原版英语RAZ 教案J67-Tornadoes (3).pdf

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1、Visit www.readinga- for thousands of books and materials.WritingWrite a newspaper article for children about tornadoes.Include facts from the book in your article.Social Studies and ArtMake a poster explaining how to stay safe during a tornado.Share your poster with your class.ConnectionsTornadoesA

2、Reading AZ Level J Leveled BookWord Count:438www.readinga-LEVELED BOOK JWritten by Keith and Sarah KortemartinJMPwww.readinga-What are tornadoes,and why are they dangerous?Focus QuestionWritten by Keith and Sarah KortemartinTornadoesLevel J Leveled Book Learning AZWritten by Keith and Sarah Kortemar

3、tinAll rights reserved.www.readinga-EF ScalefunnelmoiststrikesupercellstornadoesWords to KnowPhoto Credits:Front cover:Jason Politte/Alamy Stock Photo;back cover:Shalyn Phillips/Demotix/Corbis;title page:Masterfile/Corbis;page 3:A.T.Willett/Alamy Stock Photo;page 4:Martin Haas/D;page 5:Mike Hollings

4、head/Corbis;page 6:Eric Nguyen/Corbis;page 8(background):OAR/ERL/National Severe Storms Laboratory(NSSL);page 10:Kim Johnson Flodin/AP Images;page 11:Dennis MacDonald/age fotostock/SuperStock;page 12(top):Mike Theiss/National Geographic Creative;page 12(bottom):Tom Grundy/123RF;page 13:Clay Jackson/

5、The Advocate Messenger/AP Images;page 14:Jim Reed/Corbis;page 15:68/Ocean/CorbisCorrelationLEVEL JJ1718Fountas&PinnellReading RecoveryDRA3Table of ContentsIntroduction.4How Tornadoes Form .5Measuring Tornadoes.8Where Tornadoes Form.9Tornado Safety .11Conclusion.15Glossary.16 Tornadoes Level J4Introd

6、uctionWhat can lift roofs from buildings and sweep houses into the air?Tornadoes can!Tornadoes come in many sizes.Some tornadoes are only a few feet(1 meter)across.Others are more than a mile (1.6 km)wide.Some tornadoes touch down for a short time.Others travel for hundreds of miles.A tornado went t

7、hrough this houses roof and walls,and it turned the car upside down.3Table of ContentsIntroduction.4How Tornadoes Form .5Measuring Tornadoes.8Where Tornadoes Form.9Tornado Safety .11Conclusion.15Glossary.16 Tornadoes Level J4IntroductionWhat can lift roofs from buildings and sweep houses into the ai

8、r?Tornadoes can!Tornadoes come in many sizes.Some tornadoes are only a few feet(1 meter)across.Others are more than a mile (1.6 km)wide.Some tornadoes touch down for a short time.Others travel for hundreds of miles.A tornado went through this houses roof and walls,and it turned the car upside down.5

9、A supercell thunderstorm moves across Nebraska in June 2004.The thunderstorm led to a few tornadoes.How Tornadoes FormWhy do tornadoes happen?Scientists are not sure.Tornadoes come from giant thunderstorms called supercells.A supercell happens when warm,moist air rises to mix with cold,dry air.Torna

10、does Level J6The mixing of cold and warm air causes the air to spin.The spinning wind turns into a cloud in a funnel shape.As the cloud turns,the wind becomes stronger.When the funnel cloud touches the ground,it is a tornado.This funnel cloud became a strong tornado that hit Kansas in 2004.5A superc

11、ell thunderstorm moves across Nebraska in June 2004.The thunderstorm led to a few tornadoes.How Tornadoes FormWhy do tornadoes happen?Scientists are not sure.Tornadoes come from giant thunderstorms called supercells.A supercell happens when warm,moist air rises to mix with cold,dry air.Tornadoes Lev

12、el J6The mixing of cold and warm air causes the air to spin.The spinning wind turns into a cloud in a funnel shape.As the cloud turns,the wind becomes stronger.When the funnel cloud touches the ground,it is a tornado.This funnel cloud became a strong tornado that hit Kansas in 2004.7How a Tornado Fo

13、rmssupercellthundercloudrain and hail begin to fallwarm air risesair spinscool airmoves inair keeps spinning inside the thundercloudair spinningfunnel cloudthe funnel cloud touches down and travels over landthe tornado damages anything in its pathflying debrisTornadoes Level J8EF Scale ChartMeasurin

14、g TornadoesScientists have a way to measure the strength of tornadoes.They look at the harm caused by a tornado.They use the amount of harm to estimate the wind speed.They use a special scale called the EF Scale.The EF Scale measures the strength of the tornado.EF-5EF-4EF-3EF-2EF-1EF-0200+mph(322+km

