1、by Sam Mayillustrated by Jim Kelly|xHSKBPDy500794zv*:+:!:+:!ISBN-13:978-0-15-350079-4ISBN-10:0-15-350079-4GRADE 3Lesson 21WORD COUNT498GENREExpository Nonfi ctionLEVELELLHarcourt LeveledReaders Online Database RXENL08ARD3E21_ELL_COV.indd 2-3RXENL08ARD3E21_ELL_COV.indd 2-311/16/06 7:14:29 PM11/16/06
2、7:14:29 PMCover,Tom Benoit/SuperStock;p.5,ThinkStock/SuperStock;p.6,David Young-Wolff/PhotoEdit;p.8,p.10,Corbis;p.9,Eye of Science/Photo Researchers,Inc.;p.11,Tom Rosenthal/SuperStock;p.12,Zee Evans/NSF.Copyright by Harcourt,Inc.All rights reserved.No part of this publication may be reproduced or tr
3、ansmitted in any form or by any means,electronic or mechanical,including photocopy,recording,or any information storage and retrieval system,without permission in writing from the publisher.Requests for permission to make copies of any part of the work should be addressed to School Permissions and C
4、opyrights,Harcourt,Inc.,6277 Sea Harbor Drive,Orlando,Florida 32887-6777.Fax:407-345-2418.HARCOURT and the Harcourt Logo are trademarks of Harcourt,Inc.,registered in the United States of America and/or other jurisdictions.Printed in ChinaISBN 10:0-15-350079-4ISBN 13:978-0-15-350079-4Ordering Option
5、sISBN 10:0-15-349938-9(Grade 3 ELL Collection)ISBN 13:978-0-15-349938-8(Grade 3 ELL Collection)ISBN 10:0-15-357261-2(package of 5)ISBN 13:978-0-15-357261-6(package of 5)If you have received these materials as examination copies free of charge,Harcourt School Publishers retains title to the materials
6、 and they may not be resold.Resale of examination copies is strictly prohibited and is illegal.Possession of this publication in print format does not entitle users to convert this publication,or any portion of it,into electronic format.1 2 3 4 5 6 7 8 9 10 985 12 11 10 09 08 07 06 by Sam Mayillustr
7、ated by Jim KellyRXENL08ARD3E21_ELL.indd 1RXENL08ARD3E21_ELL.indd 111/16/06 7:18:46 PM11/16/06 7:18:46 PMRXENL08ARD3E21_ELL.indd 2RXENL08ARD3E21_ELL.indd 211/16/06 7:18:59 PM11/16/06 7:18:59 PM One day,Ms.Luft said to her class,“Please draw a picture of water.”Sam drew a picture of a lake.Emily drew
8、 a picture of a cloud.Matthew drew a picture of falling snow.Ashley drew a picture of ice cubes.3RXENL08ARD3E21_ELL.indd 3RXENL08ARD3E21_ELL.indd 311/16/06 7:19:11 PM11/16/06 7:19:11 PM Ms.Luft looked at all the pictures and smiled.“All of you are right,”she said.“These are all pictures of water.Let
9、s fi nd out some more.”4RXENL08ARD3E21_ELL.indd 4RXENL08ARD3E21_ELL.indd 411/16/06 7:19:25 PM11/16/06 7:19:25 PMWater as a Gas Water is found in three forms,or states.Water can be a gas,a liquid,or a solid.Heat causes water to change from liquid to a gas.However,it is still water.5RXENL08ARD3E21_ELL
10、.indd 5RXENL08ARD3E21_ELL.indd 511/16/06 7:19:38 PM11/16/06 7:19:38 PM When water is a gas,it is called water vapor.Steam is one kind of water vapor.There is water vapor in the air you breathe out.6RXENL08ARD3E21_ELL.indd 6RXENL08ARD3E21_ELL.indd 611/16/06 7:19:52 PM11/16/06 7:19:52 PMWater as a Liq
11、uid Liquid water is the water that fl ows in rivers.We swim in liquid water.We wash in liquid water.We also drink liquid water.Liquid water fi lls the oceans.Liquid water covers two-thirds of the earths surface.7RXENL08ARD3E21_ELL.indd 7RXENL08ARD3E21_ELL.indd 711/16/06 7:20:06 PM11/16/06 7:20:06 PM
12、Frozen Water Water freezes when its temperature is 32 Fahrenheit(0C)or lower.It is still water,but it is solid.Clouds are made of tiny droplets of water,tiny pieces of ice,or both.One kind of icy cloud looks like feathers in the sky.This cloud is made of tiny pieces of ice.8RXENL08ARD3E21_ELL.indd 8
