World Wide Weather By Tessa Cisco and Paige Haas
Atmosphere The condition of the atmosphere at a particular time and place is called weather. The atmosphere is made up of 78% nitrogen, 21% oxygen, and the other 1% is all other gasses.
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Layers of the Atmosphere There are four layers of the atmosphere. The layer that is closest to the Earth's surface is the troposphere. The second layer on top of the troposphere is the stratosphere. The third layer on top of the stratosphere is the mesosphere. The top layer on top of the mesosphere is the thermosphere, it is the highest layer. ttp://www.kudzuacres. com/wwow/lessons/climate/atmospheric.html
Convection Convection is the transfer of heat through liquid. In liquids and gasses molecules move from place to place. As molecules move they take their heat with them.
Currents There are different types of wind currents. Polar easterlies, westerlies, and trade winds. Polar easterlies blow east and westerlies blow west. Trade winds blow above the equator. Deep ocean currents are a current deep in the ocean that moves throughout Earth.
Air Pressure The force pushing on an area is known as pressure. High Pressure High air pressure is when the density of the air is higher. The weather is usually sunny and clear skies.
Low Pressure Low pressure is when the density of the air is lower. The weather is usually cloudy skies and rainy.
Fronts Fronts are huge masses of air that move across land and oceans. These masses of air bump into each other. They don't easily mix. Sometimes two air masses that are different temperatures run into each other. When this happens the area where they meet and don't mix becomes a front. The four types of fronts are cold fronts, warm fronts, stationary fronts, and occluded fronts.
Four Types of Fronts The four types of fronts are cold fronts, warm fronts, stationary fronts, and occluded fronts. A warm front occurs when a warm air mass takes the place of a cold air mass. When warm fronts pass through an area the air becomes warmer and more humid. Cold fronts occur when when a cold air mass replaces a warm air mass. When a cold front passes through an area the air becomes colder and drier.
Four Types of Fronts A stationary front happens when a warm or cold front stops moving. When it starts moving again it becomes a warm or cool front again. An occluded front is called this because a warm air mass is cut off or occluded from the ground.
Occluded Front
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Hurricanes A hurricane is a tropical storm that reaches 74 or more miles per hour. Hurricanes form in warm water and they grow when air rises and forms clouds, the clouds are sucked into the hurricane. The eye of the hurricane is the center. When the Eye passes over an area the weather becomes calm. Hurricanes usually last a week or more.
Tornadoes A tornado is a spinning funnel shaped cloud that reaches down from a storm cloud to touch the Earth's surface. Tornadoes form in low heavy clouds. If a tornado is in your area the safest place to be is in a basement of a well built building.
Sun & Suns energy The suns energy travels to the earth as electromagnetic waves. The sun's energy reaches the earth in the form of visible light, infrared radiation, and ultraviolet radiation. Ultraviolet radiation: is a form of energy shorter than light. Infrared radiation: is a form of energy with a wavelengths longer than red light â—?
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Weather map
Isotherm and isobar â—? Isotherm lines are lines of constant and equal temperature on maps â—? Isobar lines are lines of constant or equal pressure
Precipitation Precipitation is part of the water cycle after condensation. There are four types of precipitation rain, snow, sleet, and hail.
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Clouds There are three types of clouds stratus, cumulus, and cirrus. Cumulus clouds are puffy white clouds that look like cotton balls Stratus clouds are usually fog and they are close to the ground Cirrus clouds are bright white with wispy edges ●
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Dew point Dew point is when the air can't hold all the water vapor in the air and some of the water vapor condenses into liquid water
Scientists Images and Instruments â—? Scientists get images from satellites. These images help them determine weather patterns. â—? Scientists use several instruments such as barometers, thermometers, rain gauges, wind vanes, and anemometers. Barometer- Air pressure Thermometer- Temperature Rain gauge- Amount of rain Wind vane- Wind direction Anemometer- Wind speed
Work T-Chart Tessa
Paige
-Atmosphere Convection -Wind Currents -Ocean Currents -High Pressure -Low Pressure -Fronts -Hurricanes -Tornadoes
-Sun and Sun's Energy -Weather Map -Isotherm and Isobar -Types of precipitation -Types of Clouds -Dew Point -How scientists get images -Meteorological instruments