15、ph)166200 mph(267322 kmph)136165 mph(219265 kmph)111135 mph(179217 kmph)86110mph(138177 kmph)6585 mph(105137 kmph)wind gustsEF Rating7How a Tornado Formssupercellthundercloudrain and hail begin to fallwarm air risesair spinscool airmoves inair keeps spinning inside the thundercloudair spinningfunnel

16、 cloudthe funnel cloud touches down and travels over landthe tornado damages anything in its pathflying debrisTornadoes Level J8EF Scale ChartMeasuring TornadoesScientists have a way to measure the strength of tornadoes.They look at the harm caused by a tornado.They use the amount of harm to estimat

17、e the wind speed.They use a special scale called the EF Scale.The EF Scale measures the strength of the tornado.EF-5EF-4EF-3EF-2EF-1EF-0200+mph(322+kmph)166200 mph(267322 kmph)136165 mph(219265 kmph)111135 mph(179217 kmph)86110mph(138177 kmph)6585 mph(105137 kmph)wind gustsEF Rating9Where Tornadoes

18、FormTornadoes may be hard tomeasure,but scientists have agood idea where theyll strike.Its true that a tornado can hit anywhere in the world at any time.Most tornadoes happen in the central part of the United States.This area is called Tornado Alley.Tornado AlleyCold,Dry AirWarm,Moist AirKANSASCOLOR

19、ADONEBRASKASOUTH DAKOTATORNADO ALLEYOKLAHOMATEXASTornadoes Level J10More than one thousand tornadoes strike Tornado Alley each year.The giant tornado that hit Moore,Oklahoma,in 2013 left behind a clear path.9Where Tornadoes FormTornadoes may be hard tomeasure,but scientists have agood idea where the

20、yll strike.Its true that a tornado can hit anywhere in the world at any time.Most tornadoes happen in the central part of the United States.This area is called Tornado Alley.Tornado AlleyCold,Dry AirWarm,Moist AirKANSASCOLORADONEBRASKASOUTH DAKOTATORNADO ALLEYOKLAHOMATEXASTornadoes Level J10More tha

21、n one thousand tornadoes strike Tornado Alley each year.The giant tornado that hit Moore,Oklahoma,in 2013 left behind a clear path.11Tornado SafetyThere is no way to be sure that a tornado will strike.The National Weather Service(NWS)tries to help people stay safe during tornadoes.If they put out a

22、tornado watch,a tornado might strike.If they put out a tornado warning,a tornado has been spotted.Weather scientists study weather maps to try to spot when a tornado will strike next.Tornadoes Level J12If there is a tornado warning,its important to get to a safe place.Go indoors.The safest place is

23、a basement.If you cant get to a basement,go into a closet or bathroom.Stay away from windows.This sign tells people that a shelter is nearby where they can find safety during a tornado strike.A tornado destroyed an entire house,but the underground shelter next to the house was not harmed.11Tornado S

24、afetyThere is no way to be sure that a tornado will strike.The National Weather Service(NWS)tries to help people stay safe during tornadoes.If they put out a tornado watch,a tornado might strike.If they put out a tornado warning,a tornado has been spotted.Weather scientists study weather maps to try

25、 to spot when a tornado will strike next.Tornadoes Level J12If there is a tornado warning,its important to get to a safe place.Go indoors.The safest place is a basement.If you cant get to a basement,go into a closet or bathroom.Stay away from windows.This sign tells people that a shelter is nearby w

26、here they can find safety during a tornado strike.A tornado destroyed an entire house,but the underground shelter next to the house was not harmed.13The spinning air in a tornado makes things fly around.This can be dangerous.Its always important to protect your head.You should get close to the groun

27、d.Go under a desk or table.You can even lie down in a bathtub.Children prepare for a tornado strike in school by bending down and crouching under their desks.Tornadoes Level J14It is not safe to stay in a mobile home in a tornado.If you are in a tall building,go to the stairs.If you are in a car,wea

28、r your seatbelt and lean forward.If you are outside,lie down on the ground.Famous Tornadoes A tornado in 1925 traveled more than 300 miles(483 km)through Missouri,Illinois,and Indiana.It killed 695 people,the highest number of people killed by a tornado in U.S.history.In 1992,a tornado in Mississipp

29、i carried a baby up into the air and left the child hanging from the branch of a tree.The baby was hurt but lived.In March 2012,a giant tornado swept through Henryville,Indiana.It was huge150 yards(138 m)wideand traveled a far distance52 miles(84 km).A tornado that hit Kansas in 2003 was so powerful

