1 Severe Weather A Reading A Z Level T Leveled Book Word Count: 1,775 LEVELED BOOK T SEVERE WEATHER Written by Bruce D. Cooper Illustrated by Cende Hill Visit for thousands of books and materials.
3 Glossary air pressure..the.force.of.the.air.in.the.atmosphere. when pulled to Earth by gravity (p..9) atmosphere..a.layer.of.gases.surrounding.a.planet. (p..6) SEVERE WEATHER avalanche. blizzard. dust devils. hail..a.wall.of.snow.that.slides.swiftly.down. a.mountain.(p..23).a.severe.snowstorm.with.cold. temperatures.and.heavy.snow.drifts.. (p..22).currents.of.air.whirling.upward.from. the.ground.in.a.spiral.motion.(p..19).round.pieces.of.ice.that.sometimes.fall. during.thunderstorms.(p..15) precipitation..moisture.that.falls.to.the.ground,.such.as. rain,.snow,.hail,.or.sleet.(p..12) temperature..the.degree.of.hotness.or.coldness. of.anything,.usually.as.measured.. on.a.thermometer.(p..5) water vapor. water.in.the.form.of.gas.(p..11) waterspout. whiteout..a.whirling,.funnel-shaped.or.tubelike. column.of.air.occurring.over.water,.. usually.in.tropical.areas.(p..19).a.condition.that.occurs.during.a.severe. blizzard.when.visibility.is.very.limited.. and.everything.looks.white.(p..22)... Written by Bruce D. Cooper Illustrated by Cende Hill 28
4 Photo Credits: Front cover, page 18: Courtesy of OAR/ERL/National Severe Storms Laboratory (NSSL)/NOAA; back cover, page 16: PhotoDisc; title page, pages 14, 15, 17: Courtesy of NOAA/OAR/ERL/National Severe Storms Laboratory (NSSL); page 4: istockphoto/tupungato; page 5: Peter Barritt/SuperStock; page 10: Corbis/SuperStock; page 19: R H Productions/Robert Harding World Imagery/ Corbis; page 21: Courtesy of Robert Kaufmann/FEMA; page 22: Mark Hayes/ Dreamstime.com; page 23: Courtesy of Dave Saville/FEMA News Photo Hurricane Safety Before a hurricane comes, board up windows. Pick up loose things in the yard. Get a battery- powered radio and store some water. If a hurricane is moving into your area, go to higher ground far inland. Severe Weather Level T Leveled Book Learning A Z Written by Bruce D. Cooper Illustrated by Cende Hill All rights reserved. Correlation LEVEL T Fountas & Pinnell Reading Recovery DRA P If you cannot leave the area, get inside a concrete building on the highest ground available. Stay away from doors and windows. Do not go outside. 27
5 Tornado Safety The key word in tornado safety is DOWN. Go to a basement if you can. If you are in a building without a basement, go to a closet or bathroom. In either case, get under a heavy piece of furniture or inside the bathtub and protect your head and neck with your arms. Table of Contents Introduction...4 Building.Blocks.of.Weather...5 Temperature...6 Air.Pressure....9 Wind...10 Moisture Thunderstorms...14 Tornadoes...18 Mobile homes usually collapse or get blown off their foundations during a tornado. If you are inside one, get outside, preferably to a basement. Otherwise, lie down in a ditch or depression in the ground and protect your head and neck with your arms. Don t get in a car or other vehicle; vehicles have been blown over a mile away by tornadoes. Hurricanes,.Typhoons,.. and.tropical.cyclones...20 Blizzards...22 Storm.Safety...24 Glossary...28 Stay away from doors and windows. 26 3
6 Introduction Weather.can.be.calm.and.peaceful,.or.. it.can.be.fierce.and.violent..we.experience. fierce,.violent.weather.in.the.form.of.storms.. Every.place.on.Earth.can.experience.some. type.of.violent.storm..we.will.explore.types.. of.violent.storms,.but.first.let s.look.at.the. causes.of.weather. Do not stand on a hilltop or open field. If you are in or on the water, get out or get off. Do not carry anything made of metal. Do not use the telephone. If lightning strikes the phone line, the strike can travel to you if you are holding the phone. If you must call someone, use a cordless phone or a cell phone. Do not use electrical appliances. Lightning could follow the wire. Threatening storm clouds gather over a road. Stay away from plumbing pipes (sink, bathtub, or shower). Lightning can cause an electrical charge in the metal pipes. 4 25
