Science 7

SARASAS AFFILIATED SCHOOLS
Science Grade 7

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or otherwise, without the prior permission of the publishers.

FBoyreDwr oCrhda: mrat Nongmak
dese hcmwsaUncoc teahiSSE dgn tsciTh dnnoheecxarwideonhodhehnaeeaiixenggvrvareechpededaanlvdeteodvuurrnlfoephtraaalooeokceeerydnlcceeucc-ielsle-ceamtsskvrieonrrulgetvqdeageandtoabdiaiaaonaeinuldTSESWeaetpustdetuihtg,preietrssoiididgnavhhllnteaooaavstetasalsom’eshnowitimieaaneeetAocnnrsrr,ldikhlilpynstetiynaauafdsndtosntetehw.eac.faeoedteycnssftn.rvaswentse,cnrdeitrcSgalsahaooaaaleeciitytcvaitqatdqacneiaoatenaedecnonnssaral,aaehmorulucveis,txdr,hiencylmematttriearophkpfaeaheeheleteiswaeeaflatbicdooarotwsrieslluae.xinfnhiiospenboanfheuoohrfalts.wrtlnKoghsihSileplssgtgamlddalelfosyisywelarnenbnepc-ihtpirstvdcakacn.nsegaphenbghgnpaoreheeasbrlbnguePntoaerreamoiuswleTocTruenlatioeTodraoauieslrtwhsicnhotntrhinirtwadnmsfdhunsehntsnbaiioeeaml,gcaadhifnaamtosirgdegnbdgmlfsesslbiauioiulae,len,ibnlasssueesessasoynlToetahdamarsdacheeuithaiecnlrneodhmdlouamfknoitetedmeilonnathhladhetsrneaefbvuadvorepitargtoefnee,fassadeithreaecrjrgxmloeiretefotutgdatodttlleurenoraaehctladsshritacslaaibnvemaaeotcr,gatocae.l,fdeoucdeteooiltedfondaasnltecerbgpetnhsaeaerhssraoaodd.letleh,eior.ivsaeofeirdsmehMtmfknTaoaiooetciwtstsesTtyrinhraulshhahntnceursdseahrousc.lEheagescoirettuhpntosgucuIPTaendietrsmetaaaptnstphbeodrsrcshhsiogwgoatnteabceaspaebtstesiweklaTluofascedoiyiltedovinprrisyet.rssasihlouodnpvhomhveiesoogcsncTsahdfasnmstprieiveraafnshnfniiokpthhrnn.i,etimnteurphfnvldedieiobegsmianoetoeTdovnYSnlnaetoiapyaisiponnmosenchnfvbloMdatpTmrtnetltreogsdlleiahetclgblnosirhosieie.oaaoeninavkaas.ratrongysapnTttfhtditppasbigmstseoMasuihfiisbckitehtmvinsosetiaraesnhbreoaeahseoetaorbpitactbrsrrsshtreeielrnrumotniypva,nyireyeeceenimhselnpoenbsAohiielwSypn,cdllontpastotcaed.elcaojaEenef.itarsaetlgedeesffsihsm.OrhohulstdennivTrauclpeculeaEstoMlaevaicoatecdghnheafsstrhahrqkrbdqaoossvefieoesloeasenrtfeaobletiuealleueuritsosrdostietPehtcrlotearntcoosaadcashhsmsoomwuelbdeelidnstdaforalabeBeEicvbtpaeySdotueofcofotumhtrbsrooii.mhenoioinefyrccresshuposle-eoiSoceiTiegfadnltEihatdnmgeantieyiotanpuathnebmlreiotrngfsgtt.irmnnpdT,isaoiatrserheogaiaxoogghualiludhraohrrnieaiructupotnolonnohelpakmssicesaiwdtvagharosnfaggdtaloehie.aleehlnhrtrsuruo-otenrrse,aacplstt,dysanole.lteltd