30、 that it caused a childs bicycle to wrap around a tree.13The spinning air in a tornado makes things fly around.This can be dangerous.Its always important to protect your head.You should get close to the ground.Go under a desk or table.You can even lie down in a bathtub.Children prepare for a tornado

31、 strike in school by bending down and crouching under their desks.Tornadoes Level J14It is not safe to stay in a mobile home in a tornado.If you are in a tall building,go to the stairs.If you are in a car,wear your seatbelt and lean forward.If you are outside,lie down on the ground.Famous Tornadoes

32、A tornado in 1925 traveled more than 300 miles(483 km)through Missouri,Illinois,and Indiana.It killed 695 people,the highest number of people killed by a tornado in U.S.history.In 1992,a tornado in Mississippi carried a baby up into the air and left the child hanging from the branch of a tree.The ba

33、by was hurt but lived.In March 2012,a giant tornado swept through Henryville,Indiana.It was huge150 yards(138 m)wideand traveled a far distance52 miles(84 km).A tornado that hit Kansas in 2003 was so powerful that it caused a childs bicycle to wrap around a tree.15ConclusionTornadoes are amazingand

34、scaryexamples of the power of nature.People still have many questions about tornadoes.What causes a tornado?What is it really like inside a tornado?Maybe we will find out one day.A tornado moves quickly across an open field.Tornadoes Level J16GlossaryEF Scale(n.)a way of measuring and rating tornado

35、es from 0 to 5 based on their wind speeds and the damage they cause;Enhanced Fujita Scale(p.8)funnel(n.)a cone-shaped tube that is wider at the top and is often used to pour liquid or powder into a small opening(p.6)moist(adj.)slightly wet;damp(p.5)strike(v.)to happen suddenly or appear(p.9)supercel

36、ls(n.)large rotating thunderclouds that reach high into the sky and often produce tornadoes,hail,and lightning(p.5)tornadoes(n.)fast-spinning,funnel-shaped clouds that touch Earths surface(p.4)15ConclusionTornadoes are amazingand scaryexamples of the power of nature.People still have many questions

37、about tornadoes.What causes a tornado?What is it really like inside a tornado?Maybe we will find out one day.A tornado moves quickly across an open field.Tornadoes Level J16GlossaryEF Scale(n.)a way of measuring and rating tornadoes from 0 to 5 based on their wind speeds and the damage they cause;En

38、hanced Fujita Scale(p.8)funnel(n.)a cone-shaped tube that is wider at the top and is often used to pour liquid or powder into a small opening(p.6)moist(adj.)slightly wet;damp(p.5)strike(v.)to happen suddenly or appear(p.9)supercells(n.)large rotating thunderclouds that reach high into the sky and of

39、ten produce tornadoes,hail,and lightning(p.5)tornadoes(n.)fast-spinning,funnel-shaped clouds that touch Earths surface(p.4)www.readinga-What are tornadoes,and why are they dangerous?Focus QuestionWritten by Keith and Sarah KortemartinTornadoesLevel J Leveled Book Learning AZWritten by Keith and Sara

40、h KortemartinAll rights reserved.www.readinga-EF ScalefunnelmoiststrikesupercellstornadoesWords to KnowPhoto Credits:Front cover:Jason Politte/Alamy Stock Photo;back cover:Shalyn Phillips/Demotix/Corbis;title page:Masterfile/Corbis;page 3:A.T.Willett/Alamy Stock Photo;page 4:Martin Haas/D;page 5:Mik

41、e Hollingshead/Corbis;page 6:Eric Nguyen/Corbis;page 8(background):OAR/ERL/National Severe Storms Laboratory(NSSL);page 10:Kim Johnson Flodin/AP Images;page 11:Dennis MacDonald/age fotostock/SuperStock;page 12(top):Mike Theiss/National Geographic Creative;page 12(bottom):Tom Grundy/123RF;page 13:Cla

42、y Jackson/The Advocate Messenger/AP Images;page 14:Jim Reed/Corbis;page 15:68/Ocean/CorbisCorrelationLEVEL JJ1718Fountas&PinnellReading RecoveryDRAVisit www.readinga- for thousands of books and materials.WritingWrite a newspaper article for children about tornadoes.Include facts from the book in your article.Social Studies and ArtMake a poster explaining how to stay safe during a tornado.Share your poster with your class.ConnectionsTornadoesA Reading AZ Level J Leveled BookWord Count:438www.readinga-LEVELED BOOK JWritten by Keith and Sarah KortemartinJMPGrade 1 Book 67