7 Storm Safety It.pays.to.know.what.to.do.when.a.storm.. is.coming..it.can.save.your.life..here.are.some. safety.tips. Thunderstorm Safety Look for shelter, such as a building or car. No matter what, do not take shelter under trees because trees attract lightning. If you are in the open, never lie down on the ground during a storm, because after lightning strikes, it usually spreads out on the ground. The safest position is to put your feet close together and crouch down with your head as low as possible, curled up in a tight squat. Sun, air, and moisture are the building blocks of weather. Building Blocks of Weather When.you.think.of.good.weather,.you. probably.think.of.sunshine,.but.you.might.be. surprised.to.know.that.the.sun.is.responsible. for.bad.weather,.too..in.fact,.the.sun.is. responsible.for.all.weather. Let s.talk.about.the.things.that.make.the. weather.what.it.is the.building.blocks.of. weather..these.are.temperature,.air.pressure,. wind,.and.moisture..let s.learn.how.the.sun. affects.these.things. 24 5
8 Temperature Weather.is.caused.by.changes.in.the. atmosphere,.the.air.that.surrounds.earth.. All.weather.begins.when.energy.from.the.Sun. strikes.the.earth..when.sunlight.hits.the.earth,. it.is.either.absorbed.by.the.earth.or.reflected. back.into.the.atmosphere..the.sunlight.that.is. absorbed.changes.to.heat..this.heat.comes.off. the.earth s.surface.like.heat.from.a.hot.stove,. and.it.heats.the.air.that.surrounds.earth. These.fierce.storms.can.collapse.buildings,. bury.cars.and.trucks,.and.knock.out.electrical. power..in.the.mountains,.heavy.snowfall.can. lead.to.avalanches..avalanches.are.huge.walls. of.snow.that.break.loose.and.tumble.down.. a.mountainside..they.have.been.known.to. bury.entire.villages. ATMOSPHERE The Earth s surface heats the air above it. An avalanche buried this car. 6 23
9 Do You Know? A single snowflake can be made of 50 or more individual ice crystals clustered together. SUN Sunlight only hits half the Earth at any one time. Blizzards make driving very dangerous. Blizzards The.most.fierce.winter.storm.is.called.. a.blizzard..this.is.a.storm.that.has.heavy. snowfall.and.high.winds.of.over.56.kilometers. per.hour.(35.mph)..sometimes.visibility.is.so. limited.that.the.blizzard.is.called.a.whiteout.. Blizzards.can.dump.several.feet.of.snow. quickly..this.snow.blows.around.and.piles.up.. into.huge.drifts.of.up.to.15.2.meters.(50.ft).. Now,.not.all.of.the.Earth.is.heated.equally.. Since.the.Earth.is.a.giant.rotating.ball,.only.half. of.it.is.facing.the.sun.at.any.time..while.the. sunny.side.gets.heated,.the.dark.side.loses. heat..in.addition,.some.places.absorb.more. sunlight.than.others..for.example,.if.sunlight. strikes.a.dark.surface,.it.will.be.absorbed.more. quickly,.and.the.surface.will.get.hotter..also,. land.heats.up.more.quickly.than.water. TRY THIS: Unequal Heating Place a piece of black paper and a piece of white paper in the sun. Let them sit for a couple of hours. Feel both pieces of paper before and after. Which one gets warmer? Place a thermometer on each piece of paper to see how much warmer one is than the other. 22 7