a ttwtTu opawntccItohhhsnnnoeofheiieeitlswlnddderlEthlpihsebrsgenpbupumuatctserrTTOguhrrosnensaktnopahhdileenatidcktnieclastiiouelessretgesfeahtndisltnihvarr.hbntspediastoeetauEatoeosipthnwfomihlsaals.wossasredneioecnokt.lonmhtlssdewThdvcoiderecsmfehiafefugnnitoeiendneoerusancrgrrnecoyneponkiodtcsfattthcaldoeoeuiuoeyopvoeetfsnnljenlslelournltyyssrsaotmhclbrblseyiucyaibvoeebento.rariwgaifuvu,erldeowOteltnaespesaenaekttodh.lnertlrhcsifusaleinoroeeifaTaeankdnurabrilht,ts,tgdloolnhbwliitidofenaffshnaoaeosioiremgsnetletrpa.aluhsfvt.ttp-wlTtsprcpreeehShsdoethrirpelaeoueecootdoxihlocsldnivlepipvuceasirhiecansriicrodtncnnceineasgtanstcetggirioutissotttsdessbueesaeentttbaotdanIhilsxahumfturowstewoi,aonedestskoaunrmdyooetauafnltmhutrahnspclrbhktdSseletahtadhleleisoceednseamteeislwpfosteitctormkhabrohtrtneniikrueotoetaeeeauhevtpdpiilfethiriftnroroeaaibeeeinacedairwqrnrnyrtnglelieapid,utattsdrssneeorqkaeeelstt’trrfewuhuivsoastemlslwaiaeeedthtftssahfeinilhvlfeteentnisonoirtdeaostnroytapdrhiualtfntltnomeoeskhdcwgnoctdpdengreceefuyouaproytonwiansEmsnhtmsow,hrtirtnaendilrawrdwbrneplogttegoatuiileocarheaoleldunointrertisrnnvtgghcdnbcviierheatsaeehheteesyyr...lll

Chamrat Nongmak, PhD.
FormeTrhDeeMpiuntiystPryeromf aEndeunctaStieocnretary

PREFACE

This Science textbook has been developed for bilingual learners based on
the B.E. 2560 (A.D. 2017) revised version of Thailand’s Basic Education Core
Curriculum B.E. 2551 (A.D. 2008). The content of this book goes along with
The Basic Science for Secondary 3 Book 1 written by The Institute of Academic
Development.
This textbook aims to enhance students’ skills needed in the 21st century,
which include analytical skill, problem solving skill, creativity, and collaboration
skill.
Each unit in this textbook provides vocabularies that are useful to learners
at the beginning of each unit. Examples that show students how to apply what
they have learnt to solve related problems. Followed by exercises that are
similar questions provided for immediate practice. At the end of each unit,
a summary of the key concepts and a revision exercise is provided to help
students consolidate what they have learnt.

Author,
Sarasas Affiliated Schools

March 2022



Chapter 1 Basic Units of Life WEEK 1-5

• Cells in Organisms WEEK 6-12
• Types of cells
• The Structures and Functions of Plant and Animal Cell

Chapter 2 Life Processes of Plants

• Transport of Substance in Plants
• Comparing Transport Structures of Monocotyledons and
Dicotyledons
• Photosynthesis
• Importance of Photosynthesis to Organisms and the
Environment
• Plant Reproduction
• Factors Affecting Plant Growth and Life Processes
• Plant Biotechnology

Chapter 3 Substances WEEK 14-19

• Properties of Substances WEEK 1-5
• Metals, Nonmetals, Metalloids
• Radioactive elements

Chapter 4 Classification of Substances

• Compound
• Classification of Substances
• Changes in Substances
• Pure Substances and Mixtures

Chapter 1 Basic Units of Life

Cells in Organisms
Type of cell

Chapter 1

Cells in Organisms Date: …./.…/….....

Cells in Organisms

Microscope
History

Types of Cells R..............................

SCIENCE LEARNERS MATERIALS GRADE 7 9

Chapter 1 Date: …./.…/….....

Cells in Organisms
Words to Learn

An individual animal,
Organisms plant, or single -

celled life form.

Unicellular An organism that
organisms consists of only one
cell.

Multicellular An organism that
organisms consists of two or
more cells.

The smallest, basic
unit of life that is
Cell responsible for all of

life’s processes.

Living things Things that are now or
once were alive.

