SCIENCE Student Book. 3rd Grade Unit 2

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1 SCIENCE Studnt Book 3rd Grad Unit 2

2 Unit 2 PLANTS SCIENCE 302 PLANTS Introduction 3 1. Plant Parts...4 Roots 6 Stms 8 Lavs 10 Food Storag Parts 11 Slf Tst Plant Growth Watr and Minrals 18 Carbon Dioxid 18 Sunlight 18 Tmpratur 20 Slf Tst Plant Changs Sds 26 Roots 30 Stms 30 LIFEPAC Tst Pull-out Bulbs 33 Plant Masurmnt 34 Slf Tst

3 PLANTS Unit 2 Author: Btty J. Andrson, M.A. Editor: Richard W.Whlr, M.A.Ed. Consulting Editor: Harold Wngrt, Ed.D. Rvision Editor: Alan Christophrson, M.S. Mdia Crdits: Pag 3: Imag sourc Pink, Thinkstock; 4: andrusk, istock, Thinkstock; 6: borzaszto, istock, Thinkstock; 8: Arkla, istock, Thinkstock; 10: Tnrsa, istock, Thinkstock; 11: ulimi, istock, Thinkstock; 17: kiko_jimnz, istock, Thinkstock; 18: jhsomwang, istock, Thinkstock; Mik Watson, moodboard, Thinkstock; 20, 39: Dorling Kindrsly, Thinkstock; 25: mrcds rancaño, istock, Thinkstock; 26: fotopitu, istock, Thinkstock; 32: Vlad-Romnsky, istock, Thinkstock; 33: idizimag, istock, Thinkstock; 34: fkdkondmi, istock, Thinkstock. 804 N. 2nd Av. E. Rock Rapids, IA MCMXCVI by Alpha Omga Publications, Inc. All rights rsrvd. LIFEPAC is a rgistrd tradmark of Alpha Omga Publications, Inc. All tradmarks and/or srvic marks rfrncd in this matrial ar th proprty of thir rspctiv ownrs. Alpha Omga Publications, Inc. maks no claim of ownrship to any tradmarks and/or srvic marks othr than thir own and thir affiliats, and maks no claim of affiliation to any companis whos tradmarks may b listd in this matrial, othr than thir own. 2

Unit 2 PLANTS PLANTS Look out your window. You probably s som kind of plants growing. Plants grow in many placs. Plants grow on th bottoms of dp ocans and on th tops of high mountains.

4 Unit 2 PLANTS PLANTS Look out your window. You probably s som kind of plants growing. Plants grow in many placs. Plants grow on th bottoms of dp ocans and on th tops of high mountains. Plants grow in dry placs and wt placs. Almost all placs on th arth hav plants. Plants hav many diffrnt shaps, sizs, and colors. Plants can hav bautiful flowrs, or plants can hav no flowrs at all. You will larn about som of th parts of plants. You will also larn what plants nd to hlp thm grow. You will larn how som plants ar lik othrs and how som plants ar diffrnt from othrs. Your study of this LIFEPAC will hlp you know how important plants ar. Objctivs Rad ths objctivs. Th objctivs tll you what you will b abl to do whn you hav finishd this LIFEPAC. 1. You will b abl to nam th thr main parts of a grn plant. 2. You will b abl to tll what job ach main part of a grn plant has. 3. You will b abl to tll what grn plants nd to grow. 4. You will b abl to tll why grn plants ar important. 5. You will b abl to nam som parts of plants that chang to mak nw plants. 6. You will b abl to masur changs in plants. 3

PLANTS Unit 2 1. PLANT PARTS Just as God taks car of you, God has givn plants th things thy nd to grow. Each part of th plant is important, just as ach part of your body is important.

5 PLANTS Unit 2 1. PLANT PARTS Just as God taks car of you, God has givn plants th things thy nd to grow. Each part of th plant is important, just as ach part of your body is important. Most of th plants w s vry day hav roots that mov and grow down. Ths plants also hav stms and lavs that grow up. Look at how som of th parts of a plant hlp it grow. Vocabulary Study ths nw words. Larning th manings of ths words is a good study habit and will improv your undrstanding of this LIFEPAC. brath (brēŧh). To forc air in and out of th lungs. cabbag (kăb ĭj). A vgtabl to at which has a round had and a short stm. carbon dioxid (kär b n dī ŏk sīd). A gas in th air which is ndd by plants. clry (sĕl rē). A grn plant to at which has long stms with lavs at th top. labl (lā b l). To put a nam on somthing. lttuc (lĕt s). A plant to at which has larg grn lavs. magnify (măg n fī ). To caus a thing to look largr than th ral siz. microscop (mī kr skōp ). A tool mad up of mirrors and a glass that maks things look largr. minral (mĭn r l). Matrial that is not animal or plant. obsrv ( b zûrv ). To s and not; notic. 4 Sction 1