10 The.Sun s.rays.also.strike.more.directly.. near.the.equator,.which.means.that.water.and. land.around.the.equator.get.hotter..sunlight. strikes.areas.around.the.poles.at.a.sharp.angle.. Angled.light.does.not.get.absorbed.as.much.. as.direct.light,.which.explains.why.the.poles. are.colder..also,.the.poles.are.covered.with. snow.and.ice,.and.these.light-colored.surfaces. do.not.absorb.sunlight.as.well. The angle of sunlight creates cold poles and a warm equator. Hurricanes can cause a lot of damage. These.huge.storms.can.be.hundreds.of. miles.across..they.have.three.parts..in.the. center.is.the.eye.of.the.storm,.where.the.. air.is.calm..the.eye.is.surrounded.by.a.wall.. of.swirling.clouds.containing.strong,.violent. winds..these.winds.whirling.around.the.. center.can.reach.over.322.kilometers.per.hour. (200.mph)..The.third.part.is.the.rain.bands,. which.are.bands.of.thunderclouds.that.reach. out.from.the.wall.and.produce.heavy.rain.. The.damage.from.these.storms.is.done.by. wind.and.flooding..when.these.large.storms. reach.land,.they.push.large.mounds.of.water. ahead.of.them..when.these.mounds.of.water. hit.land,.boats.and.buildings.may.be.swept. away.and.destroyed..the.heavy.amount.of.. rain.can.also.cause.serious.flooding. 8 21
11 Hurricanes, Typhoons, and Tropical Cyclones During.the.warm.months.of.the.year,.. great.masses.of.warm,.moist.air.form.over. warmer.parts.of.the.ocean..they.begin.. to.swirl.around.when.cooler.air.moves.in.. to.replace.the.rising.warm.air..when.this. happens,.huge.storms.form..these.storms.. have.different.names,.depending.on.where.. in.the.world.they.occur..look.at.the.world. map.to.see.what.these.storms.are.called.. in.different.parts.of.the.world. COLD AIR Cold air is heavier, while warm air is lighter. WARM AIR Air Pressure hurricane tropical cyclone hurricane tropical cyclone typhoon Tropical ocean storms have different names in different parts of the world. The.air.in.the.atmosphere.has.weight,.and.. it.is.being.pulled.toward.the.earth.by.gravity.. Because.it.is.pulled.down,.it.pushes.against. things..this.is.what.we.call.air pressure..we. know.that.cold.air.is.heavier.than.warm.air,. and.because.of.this,.it.pushes.down.with.more. pressure..this.air.is.called.high-pressure.air.. Scientists.have.learned.that.high-pressure.air. always.moves.toward.warmer,.low-pressure.air.. The.colder.air.being.pulled.toward.the.Earth. pushes.the.warmer.air.up. 20 9
12 Wind can be gentle or violent. Wind Wind.is.caused.by.the.unequal.heating.. of.the.earth..the.unequal.heating.causes.. some.air.to.be.warmer.than.other.air,.which. leads.to.a.difference.in.air.pressure..the. unequal.heating.and.the.differences.in.air. pressure.set.air.in.motion,.creating.wind.. The.greater.the.difference.in.temperature.. and.pressure.between.two.large.masses.of.. air,.the.stronger.the.wind.along.the.borders.. of.these.air.masses. Waterspouts are often beautiful. When.a.tornado.occurs.over.water,.it.is. called.a.waterspout..whirlwinds,.sometimes. called.dust devils,.form.when.hot.air.spins. up.from.the.ground.over.bare.soil.and.deserts.. These.are.different.from.tornadoes.and. waterspouts,.which.spin.down.from.clouds
13 Tornadoes Tornadoes,.which.have.the.strongest.winds. on.earth,.have.wind.speeds.that.may.reach. 322.to.480.kilometers.per.hour.( mph)..tornadoes.rarely.last.more.than.thirty. minutes,.but.they.can.do.great.damage..they. can.flatten.buildings,.pick.up.cars.and.trucks,.. and.tear.out.trees.by.the.roots.. Tornadoes.form.when.warm.air.rises.very. quickly..cold.air.rushes.in.to.replace.the.rising. warm.air..it.moves.in.so.fast.that.it.begins.. to.rotate.or.spin,.and.this.spinning.causes.. a.funnel.cloud.to.form. Do You Know? On average, the United States experiences 100,000 thunderstorms each year, causing about 1,000 tornadoes. Moisture The.Sun.also.heats.water.in.lakes,.rivers,. and,.most.importantly,.oceans..the.sun s. energy.causes.water.to.evaporate.and.. form.water vapor,.which.is.an.invisible.gas.. Water.vapor.in.the.air.has.a.lot.to.do.with.. the.weather.we.experience. TRY THIS: Make Your Own Cloud When you are outside on a cold winter day, you can usually see your breath. This happens in the same way that clouds are formed. The air of your breath is warm and moist. When you breathe out, the warm, moist air rises and meets the cold outside air. The water vapor in your breath changes to tiny drops of water and turns into a little cloud. Do You Know? It takes about a million cloud droplets to form an average raindrop