Hands On!

tatuhhpneaiattrstwoCmafeeanllllwislfoeeorsa.gutralSedinnoitd,fshinemeifdpbtewowaneotsdhiuecewln,dectfreubcelneloudmtlotaahpmreboleenrcenveeaetnalkll,t.l Eccahoeanxpdlvnl,eclocefaruepennltltscdhintreei-oedfcinlnaeesitptlelitodonhnfot,doteccecseesellctlloslrsl.siptk.rntuTioochwnteusorweefh,aantyltlopittsheeaess

10 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

Cell Definition Cells in Organisms

akbbcatblinihknlnyaeyldeCE“eotdisAooenaaewipfcpgpcclrncllmlesbshiyouafe.netiatnesoolaed’lcsimmslpAtrioneeieotslbpghaslnalfrrt,icestdclharolincmeyefeaencbeu.olflle,euiscntsn.shieltcltweeuHdsarAavaudineihiteeclnnncsisiirntscsgaaots.auc”hcsrrlbreapeeiabdol,tpsroilheissf,pflocelisucfoamktueahieannssdnnolentsdmlecotlyciebctlfaiiliclnpoaolililevitlusfilensatdilelfneehesaeor.sgddeetllsr.f,, uMoaavtcrcheannnfyeoeDDmtrddldsoliriioaeecossoptuforrircchruleksgasgvooennataseaavvslccbmnireennfete,leiirreeds.o.yycclmnpallIeeoeitsdrfsoselflollhvfsuCcoaaaeilnefrcaernhlepeserlaccelssslmeelslspebsumlutlasersssi.udetinpstcnTeheketcthernunsouaelworpdnpirenwareeessyoyttddhirt.nfouhceigucfcnaafsettiluttoellehhalrtulsddoeeelt,l

Small chambers observed under the microscope

Discovery of the Basic Unit of Living Things.

HN mnthuooiecmowmrkobae“sedAccraoeoyBoblplsfsrsei”tseiwsmwhrvheehaeislmclkcchncaioeohdmrnwakeetmisaattbitnhsnensaderuatsmsem.caspeHewtsyluelsanrRocdolwoaaebmlrerlegersrdaeet. tdThheeeafrdiersfcoterplelse,,rsHleooanovkwinehgowonnaalsympreeladcnotthgceneiczlleewdllalalss.

SCIENCE LEARNERS MATERIALS GRADE 7 11

Chapter 1

Who discovered cells? w(sbcTatct scfEosfmbo sbC noccouhhummihtueenrrehofervouaaenruneengggaeuldllemmlucdidlsgalllllcccaaalssssdprcfylstyoilltophbtttyefnnn...cleiiteiihCCAferncoouoeoreiieiogpmlsesssTiscilegnneerdnarrlnklaramaetlheeaoalssflloee.mevlollnitori.eussnlyrrbnvniskneelfiotsgrbayiltstTidnolt(ntagrdotonocasdurmttvhosaraBihcecsecnmcn)eahetwaeriostn.ahkiionlaeekihrzoalnnacrnisstsyuemrlssheegilMpleyertse.opemersypacooepcrnolcvgupyl.graHenorufbsousofreeceociegiysllritmlmtefsrluoshodustarhafrala.tyausoefoimcmwaptripelpowenntrr.l)rmesallleee,arndmlia,iaiphbesmfllfrCsortialenessoyrmvusxtsemtsterhdemseoiisaddinfpl.osemltmzevdaoplaagaiserfeehtsdTritloeakashnneconmsrdcuahesecctnaaebdgvovt,eaopvipe.neitfyrleeasuarhreifpvueyenseFbiel.irnlceaafrtnopicisrrrhoOseotcerltatottetogfeieehhhhedtfuelruooooomnmtisslddaeeeeeciyysslrrffffft..l

