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September 21, 2015 Day 3 What Is the difference between weather and climate? September 21, 2015 What is Climate? Yesterday we started off with an inquiry into air pressure but before we continue we need to take a step back and analyze climate and weather. Climate: is the average weather pattern of a region over a period of time. Climate can be described by many factors such as... *Temperature-precipitation graph *Winds *Air Pressure *Landforms *Ocean Currents Many people get climate and weather mixed up but the main difference is Climate is measured over TIME. Click Here to Learn More September 21, 2015 What is Weather? Well if climate is the average weather of a region over time, then what is weather? If you have ever said "It's hot outside" or "It's so cloudy." What you talking about or describing is weather. Weather: is what it is like outside at any given place and time. Characteristics of weather are... *Temperature (How Hot or Cold a place is) #Measured using a thermometer *Humidity *Air Pressure *Cloud cover *Wind *Precipitation (Rain,Sleet,Snow,Hail) Click Here to Learn More Weather is observable, which means you can see it. Weather is constantly changing. September 21, 2015 So what is the difference between Weather & Climate? All you need to Remember is climate is the average weather of a region over TIME. As Weather is what it is like outside at any moment. So even though some of the characteristics might be the same. Climate is over TIME and Weather is RIGHT NOW! Click Here to Learn More September 21, 2015 Day 4 What Is Air Pressure? September 21, 2015 Review: What is Climate & Weather? Yesterday we talked about the difference between Climate and weather. So what is Climate? Climate: is the average weather pattern of a region over a period of time. What is Weather? Weather: is what it is like outside at any given place and time. What is the difference between Climate and Weather? Climate is the average weather of a region over TIME. As Weather is what it is like outside at any moment. September 21, 2015 What is Air Pressure? Yesterday we talked about climate and weather, today our focus will be on Air Pressure. Air Pressure: The force put on a given area by the weight of the air above it. While temperature is measured by a thermometer Air Pressure is measured using a barometer. Barometer: Instrument used to measure Air Pressure. Air Pressure can be described in two ways... *High Pressure *Low Pressure September 21, 2015 How Can Air Pressure Change? Just like there are factors that determine weather and climate there are also factors that can affect air pressure. Those include... *Volume: $As Volume decreases Air Pressure Increases and as Volume Increases Air Pressure Decreases. *Height Above Earth's Surface: $Air Pressure is greatest at Sea Level because the air molecules are packed tightly together. So as you go up in the atmosphere Air Pressure Decreases. *Temperature: $When it's HOT air pressure Decreases. (Hot=Decrease) $When it's COLD air pressure Increases. (Cold=Increase) *Amount of Water Vapor (Also known as HUMIDITY) September 21, 2015 Are There Types of Air Pressure? Yes, there are actually two types of Air Pressure that you commonly hear which are..... *High Pressure *Low Pressure September 21, 2015 LOW PRESSURE INFO... *Low Pressure brings WARM and RAINY skies. As air warms it expands causing the air molecules to spread out causing air pressure to decrease. So if the weather is warm, cloudy, and rainy there is a Low Pressure system in the area. September 21, 2015 Oh Yeah I Almost Forgot.... AIR PRESSURE MOVES FROM HIGH TO LOW!.... One more time AIR PRESSURE MOVES FROM HIGH TO LOW! AIR PRESSURE goes from.... HIGH LOW September 21, 2015 But Don't Take My Word For It... Click Here to Learn More September 21, 2015 Day 5 What Is Wind? September 21, 2015 Review: What is Air Pressure? Yesterday we talked about Air Pressure. So what is Air Pressure? Air Pressure: The force put on a given area by the weight of the air above it. What type of weather comes with High Pressure? COOL, FAIR WINDS and CLEAR skies What type of weather comes with Low Pressure? Low Pressure brings WARM and RAINY skies Which way does air pressure travel? AIR PRESSURE MOVES FROM HIGH TO LOW!.... September 21, 2015 What is Wind? Yesterday we talked about air pressure, today our focus will be on Wind. Wind: Air that moves horizontally. While air pressure is measured by a barometer Wind is charted using a wind vane. Wind Vane: Instrument used to chart wind direction. September 21, 2015 WIND! *Wind is CREATED by DIFFERENCES in AIR PRESSURE or air rising (Low Pressure) and falling (High Pressure). Air that rises is know as an updraft. Air that is sinking is know as a downdraft. Updraft: Air that is rising Dowdraft: Air that is sinking *This process of unequal heating and cooling of air ofter makes a pattern of rising air, sinking air, and winds is called a convection cell. Convection cell: A pattern of rising air, sinking air, and winds. Click Here to Learn More September 21, 2015 WIND WIND IS CREATED BY DIFFERENCES IN AIR PRESSURE!.... One more time WIND IS CREATED BY DIFFERENCES IN AIR PRESSURE! THE GREATER THE DIFFERENCE THE FASTER/ HARDER THE WIND BLOWS! GREATER DIFFERENCE FASTER THE WIND! Click Here to Learn More September 21, 2015 What is a Land Breeze & a Sea Breeze? A prime example of a convection cell would be a Land Breeze and a Sea Breeze. During the day the sun heats the land, causing the air to rise. As the air rises the cool air over the ocean moves in to take it's place. This is called a Sea Breeze. A Land Breeze occurs when the air over land cools and sinks pushing the warm air over the ocean upwards. Land Breeze: a breeze that blows from land to sea. LAND Sea Breeze: a breeze that blows from sea to land. SEA SEA LAND September 21, 2015 Do you know Wind Zone the U.S.A is in? There are Global WIND Zones that cover the entire globe but the U.S.A. is only affected by one. The UNITED STATES is in zone known as the PREVAILING WESTERLIES. September 21, 2015