6 Unit 2 PLANTS oxygn (ôks i j n). A gas in th air ndd by popl and animals. pas (pēz). A vgtabl to at which has round sds in a pod. soil (soil). Th ground, arth, dirt. stm (stĕm). Part of a plant that holds up th lavs. Not: All vocabulary words in this LIFEPAC appar in boldfac print th first tim thy ar usd. If you ar unsur of th maning whn you ar rading, study th dfinitions givn. Pronunciation Ky: hat, āg, cãr, fär; lt, ēqual, tėrm; it, īc; hot, ōpn, ôrdr; oil; out; cup, pu t, rül; child; long; thin; /ŦH/ for thn; /zh/ for masur; /u/ or / / rprsnts /a/ in about, // in takn, /i/ in pncil, /o/ in lmon, and /u/ in circus. Ask your tachr to say ths words with you. Tachr chck: Initials Dat Not to th Tachr: Prviw all of th xprimnts in this LIFEPAC. Many tak svral days and should b startd arly to assur timly compltion of this unit. Sction 1 5

7 PLANTS Unit 2 Roots Roots ar th part of th plant that is in th ground. Th roots of th plant hold th plant in th ground. On ach root ar tiny root hairs. Ths tiny root hairs grow into th soil. Thy tak in watr and minrals. Th plant uss watr and minrals to mak food. Without watr and minrals, th plant cannot grow. Roots ar important. LOOK FOR ROOT HAIRS You will nd ths things: a small plant magnifying glass Follow ths dirctions. Chck th boxs as you do ach stp. 1. Carfully dig up a small plant. 2. Gntly wash away th dirt. 3. Look for small hairs on th roots. Ths ar th root hairs. 4. Look at th roots through a magnifying glass. (Continud on th nxt pag) 6 Sction 1

8 Unit 2 PLANTS Draw and labl a pictur of th root hairs that you obsrvd. 1.1 Each tim you mak a drawing, follow ths ruls: 1. Draw only what you s. 2. Draw with simpl lins. 3. Draw a straight lin from ach part of your drawing to a clan part of your papr. 4. On th whit spac of your papr, clarly print th labl for ach part of your drawing. Tachr chck: Initials Dat Sction 1 7

9 PLANTS Unit 2 Writ th answrs in th blanks. 1.2 Many grn plants hav that hold th plant in th ground. 1.3 Many grn plants hav a. and b. that grow up. 1.4 Root hairs tak a. and b. from th soil. Stms Now look at a plant s stms. Ths stms ar lik tiny pips. Watr and minrals can travl through th stm. Th stm taks watr and minrals to th lavs, whr th plant s food is mad. Stms ar many diffrnt sizs. Th big tr trunk is a stm. Th stm of a cabbag plant is so short that you may not s it. Vins ar a kind of stm. Th tiny tubs in th stm of a clry plant ar asy to s. 8 Sction 1

10 Unit 2 PLANTS STUDY A STEM You will nd ths things: a small jar with watr food coloring a clry stm magnifying glass Follow ths dirctions. Chck th boxs as you do ach stp. 1. Cut off a pic of clry stm. 2. Look at th nd of it with your magnifying glass. Th darkr dots you s ar th tiny tubs. 3. Put som food coloring in a small jar of watr. 4. Put th clry stm in th watr. 5. Lt it st for a fw hours. 6. Look at th clry stm again. Writ what you saw. 1.5 Sction 1 9

PLANTS Unit 2 Writ th answrs on th blanks. 1.6 Th tiny pips of a plant ar found in its. 1.7 Th stm carris watr and minrals to th of th plant. 1.8 Th plant s is mad in its lavs.