hocio“ hHtfhmSchs pfHnnfa rHomct wsihouheartfbooeeitoaeocreeoormiasnraheselncundtlmmomsirwotlgupvtdeecscweuaec-ntfkiellpprdeneeitaltunoiiostletriaiaAIRLhemnln,v.uslovivonmnnoecuf”lfcmsaesis1ohatieeruutoncifdulcheeetitsd6cbsmdregainneebgtEclaan,.neebfim6oLmeCd1bddodhrrsevetttnheo5oneirot8antelelamoeOdohtAmeosisltnt.mcemfs8lsrthmnlnlavetcthllwvnitlRuar3atcHeuti.enciiiuueoaetituBocwnssbsci,ogrcridomiinoonecltsostafoertielcborindesnTeoaosgmooioesttoolseetleet,uleintehdlnlRsk.nyftmchsosnpvlVilrbrhsitcieopl,ces“oacoseetgtmtsheoacsooaorof,artbnopsHueyoruh.oanrefsap(tydeype.iinolcinmaotvfisbcoklioettctxCiitcrfecdmRLohmihshtdtoecreetdndhrouceoeceereiaokreu.a,sseieetskmlthwltbnnoresetieblclahn”htlt,dlcBTiisteavariusitidenetdetirtusoclouoyheteeriuiw.haerdsislmttohcnrbr)reseqtrdnhrnsamheno.a.geeewetuchssuiueHdunhoosltnadinceilessannceAcnureoicstowwhntgtrenotivt,lneiddthaurtcosuvoeioteeehhttecmoitlaneereephhdkeuelllrreetoerenslyddddddaaaoeeeeeeeeyysskrrf..,,,

12 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

Types of cells

1. Unicellular organisms is made cell. They are also free-living and can
up only one cell. All the activities be found both in water and on land.
necessary for life such as eating, The examples of unicellular organisms
excretion, respiration, movement and are
reproduction happen inside this single

amebae yeasts diatoms

eeuglena paramecium bacteria

chlorella chlamydomonas

2. Multicellular organisms are All organ system are parts of the body of
made up of more than one cell and a living organisms. Animals and plants
this group of cells is called a tissue. belong to this group. The examples of
Many tissue make up an organ and multicellular organisms
many organs form an organ system.

SCIENCE LEARNERS MATERIALS GRADE 7 13

Chapter 1

Hydra Planaria

Earthworm Human

Plant /Fruit Animals

Coatbuttons

Brain Teasers
What is Hooke most famous for?

14 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

Activity Date: …./.…/….....

Directions : Read and answer the following questions.

Activity

Picture ROBERT HOOKE

Who is Robert Hooke? What did he discover?

What did the 2 main types of cells? Who did he come up with
the term cell?

SCIENCE LEARNERS MATERIALS GRADE 7 15

Chapter 1

Hands On! Date: …./.…/….....

Tools for seeing small objects

Tools are needed to magnify the small objects and tiny objects that
image and study the cell in detail, cannot be seen with the naked eye. It
and visualize its size, shape and has two convex lenses serving as an
components clearly are ; eyepiece or ocular lens and objective
1. Microscope; The light microscope lens. The images are seen upside
is used to enlarge the images of down

Microscope History • 1590 A.D Hans & Zacharias
Janssen make the first microscope
• 1000 A.D First use of lenses to by placing two lenses in a tube.
view Greek Roman writings.

16 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

• 1665 A.D Robert Hooke - first to microscope with one lens and is the
describe and use the phrase "cell" first to describe bacteria.
when observing a slice of cork using a • Victor Hugo once said: "Where
microscope power of 30X. the telescope ends, the microscope
• 1675 A.D. Anton van Leeuwenhoek begins. Which of the two has a grander
"father of microscopy' uses a simple view?"

stt2hhm.eeMailpaml aglalnemgitfteyeoirnosfg,fthgssemlmasaahsllall;noiisdnbs,ujeesaccenttssdto,sejlueinncwlehaerlgoraynes. What do YOU Think he meant?
HcItaodnwoneeovstenbr’,etitswceoaernnknwooitntzhottionhmye noinabktjoeeocdtmseuytehc.aht.

Do You Know!! Some organisms do not have a proper shape!
dmos•h risogaAtvaipmnenecioa.stenImtfbdoissarfmeawe,ihsdswiicnhohgoincnldehpeo-rcuenesyoole.lftespdtophsssepseeeucsdwiseoesapll-owpkdinrtoihoapwnetoonr

SCIENCE LEARNERS MATERIALS GRADE 7 17

Chapter 1

• A human body consists of millions of
cells. The biggest cell is an egg cell and
the smallest cell is a nerve cell ( neuron )
which is 40 times smaller than an egg cell.
• A micrometer is a unit of measurement
of length equal to 106 or 0.000001

Activity Date: …./.…/….....