14 Warm.air.can.hold.more.moisture.than.cold. air,.and.cold.air.constantly.pushes.this.warm,. moist.air.upward..as.this.warm.air.rises,.it. cools.down,.and.the.water.vapor.begins.to.get. squeezed.out..when.this.happens,.the.water. vapor.changes.to.tiny.water.droplets.that.form. clouds..the.water.droplets.continue.to.cool.. and.join.together.in.clouds..in.time,.they.get.. so.big.that.they.are.pulled.to.the.earth.by. gravity..precipitation.is.the.name.we.give. to.this.water.falling.to.the.earth.. Precipitation can be in the form of rain, snow,.or.ice..the.kind.of.precipitation.that.. falls.depends.on.the.temperature.in.the.clouds. and.the.temperature.between.the.clouds.and. the.ground..this.table.shows.the.conditions. needed.for.different.kinds.of.precipitation. Now.that.we ve.learned.about.the.building. blocks.of.weather,.let s.learn.what.happens. when.conditions.are.extreme..remember,. violent.storms.happen.when.temperature,.. air.pressure,.wind,.and.moisture.are.extreme.. Do You Know? A bolt of lightning is hotter than the surface of the sun. You.can.tell.how.far.away.lightning.is.. by.counting.the.number.of.seconds.between. the.time.you.see.lightning.and.the.time.you. hear.thunder..if.you.count.five.seconds,.. the.lightning.is.1.6.kilometers.(1.mi).away.. from.you..if.you.count.ten.seconds,.it.is kilometers.(2.mi).away
15 Thunderstorms.get.their.name.from.. the.lightning.and.thunder.they.produce.. Lightning.can.go.from.one.cloud.to.another. cloud,.or.it.can.go.from.cloud.to.ground.or. from.ground.to.cloud. Lightning,.which.is.very.hot,.heats.the.air.. to.cause.thunder..the.hot.air.expands.very. quickly,.which.creates.a.shockwave..when.the. wave.reaches.your.ear,.you.hear.it.as.thunder. Conditions Needed for Different Kinds of Precipitation Temperature in the clouds Rain Snow Above or below freezing Below freezing Sleet and freezing rain Above freezing Hail Above freezing in the lower cloud and below freezing in the upper part of the cloud. Also, high winds blowing upward in the cloud. Temperature between the clouds and ground Above freezing Below freezing Below freezing. May start as ice, then melts, then freezes again as it passes through freezing air near the ground. Above freezing Lightning usually strikes the tallest object around
16 Do You Know? There are approximately 40,000 thunderstorms in the world every day. Every day someone is struck by lightning. Strong.wind.in.a.thunderstorm.can.blow. large.water.drops.far.up.in.the.cloud,.where. they.freeze..then.they.begin.to.fall.and.collect. more.moisture..the.wind.can.blow.the.ice. pellets.back.up.into.the.cloud,.where.another. layer.of.ice.forms.on.the.pellets..sometimes. this.happens.many.times.to.the.same.ice. pellets..each.time,.they.get.bigger.until.they. become.too.heavy.for.the.wind.to.blow.them. back.up..then.they.fall.as.hail..hailstones. the.size.of.baseballs.and.grapefruits.have.. been.reported. Thunderclouds over the prairie Thunderstorms Thunderstorms.are.the.most.common.. type.of.storm..they.usually.occur.during.hot,. humid.weather,.and.they.form.when.warm,. moist.air.rises.quickly..tall.clouds.form,.and. large.amounts.of.water.vapor.in.these.clouds. form.water.drops.very.quickly. 14 The ruler (bottom left) shows the size of this hailstone. 15
Severe Weather A Reading A Z Level T Leveled Reader Word Count: 1,801 LEVELED READER T Written by Bruce D. Cooper Illustrations by Cende Hill Visit www.readinga-z.com for thousands of books and materials.
