Presentation on theme: "Weather TEKS Essential Questions"— Presentation transcript:
1Weather TEKS Essential Questions 8.10 B Identify how global patterns of atmospheric movement influence local weather using weather maps that show high and low pressures and fronts.8.10 C Identify the role of the oceans in the formation of weather systems such as hurricanes.Essential QuestionsHow do global patterns of atmospheric movement influence local weather?How are weather maps used to identify global patterns of atmospheric movement?What is the role of oceans in the formation of weather systems?
2Warm-Up Are weather and climate the same thing? BEFOREAFTERWEATHERCLIMATEWhat do you know about weather and climate? Fill out the before section of this comparison chart.How is weather different from climate or are they the same thing?
3If you said that weather and climate were different things, you’re right! The happenings in the atmosphere at a certain time.The meteorological conditions, including temperature, precipitation, and wind, that characteristically prevail in a particular region.A region of the earth having particular meteorological conditions: lives in a cold climate.ClimateWeather
4So, in other words:Climate is how the weather usually is in a particular area. For example, Austin is usually very hot in the summer, and we have mild winters.Weather is what it is like outside right now. For example, a cold front came in this morning, and now I want to stay inside.But what causes our weather to change?
5Our weather depends a lot on the wind. Wind is simply the movement of air, but what causes it and how does have such an impact on our weather?
6Explore Activity 1: The Movement of Air Masses Everyone stand very close together. Imagine all of the students in every class in the school were tightly packed into their classroom with standing room only.All doors and windows were closed.This room then would be a high pressure area.Now imagine that there is no one in the hall outside the classroom. It is totally empty. The hall then is a low pressure area.Someone opens the door…Where would you want to go?Discuss different senerios (e.g. what if there were people in the hall, how would that change your movement?)
7Reflection…In your journal, revise your warm-up. Are climate and weather the same thing?Next write a paragraph about the information you gained today and your experiences in a high pressure system. Be specific. What did you learn? What new questions do you have about the weather?
8Exit Ticket Your teacher has given you a post-it. Look back in your notebook to today’s lesson.Write either something you learned or a question you have on the post-it.Stick your post-it to the chart your teacher has prepared for your class.
9Warm-Up 2Think back on what you learned in our last class, in your interactive notebook answer the following question:How do you think the movement of air in our atmosphere affects what the weather is like here and around the world? Explain your answer.If you think that air moving does not affect weather around the world, explain why.
10We know that weather is… The happenings in the atmosphere at a certain time.
13What does that mean?It means, that wind is produced by the uneven heating of the earth’s surface by the sun (remember, the Earth is tilted, so we don’t all get the same amount of sun)Since the earth’s surface is made of both land and water formations, it absorbs the sun’s radiation unevenly.This means it does not all heat the same way.
14When you were in a high pressure situation… You wanted to move…So does the air. Warm air, which weighs less than cold air, rises. Then cool air moves in and replaces the rising warm air. Warm air is LESS DENSE than cold air.This movement of air is what makes the wind blow. It is called a convection current.
16Wind blows from areas of ThisWind blows from areas ofto areas ofhighpressurelowpressure
17High Pressure SystemIn a high atmospheric pressure system the atmospheric pressure of the air is higher than that of the air around it. (It’s less dense)High atmospheric pressure systems are marked by an H on a weather mapThey mean clear weather.
18Low Pressure SystemIn a low atmospheric pressure system the atmospheric pressure of the air is lower than the air around it. The air is more dense.Low atmospheric pressure systems are symbolized by an L on a weather map.They mean storminess and precipitation
19FrontA place where two air masses of different temperatures meet.
20Jet Stream The jet stream is a fast flowing, river of air. They form at the boundaries of connecting air masses that have big differences in temperature, such as of the polar region (VERY COLD AIR) and the warmer air to the south (VERY HOT AIR).Because of the Earth's rotation the streams flow west to east.
21Measurements wind speed air pressure anemometer barometer [ORIGIN from Greek anemos ‘wind’][ORIGIN from Greek baros ‘weight’]
23Atmospheric MovementThis is the large scale movement of air throughout the atmosphere.This movement, by air currents, is how heat is distributed all over our planet.
24Global PatternA global pattern is something that affects the entire world. It is a pattern that is seen throughout the world.Weather patterns are examples of global patterns. Climate has global patterns.These are systems that are important because they affect our entire planet.
25Read the passage and complete the map of global wind patterns EasterliesWesterliesTrade WindsDoldrums
31What Does It All Mean? Remember: The H stands for a High Pressure systemThis means CLEAR WEATHERThe L stands for LOW pressure systemThis means STORMY weather
32What are Air Masses????Large areas (blobs) of air that have the same weather, temperatures and humidityWeather changes occur with changes in air masses
33What Are Fronts??? Fronts are the boundary between two air masses They bring changes in the weather (from west to east)Fronts are named for the air that is behind them
34Cold Front Cold dense air pushes warm air out of the way Cold fronts move very quickly and bring short periods of rain/thunderstormsLower temperatures are behind the frontSYMBOL – the direction of the “arrows” points towards the direction the front is MOVING
37Warm FrontWarm air moves up the cold front as it slowly displaces the cold airWarm fronts move slowly, and bring many days of steady precipitationHigher temperatures are behind the frontSYMBOL – direction of “half-moons” is the direction the front is moving
40Stationary FrontThe air from the warm front and cold front meet, but do not moveThese fronts have the same weather as warm frontsSYMBOL – warm and cold fronts are moving in opposite directions, thus making a stationary condition
41Let’s see it on the map!Stationary FrontCold FrontWarm Front