Newspaper "e" Microscope Lab
Objective: To learn how to use a compound microscope

18 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

Hmtaaonniecsherwrewoelesps'rcspytoahowppeueehfropasllroleotliodpwtkehaisn.reeglikUltqeehsueoetetnesstatlhriidoips"neresea.i"pmnafdraroegtmdoe psloidseitiofna.cing the normal reading
3. Cover with a glass cover slip.
What You Do: Preparing the slide cstta4ore.oagdcvveUrueeotrrslhspeiesnsrlogui.pfnthwdaaeenanrtdtewertwhyoaeeattpctdcihheoreocvapeeessprdetghsore,elfipopwgfllaaaatnthcsedeesr
1o.f nCeuwt sopuat paeler.tter "e" from a section
2. Place it in the center of a glass

Brain Teasers 19

This item helps you see things Too small for the naked eye Just insert
them on a slide?

SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

Characteristics of Cells Date: …./.…/….....

Words to Learn

Picture Word Meaning Thai Meaning
Characteristic typpiecraslootnhf,ianpglpa.acreti,courlar

Hypothesis pafruosmorfapatalhiosdmseusetriaeptieordnptdnivoneestegxhsivptetpiiioldgaobneanianntoasitcortiifsenoo.nr

Substance ma aptatpertrriocwpuieltahrrtiueknsini.fdoromf

Quality demogstehtosirhmaeeofeseimslsruaootetrarmheftnkhideenidinxntgaahcdgsgrie;ndaoaltglhiefson.eanfsct e

Conclusion theeveenndt oorr fpinroischeossf .an

20 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

Hands On!

Characteristics of Cells • i-aafssodLEMnobuerpiynrrgoitlretsphedvotaushocecriocivnnosegttpihacidinpovsneollegamearioofninlasitlrc.fieedgommtaatesrrhnagninoiadcelnodoytl,eiegcfctcltraeleahsreauotsloelnili.oletsredsructnseimaonnestcuigaw.lacilntbnbiiuaonldtylennluhyttssmeehprymemdevrnosietmtpachmtlioeeaonfbnsstotpeessirrtslrahriainitbinanhneygallgeeesisr,l

ch••F••a orcdsrtgmTECThleaulyeihhvofeepecftrneeeeorlwmrltboserorpeyenioutbdlnprciancudniruergssatcdcyocltmnlleevietoaicienilod.udlfirs-nfnsaeobebthienrooanyms(tarufmndhotiasorandciruevarsgtdeciicjeodaoovtliepnulusnrnoaslraaliers:eorggrlimoranoaragrtoenu.gennawcusdeanmectlneohlsseeleeilrsulsssemgueaps)asdrbpieynnhroneaoarilttnntllndhfieotetadoeossr.l •
•

Picture of cells

Muscle cells Chicken egg cell Moss

Euglena Paramecium Guard cells

SCIENCE LEARNERS MATERIALS GRADE 7 21

Chapter 1

Yeasts Human cheek lining cell Human red blood cell

Human sperm cell Human nerve cell Hydra

Size and Shape of Cells Date: …./.…/….....
Words to Learn

Picture Word Meaning Thai Meaning
Micrometer
ttttoscuwhhmrairraocnenaktialngobnlfdagwaee.cusaaemgsrdseesod,scvistrotehehtnadabweenteacwtmwwoeoittesefahhaeyewasnrfuhrforiibcneiomtheyssr
Microscope susoceaebsamevljlenesdpc,rfaltoestolyrs,phpvosutiiiecrucnwaacadlnihlrlnyeimgdainmvastseliamtormrgyureinspnmsimefl.aeierannadlttll

22 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

Picture Word Meaning Thai Meaning
Shape/Form
Component csootmnhteeoounrse,eoxrtoesrronmaoluettlhininfeogr.mof,
lpaaragrteoprfaawrtmhooalrceh,einleeesmpoeerncvteiahloliycf leaa.
Magglnaisfysing piueffniinnnsriaegeanlaledtyr.frglrepadentmreodisnteatisemitlwh,exaadsaitgtthmatehmpai,ninrpteohgysdaps,nusicasdmcaunelelacdlsylhlafisnanaoednesrt

Hands On!

