Air Pressure
what tool is used to measure air pressure?
Barometer
Weather is the state of the atmosphere at a specific time and place regarding:
Air pressure, Wind, Temperature, Humidity
Thunderstorms occur when?
when warm air rises quickly
what does warm air do?
expands, becomes less dense, and rises
how are hurricanes formed?
over warm water when wind blows into low pressure areas (that contain warm and moist air) in the northern hemisphere.
Does air pressure increase or decrease when you go higher up?
decrease
Humidity is the amount of ____ in the air
moisture/water vapor
what is lightning?
bolts of electricity formed when Warm air quickly rises, causing clouds to be electrically charged
what does cool air do?
condenses and sinks
true or false
A category 5 tornado contains the most powerful winds and caused the most damage
True
when air pressure is high what weather do we usually get?
sunny/clear/calm weather
Relative Humidity is the amount of moisture in the air compared to:
how much water vapor the air can hold
what is thunder?
the sound of the warm air expanding due to the heat of the lightning, and then quickly contracting when it cools
what is wind caused by?
movement of air from areas of high pressure(cold air) to low pressure (warm air)
true or false
Tornadoes stay in a large area and last for a long amount of time, lasting at least an hour
False
if altitude increases, density ____
decreases
what is dew point?
the temperature when dew forms on surfaces
what is the eye of the storm?
the center of the storm and also the calmest part of the storm
Because the earth is curved what does the sun do to it?
there is uneven heating of the Earth’s surface
what are tornadoes and how are they formed?
swirling vortex of wind formed when an updraft (fast moving air rising into clouds) creates a funnel cloud which reaches the ground
when you get further away from earth's surface will there be more or less gas molecules
Less
The surface that the clouds are formed on are ____ particles (the aerosols) in the atmosphere
dust/salt
what is the Saffir-Simpson Hurricane Wind Scale used for?
to measure hurricanes based on wind speed
why is the equator warmer?
because the sun travels a shorter distance and hits the equator directly
The Saffir-Simpson Hurricane Wind Scale predicts the strength of the storm using a measurement of Categories _ - _
what level is the most catastrophic?
1-5
5 is the most catastrophic