11 PLANTS Unit 2 Writ th answrs on th blanks. 1.6 Th tiny pips of a plant ar found in its. 1.7 Th stm carris watr and minrals to th of th plant. 1.8 Th plant s is mad in its lavs. Lavs Th lavs of grn plants hav tiny opnings in thm. To s ths opnings, you will nd th hlp of a microscop. A microscop maks things look much biggr than thy rally ar. Th tiny opnings ar important to hlp th plant grow. Carbon dioxid, a gas from th air, ntrs th laf by th opnings. Carbon dioxid is givn off by popl and animals whn thy brath. Whn plants us carbon dioxid, thy giv off a gas calld oxygn. Popl and animals nd oxygn to liv. Som of th watr in th plant is givn off through th lavs. Carbon dioxid gos into th lavs of th plant through tiny opnings lik thos in this pictur. Carbon Dioxid 10 Sction 1

12 Unit 2 PLANTS Food Storag Parts You hav larnd that all grn plants mak food. You know that th plants us part of th food thy mak. This food is usd to grow nw lavs and roots. What happns to th rst of th food? God mad grn plants in a spcial way. All th xtra food is stord somwhr in th plant. Som plants such as lttuc stor thir xtra food in th lavs. Many plants such as bts and carrots stor food in thir roots. Th clry plant stors food in its stm. Corn, bans, and pas stor food in thir sds. Still othr plants stor food in thir fruit. Could you say, thn, that you had roots, stms, and lavs for dinnr? Can you s th roots, stms, fruits, and sds in this salad? Sction 1 11

13 PLANTS Unit 2 Draw four plant parts you hav atn this wk. Tachr chck: Initials Dat 12 Sction 1

14 Unit 2 PLANTS Writ th answrs on th blanks. 1.9 Th tiny opnings in th lavs of plants tak in Plants giv off a. and a gas calld b. into th air All grn plants wr cratd by. Complt this activity On important rading rul says that if two vowls ar sid by sid th first vowl has a long sound and th scond vowl is silnt. Th word laf follows this rul. You har th long // sound but th lttr a is silnt. Mark th vowls in th following words. Put th long vowl mark (-) ovr th vowl you har. Draw a lin through th vowl you do not har. laf soak ban pa oak grain ho rad paint bad float toast grn bt rain plain Sction 1 13

15 PLANTS Unit 2 Choos th main ida Think about th things you hav rad about plant parts. You hav rad about plant roots. Th main job of th root is to tak in watr and minrals for th plant to us. Th main ida of th job of th root is to tak in watr and minrals. You also hav rad about a plant s stm and lavs. Writ th main ida for th job of ths plant parts. Th first on is don for you. Th root s job is taking in watr and minrals. a. Th stm s job is. b. Th laf s job is. Tachr chck: Initials Dat For this Slf Tst, study what you hav rad and don. Th Slf Tst will chck what you rmmbr. 14 Sction 1

16 Unit 2 PLANTS SELF TEST 1 Each answr = 1 point Match th words with th right manings. a. tak in carbon dioxid b. thing usd to mak things look largr c. tak in watr and minrals d. ground; arth; dirt. gas ndd by animals and popl to brath f. mak and stor food g. to caus to look largr h. plant s tiny pips i. matrial that is not plant or animal j. gas takn from th air by plants 1.01 roots 1.02 grn plants 1.03 minral 1.04 stm 1.05 microscop 1.06 lavs 1.07 carbon dioxid 1.08 oxygn 1.09 magnify soil Sction 1 15

17 PLANTS Unit 2 Writ th answrs in th blanks. Us th words from th list. air magnifying glass root hairs bts microscop carbon dioxid minrals carrots oxygn watr lavs roots stms Nam thr parts of a plant. a. b. c List thr things a plant nds to grow. a. b. c Nam two things usd to mak small things look largr. a. b Carbon dioxid is a gas plants tak from th Nam two plants that stor food in thir roots. a. b Plants giv off in th air On th roots of plants grow. Answr ths qustions Who mad all grn plants? How ar grn plants important to you? Tachr chck: Initials Scor Dat Sction 1

18 SCI_Gr3-5 SCI0302 Jan 16 Printing 804 N. 2nd Av. E. Rock Rapids, IA ISBN

SCIENCE Student Book. 3rd Grade Unit 9

SCIENCE Student Book. 3rd Grade Unit 9 SCIENCE Studnt Book 3rd Grad Unit 9 Unit 9 HEAT ENERGY SCIENCE 309 HEAT ENERGY Introduction 3 1. Whr Hat Enrgy Coms From...4 Friction 6 Fir 9 Elctricity 14 Our Bodis 18 Th Sun 21 Slf Tst 1 25 2. What Hat