Sizes and Shapes of cells

• Why do living cells different in size Bacteria cell
aidnedass)hape? ( wait for students share Frog egg cell
A living organism can be made
cupellso.f Tohneey ccealnl oinrcruepasteo imn inlliuomnsbeorf, Red blood cell
grow, develop, and respond to
satnimducloi,mbpuotntehnetssmizaey, bfoermdi,ffefurnecntti.on
1. Size of cells : Different cells have
tdhifafet rceanntnsoiztebefrosmeetnhewsitmhatlhleestnaokneeds
eye such as bacteria , a human red
btoloboed sceeell.nSwomithetcheellsnaakreedbigeyeenosuugchh
as a frog egg cells, chicken egg cells.

SCIENCE LEARNERS MATERIALS GRADE 7 23

Chapter 1

2. Shape or Form of cells: Cells Red blood cell White blood cell
in unicellular and multicellular
organisms have many shapes Cheek cell Chicken egg cell
and characteristics depending
on their functions. For example,
red blood cells, white blood
cells, chicken egg cells and
cheek linking cells are a
rounded shape.

m3eu.ogFvlueenncast,uiocanhnsd:apsSaormsapmeeercmceiullsmce.clalsn,

Euglena Sperm cell

Paramecium Red blood cell

24 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

4. Components : Cells without a
nucleus are human red blood cells.
Cells containing chlorophyll are
euglena and plant cells.

Let’s answer the questions

1. What is the shape of the cell? 3. What cell has no shape?
__________A_____n_____s_____._______________________________________________________________________________________________________________________________________________________________________ __A________n_____s_____:_____________________________________________________________________________________________________________________________________________________________________________
s2i.zWesh?y are cells different shapes and 4. Which is the largest cell?
_A_________n_____s_____.______________________________________________________________________________________________________________________________________________________________________________ ___A___n___s___:___________________________________________________________________________________________________________________
h5u. mWahnicbhodisy?the shortest cell in a
_A_____n___s___:___________________________________________________________________________________________________________________

SCIENCE LEARNERS MATERIALS GRADE 7 25

Chapter 1

PThlaentSatrnudctAurneims aalnsdCFeullnsctions of Date: …./.…/….....

Words to Learn

Picture Word Meaning Thai Meaning

Cytoplasm wthietthhneinumcalealiutvesinr.igalcoerllp, reoxtcolpuldaisnmg

Mitochondrion Ilpeitinnathnrwreaohgencaawreignersdhnsyniastecouoerhrmgfdspolbaaorrootenymuhfderebesrlurlaelleeciysbntbepiemormiiiorsfnneaocog(mtuchsionretbfoinodsmccrltadaeacincenleuleiasdd)rn..,,l

Enrdetoicpulalusmmic oapwtItutfribtotaaahutcueelnehsuitnheuseketadaawwlnrloyyndiartouhkntlciiidpnchloeiacdfatisehsrmslely,meincnrcmitovebhyonmbtoeoltrvssibnapeoisrunldaam.oonsuuemeinsss.

memCberllane mcyetthomepblarasnmeossfuearmrocipueenll.rdminegatbhlee
ofa mRiNnuAte paanrdticleacsosnosciisattinegd
mnopfureomstleisbvieneinnsrgsgericfnoeullntshd.eRNTcAhinyetyopllabaarisgnnmdde
Ribosomes

26 SCIENCE LEARNERS MATERIALS GRAptrDaonElysp7feerptiRdNesAantod psryontethiness.ize

Chapter 1

Hands On!

The Structures and Functions of Plant and Animals Cells

Cells of different types have their three basic structures, the cell
different sizes, shapes, and functions. membrane, cytoplasm, and nucleus
Each cell contains a large number function the same but some detail are
of tiny structures for life activities but different.

Basic structures of a cell

a1afsorun.rsogbdmapsCmnrtvayoeaatntlorelnceipoiyneslua,cisfnshlcomsceaaiedmrtlbeliioacnthhcai.syetlidvcIcaitroteaimecltlesjoepw,nilonilttyaauhs-ninilndtidkhdseeeswowosfafatulhtusthceetideehrr Tcfolofehatellhtmecineyc.tmyotpboplraalsanmsemeisxthctaehtpeatlflowthraettheoerrynguapcnoleretliuloesns.