13、RXENL08ARD3E21_ELL.indd 811/16/06 7:20:20 PM11/16/06 7:20:20 PM Ice and snow are two forms of solid water.A snowfl ake is made up of many tiny crystals of ice.Snow falls from clouds.Sleet and hail are also forms of ice that fall from clouds.Snowfl akes9RXENL08ARD3E21_ELL.indd 9RXENL08ARD3E21_ELL.ind
14、d 911/16/06 7:20:35 PM11/16/06 7:20:35 PM Frozen water takes other forms,too.The frost that forms on windows is one kind of frozen water.Icicles are another form.10RXENL08ARD3E21_ELL.indd 10RXENL08ARD3E21_ELL.indd 1011/16/06 7:20:51 PM11/16/06 7:20:51 PMIce Around the World In some parts of the worl
15、d,there is no ice and snow.In other parts of the world,there is ice and snow for part of the year.In still other parts of the world,there is ice and snow all year long.11RXENL08ARD3E21_ELL.indd 11RXENL08ARD3E21_ELL.indd 1111/16/06 7:21:06 PM11/16/06 7:21:06 PM The Arctic and the Antarctic are two pa
16、rts of the world where there is always ice and snow.Even the oceans freeze in those areas.12RXENL08ARD3E21_ELL.indd 12RXENL08ARD3E21_ELL.indd 1211/16/06 7:21:20 PM11/16/06 7:21:20 PMWeather Report:Cold and Icy Antarctica is a place at the southern tip of the world.It is always icy and cold there.Why
17、 is it icy?The snow never melts.The layers of snow change into ice.These layers of ice are called ice sheets.The ice sheets become thicker and thicker.This has happened for thousands of years.Today some of the ice sheets are about one mile(1.61 km)thick.The ice sheets are even thicker in some places
18、.13RXENL08ARD3E21_ELL.indd 13RXENL08ARD3E21_ELL.indd 1311/16/06 7:21:34 PM11/16/06 7:21:34 PM The ice sheets in Antarcticahold seven-tenths of the worlds fresh water.The ice sheets in Antarctica hold nine-tenths of the worlds ice.Antarcticas ice is so heavy that it has actually pushed the surface of
19、 the earth down!“Great job,everybody!”said Ms.Luft.“Any questions about water?”14RXENL08ARD3E21_ELL.indd 14RXENL08ARD3E21_ELL.indd 1411/16/06 7:21:54 PM11/16/06 7:21:54 PMTo the TeacherScaffolded Language DevelopmentCONCEPT REVIEW Review with students that water is found in three forms,or states.Wat
20、er can be a gas,a liquid,or a solid.Then divide the group into two teams.Tell teams that they are going to work together to identify whether something is a solid,liquid,or gas.Alternate giving the clues below to each team.Have students on the team work together to come up with the answer.Encourage s
21、tudents to answer in complete sentences and to answer chorally.A correct answer wins a point.Is this a solid,liquid,or gas?what you swim in steam in your shower a snowfl ake an ice cube early morning fog the stuff you drinkHave teams come up with other examples of solids,liquids,and gases.ScienceDra
22、w a Picture Have students divide a paper into three parts and label the parts solid,liquid,and gas.Then tell them to draw a picture that illustrates each form of water.Encourage students to draw the environment in which each form may occur;for instance,fog at sea.School-Home ConnectionWater Search H
23、ave students discuss with family members what they have learned in this book.Then ask them to identify three forms of water around the house and point out their fi ndings to family members.Word Count:498(508)RXENL08ARD3E21_ELL.indd 15RXENL08ARD3E21_ELL.indd 1511/16/06 7:22:10 PM11/16/06 7:22:10 PMRXENL08ARD3E21_ELL.indd 16RXENL08ARD3E21_ELL.indd 1611/16/06 7:22:25 PM11/16/06 7:22:25 PM