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Download WELCOME TO SCIENCE!!! UNIT 5 LESSON 8: Meteorology
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Transcript
WELCOME TO SCIENCE!!! Green Check when you have your notebook out and ready! UNIT 5 LESSON 8: Meteorology Student Expectations… Being part of this “school” is awesome! How can YOU make this ocean even more awesome??. = I will BE HERE! respond when my name is called, use polling tools , complete classwork, notes, and chat to participate! I will choose my attitude! I will demonstrate respect and follow directions for my classmates and teachers to help make their day! I will have fun learning! EVERYONE needs a working mic. Call 1-866-K12-care if it’s not working. Let’s get it fixed! What you can expect from class We will explore meteorology and how meteorologists tell weather. Essential question: How do meteorologists predict the weather? Exit ticket review! -> -> Exit ticket review! -> High pressure systems bring nice weather. Hot air can hold more water molecules. Cold air is more dense (heavy) than warm air. When hot and cold air collide, they can cause thunderstorms! Low pressure systems can bring wet weather! YUCK! Meteorologists like those at the National Hurricane Center use instruments to gather information about all weather conditions, not just about hurricanes. Radar, weather balloons, and satellites aid in measuring air pressure, humidity, temperature, and other data. Combining these measurements, meteorologists can predict whether a day is going to be sunny, cloudy, dry, or rainy. __weather ballooon__________, __radar____________, and __satalite_________ aid in measuring air pressure, humidity, temperature and other data. Closer to home, meteorologists use tools to measure air pressure and humidity, two very important factors that help predict weather. A barometer is a tool that measures air pressure. Air pressure measurements can provide information about developing winds. A hygrometer measures humidity. As you know, when air masses meet, water vapor in the air can condense and form precipitation. Barometer: Measures air pressure Video link: Yay it worked!!! O man it didn’t! When air pressure increases the mercury moves up. Quick check When the mercury goes up in a barometer, the air pressure goes down. FALSE Air pressure and humidity play major roles in the weather system. TRUE Once weather data is collected, meteorologists develop weather maps where they can see how air masses are approaching one another. By comparing a current map with maps from earlier in the day or week, meteorologists can track the movements of air masses and fronts. Then they can create a forecast of weather for the next few days. Observations made across earth’s surface reveal that similar weather conditions can occur at the same time over wide areas. This is due to the large size of air masses, which as you may recall are fairly even in temperature, humidity, and pressure on the earth’s surface. Yay I got it to work! O man I didn’t Since there is a lot of information to display, but not a lot of room symbols are used on weather maps to convey information. You have seen some of these symbols in this unit already. On the map to the right, “H” and “L” are used to show areas of high and low pressure. The isobars, or lines around them connect areas of equal pressure. Isobars look a lot like contour lines on topographic maps but connect areas of equal air pressure instead of elevation. Notice that around the center of an “L,” pressure increases as the bars move away from the center. It’s the opposite around an “H;” pressure decreases farther away from the center. isobars Weather symbols also show where and what kind of fronts are forming as air masses collide. A warm front brings drizzly weather. A cold front can cause heavy rain, thunder, and lightning. A stationary front may produce rainy or snowy weather for several days. An occluded front can cause light to heavy precipitation that may last several days. To the right, you can see the symbols meteorologists use to represent each type of front. Notice that the circles and triangles usually point to the right. That’s because weather moves from west to east. By examining weather maps, meteorologists can see how air masses, fronts, and high- and low-pressure systems are arranged. Weather forecasters figure out the weather that usually comes with these conditions and then make some predictions. You can see the symbols meteorologists use to represent each type of front. Notice that the circles and triangles usually point to the right. That’s because weather moves from west to east. Weather travels from East to West. FALSE What kind of weather will the lowpressure system ring to Chicago on Day 3? D Predict the weather for Denver on Day 3. A. Satellites gather weather data with global views of the surface and atmosphere. From high above the earth, weather satellites can take measurements with a much larger view than is possible with stations on the ground. Satellites can complete a world picture as the earth rotates beneath them, or monitor one place over a long period of time. Weather satellites are equipped with cameras that detect visible light, surface temperatures, clouds, and water vapor associated with storms and storm fronts. Do you know what they are? These are images of Hurricane Katrina, a costly and deadly hurricane that hit the United States in 2005. Katrina began as a tropical wave, developed into a tropical storm, and eventually into a Category 5 hurricane. The meteorologists at the National Hurricane Center (NHC) used tools such as radar and satellite to track the storm’s path. As the storm grew to massive size and changed its path, the NHC adjusted hurricane warnings to cover wider areas, saving lives all across Mississippi, Louisiana, and Alabama. Homework slide Exit ticket: Can be found on the Assignments page on Science website. End of the Quarter 2 is THURSDAY. PLEASE MAKE SURE ALL OF YOUR WORK IS COMPLETE.