Atmosphere
The earth’s atmosphere consists of 78% and 21% .
Nitrogen, Oxygen
_________ loose their power sourch when they reach land. They are responsible for huge storm sergest and most originate in areas of the ocean where the air is stagnant.
Hurricanes
(90% found in the Pacific Ocean)
Helful info for test :)
Instrument used to measure the direction of the wind.
Wind vane (or wind sock)
When warm air expands it becomes ____ dense.
Less
Circular motion of air due to the earth's rotation.
Corriolis effect
The gases in the atmosphere are held in place by the earth’s _________.
This is responsible for air pressure which is ____ pounds per square inch at sea level.
Gravity, 14.7
What kind of cloud are thunderstorms?
Do thunderstorms always produce precipitation?
Cumulonimbus, not always
Instrument used to measure relative humidity using wet and dry bulb thermometers
Psychrometer (a specific type of hygrometer)
Two conditions that are uniform in an air mass.
Temperature & Humidity
The amount of water in the air compared to the amount it could hold.
Relative Humidity
Weather occurs in this layer of the atmosphere
Troposphere
Is there a differnece between tropical depression and hurricane?
They are different. a tropical depression forms when a low pressure area is accompanied by thunderstorms that produce a circular wind flow which can then develop into a hurricane.
Tropical depression winds below 39mph
Tropical storm if winds reach 63 km/hr (39 mph)
Hurricane if its winds reach 119 km/hr (74 mph).
Portable weather station taken into the atmosphere by a weather balloon.
Radiosonde
What happens to the atmospheric pressure as you go up in altitude?
It decreases
What describes the feeling of temperature difference based on wind speeds?
Wind chill
Five major conditions of the atmosphere are studied by meteorologists.
Wind, Precipitation, Pressure, Humidity, Temperature
A tornado that forms over water.
Waterspout
Instrument used to measure wind speed
Anemometer
An area where 2 air masses meet and weather changes most drastically.
ex. can you name 4 different ones?
Stationary, warm, cold, occluded
A bubble of warm moist air.
Convection cell
What are the layers of the atmosphere in order?
Troposhpere, Stratosphere, Mesosphere, Thermosphere, Exosphere
What causes thunder?
Compression wave as air expands from heat generated from lightnihng
Instrument used to measure the air pressure.
Barometer
High pressure occurs with a cooler, drier air mass that produce
Cool, clear weather
(Low pressure creates more warm, humid weather.)
Takes into account many weather conditions to make an apparent temperature.
Heat index