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Teacher s Notes Setting Up a Weather Station This activity is a great group activity allowing each student to participate both when they make the station and then by continuing to make their own observations.
ATM S 111, Global Warming: Understanding the Forecast DARGAN M. W. FRIERSON DEPARTMENT OF ATMOSPHERIC SCIENCES DAY 1: OCTOBER 1, 2015 Outline How exactly the Sun heats the Earth How strong? Important concept
Thunderstorms and lightning... the underrated killers! MANSCEN SAFETY OFFICE Fort Leonard Wood, MO Agenda Thunderstorms...and their offspring Flash Floods/Floods Lightning Straight-line Winds Large Hail
LIGHTNING SAFETY: OUTDOOR COMMUNITY PREPARDNESS FACILITY: POINT OF CONTACT: Address: Phone/E-mail: WHEN THUNDER ROARS, GO INDOORS! Overview The National Weather Service (NWS) has implemented a voluntary
1. Which single factor generally has the greatest effect on the climate of an area on the Earth's surface? 1) the distance from the Equator 2) the extent of vegetative cover 3) the degrees of longitude
EL Civics Objective 16 (Emergencies) Level: Beginning Low & Beginning High Task #1: Identify Emergencies & Disasters Language & Literacy Objectives: 1. Identify what constitutes an emergency or disaster,
HEAT PUMP FREQUENTLY ASKED QUESTIONS HEAT PUMP OUTDOOR UNIT ICED-UP DURING COLD WEATHER: It is normal for a heat pump to have a build up of white frost on the outside coil during cold damp weather. The
Weather Weather: is the short term, day-to-day condition of the atmosphere Meteorology the scientific study of the atmosphere They focus on physical characteristics and motion and how it relates to chemical,
National Weather Service Aberdeen, South Dakota April 2013 Inside this issue: Severe Weather Awareness Impact Based Warnings Impact Based Warnings (cont) Record Cold March Record Cold March (cont) Seasonal
Polar Regions of the Earth A Reading A Z Level S Benchmark Book Word Count: 1,028 B E N C H M A R K S Written by Elizabeth Austin Visit www.readinga-z.com for thousands of books and materials. www.readinga-z.com
EMERGENCY RESPONSE PROCEDURES Emergency Telephone Numbers Life Threatening Emergency................................. 911 Local Police............................. Local Fire and Paramedics.................
FOURTH GRADE WORKBOOK student Math/Science Nucleus 1990,2001 WATER CYCLE - WATER (4) TRY AND LOCATE THE PARTS OF THE WATER CYCLE ON THE ABOVE CARTOON. USE THE NUMBERS. DRAW IN ITEMS THAT MIGHT NOT BE DRAWN.
Heat Transfer: Conduction, Convection, and Radiation Introduction We have learned that heat is the energy that makes molecules move. Molecules with more heat energy move faster, and molecules with less