SCIENCE LEARNERS MATERIALS GRADE 7 27

Chapter 1

plcsliyonpelicanilnlacygusdthlea1rledaor.a1tmoinfarirasgbAoirtaedliiedgnrecssheeaitilnnnlnfeatriromncftioohmgeaulellelelncdeddteioavielsilcnisvsthh.eiapoIeltaonosciop.retyhtmwphlieneiaetrdhrrnaraatoitcnnenoadddefl

nipmi simannnyudreaonstmdhsdtitzesthsebehei1eaneeuc.sgoa.r2poisfensuRopdctrroneiyrsobaotestcnooshteecuspsoerioumuvnlfaemremdessnade.emrednocssiod,nuIoptaasdtRlrnhaweiimnNsesihmfgmAiogellupaitireochaenonnenrdrocetdaDgmoitpnincmeawretlunolahtppolteirunielgacnetmtiirhencosxt

o epmoeeTtnsnhfrhaoseddtedtheooereenppi1necll.eiaan3eumfuossd,ppmmklEodaotnpiiiohccnrrdlyfteagaoroser.npttemwiItttcltirtacaioiiccssucnfuumlesauslnupluirmlccte,moybt.tpiraiu,rotcenaennuatdtisioiltcnousfudhnmoslau–russgmscmiyarsmhosn,o(utaEeeoganRlmtliehhnsy) aahdnsoesrdtomomxcoTiiefnahicteteaeabdtpioorwslnoismidtfmhuounoaclicptnthitoididonsn.(tfE.eaRrtoI)timdaipaslsnrooudflaahucracgtstuieorleany
ap wribnriotdohdsduoTmicmshtpiieelolaisnot,c,nhsrfiooosufoldgsfiohninmgmv,eoelmvpEqerRbuodr,ataelinitnyewssi.tthcubodonduttenhroddel

28 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

t rhoeun“dp1ot.o4weMrhitooucsheosndorfiothneisceklln,”owitnisaas energy for the cell is known as ATP.
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SCIENCE LEARNERS MATERIALS GRADE 7 29

Chapter 1

Activity Date: …./.…/….....

Plant Cell Model Project
1. Make a group of 4
2. Design and fabricate a 3D plant cell model from any materials and
3. Preparing for presentation next week.

My Design

30 SCIENCE LEARNERS MATERIALS GRADE 7

Hands On! Chapter 1

isl Autastpnyredseonhrfga1othctp.th6haeeeetl.lnureIAstlnocitcsschoeleeofmo,lslcupleiewngosldnluatainlhnlinnde,dsippsc.hleaeeacnlll.AptttinhIsct,iecmcispleklasrlmloionotauwetnadtilaenyienlr.,l Date: …./.…/….....

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SCIENCE LEARNERS MATERIALS GRADE 7 31

Chapter 1

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wasIbwonhstaaahalstaaepeptnnrerieg1ic.mo.mea1ragan0elandancndntseedAo,lllltmsehiogv,seona.erirtsIcetnt,usipnpouslgtallburaeyagsnnrtatriasdocrinpsleecaaloslenrIsfesd,intnihstttesoowtslxotuahusirbntacaeelsenhcsr.

32 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

Activity Date: …./.…/….....

3D Animal Cell Model
1. Make a group of 4
2. Design and fabricate a 3D animal cells model from any materials
3. Preparing for presentation next week.

SCIENCE LEARNERS MATERIALS GRADE 7 33

Chapter 1

Activity Date: …./.…/….....

Comparison between Plant cells and animal cells
Directions : Study the following pictures of a plant cell and animal cell.

In what ways are both cells similar and different?

.Comparisons of a plant cell and an animal cell

34 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

Unit Review : Basic Units of Life Date: …./.…/….....

Directions : Fill in the words in the crossword grid.

SCIENCE LEARNERS MATERIALS GRADE 7 35

Chapter 1

Unit Review : Basic Units of Life Date: …./.…/….....

Directions: Choose the correct answer for each question.

