Survey
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
Download Air mass
Document related concepts
no text concepts found
Transcript
Science Starter 4/29/15 1. Which type of air is more dense, warm air or cold air? 2. Fill in the boxes below by using your answer. What would the air particles look like in cold Cold Air Warm Air vs. warm air? 3. Which block above do you think would be stronger or have more “power?” Lesson Essential Question How can we use a map and frontal boundaries to predict potential weather conditions? Agenda 1. 2. 3. 4. 5. 6. Science Starter Rugby Video Frontal Boundary Notes Gallery Crawl Practice Exit Ticket Quick Review D C B A More QUICK Review • Which of the layers of the atmosphere experiences the greatest amount of pressure? • Which of the layers of the atmosphere is the farthest away from the earth? • Which layer of the atmosphere is the warmest? • Which layer of the atmosphere does weather occur in? • What is the difference between weather and climate? Time for a Video! Rubgy video Air Mass Notes • Air mass: – a large body of air with similar temperatures and amount of moisture – As it moves, the characteristics of the air mass change and so does the weather in the area 7 Different Types of Air Masses Air Masses are characterized by the surface they form over. (MOISTURE and TEMPERATURE) • Moisture of the source – Continental: forms over land (DRY) – Maritime: forms over water (HUMID) • Temperature of the source – Polar: forms in polar area (COLD) – Tropical: forms in tropical area (WARM) 8 Where would the 4 different air masses originate? mT, mP, cP, cT Fronts • The boundary that separates two air masses when they meet • There are 4 types of fronts… 11 Gallery Crawl Time! •Place your belongings under your tables •Grab your note sheet •Make sure you have something to write with Let’s Quickly Recap Warm Fronts • Warm air moves into an area formerly covered by cool air. • Light to moderate precipitation is created. This precipitation covers a large area and lasts for an extended period of time. • A gradual increase in temperature also occurs when a warm front passes. Symbol Cold Fronts • Cold, dense air moves into a region occupied originally by warmer air. • Temperatures drop after a cold front passes. • Heavy precipitation is found at a cold front because of the violent updraft created by the two air masses colliding, but this weather clears quickly after the front passes through an area. • Cold fronts move more quickly than warm fronts. Symbol Occluded Fronts – An active cold front overtakes a warm front (two fronts are involved, rather than two air masses). – Complex weather systems are created as a result. Symbol Stationary Fronts • Air flows between a warm and cold front. • Gentle to moderate precipitation occurs along a stationary front. Symbol Now Let’s Check for Understanding! 1) What’s the difference between a warm front and a cold front? 2) Which forms faster, a warm front or a cold front? 3) What type of weather is associated with warm fronts? 4) What type of weather is associated with cold fronts? 5) What happens at a stationary front? Diagram of the two main fronts! What kinds of fronts appear here? • http://willardscience7.pds.wikispaces.net/file/ view/curwx_600x405.jpg/200612280/curwx_ 600x405.jpg What’s Goin’ On? Comparing & Contrasting Cyclonic Systems With your table, complete a VENN DIAGRAM on hurricanes vs. tornadoes (Use your textbook - pages 573-577) →Each group will be responsible for writing one thing for the class consensus Venn Diagram on the board →at least 2 points comparing the two systems →at least 4 points on their differences. Consider: - speed - greatest damage - location of formation - time of formation/ predictability Hurricanes Tornadoes Comparing and Contrasting Tornadoes and Hurricanes •Spinning systems of low pressure •High speed winds Hurricanes ● Boundary: Hurricanes are not associated with fronts ● Front Symbol ● Pre-Weather: Rain and wind, cloudy skies ● Post-Weather: Some rain, wind, and usually clear skies ● Pressure: 920-1000 mb ● Isobars: ● Wind speed: 74 - 210 Tornadoes ● Boundary: Tornadoes generally form at occluded fronts ● Front Symbol: ● Pre-Weather: Warm, humid air collides with cold, dry air ● Post-Weather: Mostly calm, potential for winds ● Pressure: 850 to 1000 mb ● Isobars: ● Wind speed: 40-318 mph Exit Ticket Time Questions? Clear your desks!
