipitationPrecipitation

How does precipitation form? How does precipitation form? Precipitation forms when Precipitation forms when

evaporated water vapor condenses evaporated water vapor condenses in clouds on particles such as dust in clouds on particles such as dust

11) sun) sun 2) clouds2) clouds 3) evaporation3) evaporation 4) precipitation4) precipitation 5) bodies of water5) bodies of water 6) condensation6) condensation

Identify the types of precipitation Identify the types of precipitation

a. raina. rain b. freezing rainb. freezing rain c. sleetc. sleet d. snowd. snow e. haile. hail

types of molecules types of molecules

water vapor and solid water vapor and solid particles (dust)particles (dust)

High and Low Pressure SystemsHigh and Low Pressure Systems

High and Low Pressure Systems High and Low Pressure Systems

Warm air is less Warm air is less densedense than colder than colder air and air and risesrises in the atmosphere. in the atmosphere.

Rising moist air causes areas of Rising moist air causes areas of lowlow pressure, creates clouds, and pressure, creates clouds, and is associated with is associated with stormystormy weather weather..

High and Low Pressure SystemsHigh and Low Pressure Systems

Cool air is more Cool air is more densedense than than warmer air and warmer air and sinkssinks in the in the atmosphere.atmosphere.

Sinking dry air causes areas of Sinking dry air causes areas of highhigh pressure, evaporates clouds, pressure, evaporates clouds, and is associated with and is associated with fairfair weather weather

Wind formsWind forms

Air molecules move from Air molecules move from areas of high pressure to low areas of high pressure to low pressure; these moving pressure; these moving molecules create wind.molecules create wind.

Thunderstorms Thunderstorms

Thunderstorms form Thunderstorms form when warm, moist air when warm, moist air rises quickly and then rises quickly and then cold air sinks quickly.cold air sinks quickly.

ThunderstormsThunderstorms

Three dangers of thunderstorms Three dangers of thunderstorms include: heavy rains (flash floods), include: heavy rains (flash floods), lightning, strong winds, tornadoes, lightning, strong winds, tornadoes, and hail.and hail.

ThunderstormsThunderstorms

Lightning is produced in a cloud Lightning is produced in a cloud when different parts of the cloud when different parts of the cloud become oppositely charged. When become oppositely charged. When current flows between regions of current flows between regions of opposite electrical charge, opposite electrical charge, lightening flasheslightening flashes

ThunderstormsThunderstorms

Thunder is caused by the Thunder is caused by the rapid heating of air around a rapid heating of air around a bolt of lighteningbolt of lightening

TornadoesTornadoes

Tornadoes form when the up Tornadoes form when the up and down movement of air in a and down movement of air in a thunderstorm begins to move in thunderstorm begins to move in a circular motion.a circular motion.

TornadoesTornadoes

Weather that is associated with Weather that is associated with tornadoes includes hail and tornadoes includes hail and lightning. lightning.

TornadoesTornadoes

TornadoesTornadoes

The Fujita Scale is used to rate The Fujita Scale is used to rate tornadoes based on the wind tornadoes based on the wind speed. (F-0 through F-6)speed. (F-0 through F-6)

TornadoesTornadoes

Warm moist air from the Gulf of Mexico Warm moist air from the Gulf of Mexico collides with cool air from Canada and dry collides with cool air from Canada and dry air from the Rockies. This collisions of air air from the Rockies. This collisions of air mass is often triggers thunderstorms, often mass is often triggers thunderstorms, often very strong ones. very strong ones.

Tornadoes form during thunderstorms, when Tornadoes form during thunderstorms, when unstable hot air near the ground rises and unstable hot air near the ground rises and meets the cooler air above in the thunder meets the cooler air above in the thunder clouds. clouds.

HurricaneHurricane

Low pressure system over the ocean near the equator

Hurricanes form when warm, Hurricanes form when warm, moist air rises quickly over moist air rises quickly over warm water.warm water.

HurricaneHurricane

HurricaneHurricane

Typhoon in the Pacific ocean Typhoon in the Pacific ocean

Tropical cyclone in the Indian Tropical cyclone in the Indian oceanocean

HurricaneHurricane

Three dangers of hurricanes Three dangers of hurricanes include: strong winds, heavy include: strong winds, heavy rains (flooding), storm surge, rains (flooding), storm surge, and tornadoes.and tornadoes.

BlizzardBlizzard

A severe snowstorm characterized by strong winds and low temperatures

BlizzardBlizzard

During a blizzard you should During a blizzard you should stay indoors, dress warm and stay indoors, dress warm and be preparedbe prepared

Low pressure often brings stormy Low pressure often brings stormy weather, and high pressure often brings weather, and high pressure often brings fair weather. Which of the locations is fair weather. Which of the locations is most likely to have clear skies? most likely to have clear skies?

a. Qa. Qb. Rb. Rc. Sc. Sd. Ud. U

QQ

What kind of front does the What kind of front does the line with the half circles line with the half circles represent? represent?

warm frontwarm front

mmmm

In what direction is the cold front In what direction is the cold front moving? moving?

easteast

What type of weather should city What type of weather should city “U” be expecting? “U” be expecting?

warmer temperatureswarmer temperatures