1. Which of the following is not a basic structure of the cell?

a. Nucleus b. Cell membrane

c. Cytoplasm d. Genetic material

2. Which of the following cells are able to move themselves?

a. Egg cells b. Sperm cells

c. Nerve cells d. Red blood cells

3. Which of the following living organisms differ from the others?

a. Hydras b. Amebae

c. Euglena d. Paramecia

4. Which of the following living organisms differ from the others?

a. Algae and hydras b. Planarian and yeasts

c. Amebae and chlorella d. Euglena and jellyfish

5. Which of the following cell organelles are found in plant cells only?

a. Nuclei b. Centrioles

c. Chloroplasts d. Mitochondria

6. Which of the following structures of plant cells enable them to produce their own food?

a. Cell walls b. Vacuoles

c. Chloroplasts d. Mitochondria

7. To study the cell walls of an organism, which of the following organisms should
be examined?

a. Moss b. Sea anemone

c. Coral d. Plasmodium

36 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

8. Which of the following structures are used to distinguish rough ER from smooth ER?
a. Lysosomes b. Chromatins c. Ribosomes d. Nucleolus
9. Which of the following cells can live without nuclei?
a. Sperm cells b. Nerve cells
c. White blood cells d. Red blood cells
10. A cell wall is mainly composed of which substance?
a. Chitin b. Cutin
c. Pectin d. Cellulose
11. Which characteristic of living things can be viewed using a microscope?
a. Living things grow. b. Living things adapt to their surroundings.
c. Living things use energy. d. Living things are made of cells.
12. You shine a flashlight in your friend's eye and observe the pupil constrict.
Which characteristic of living things have you observed?
a. Living things are made of cells.
b. Living things reproduce.
c. Living things respond to stimuli in the environment.
d. Living things grow and develop.
13. Life’s basic unit of structure and function is the_____.
a. gene b. cell c. organism d. species
14. Which list represents the levels of organization in a multicellular organism from
the simplest level to the most complex level?
a. tissue, cell, organ system b. organ system, organ, tissue, cell
c. organ, tissue, organ system d. cell, tissue, organ, organ system
15. Which of the following are not found in plant cells?
a. Mitochondria b. Glyoxysomes
c. Centrosomes d. Golgi apparatus

SCIENCE LEARNERS MATERIALS GRADE 7 37

Chapter 1

16. The overall shape of a bacterial cell is determined by which of the following?
a. Cytoskeleton b. Cell wall
c. Cell surface membrane d. Nucleoid

17. What are the tiny cell organs that produce protein?
a. Smooth ER b. Ribosomes c. Lysosomes d. Rough ER

18. The internal parts of a cell are suspended in a jelly-like liquid called the_____
a. Centrioles. b. Golgi apparatus. c. Cytoplasm. d. Mitochondria

19. Why does a plant cell have a fixed shape and an animal cell does not?
a. Plant cells have larger vacuoles than animal cells.
b. The process of photosynthesis causes plant cells to have a rigid shape.
c. The cell membrane of a plant cell is surrounded by a cell wall.
d. Plant cells have to make a photosynthesis.

20. Which structure is only found in animal cells?
a. Pinocytotic vesicle. b. Golgi apparatus.
c. Nucleolus. d. Chlorophyll

____ / 20

Date: …./.…/….....
Unit Review : Basic Units of Life

Directions : Make a group of 4 to spark the CSI Identification Examining
Cells Activity.

38 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 1

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12

3

4 5
Identifying Features
Items Type of cell
1 SCIENCE LEARNERS MATERIALS GRADE 7 39
2
3
4
5

Chapter 1

Grading Myself

Unsatisfactory Effort Needs Satisfactory Outstanding
Effort Improvement Effort Effort

(0 points) (1 points) (2 points) (3 points)

I contributed to the
team work.
I exhibited scientific
thinking.
I maintained a
positive attitude.
I completed the
building task.
I reflected on my
work.

Grading My Team

Unsatisfactory Effort Needs Satisfactory Outstanding
Effort Improvement Effort Effort

(0 points) (1 points) (2 points) (3 points)

Mtoygetethaemr.worked well
My team displayed
problem-solving skills.
Mpoystietivaemahttaitdudae.
tMhye tbeuaimldicnogmtapslek.ted
awMnoydrkter.eafmlecdtiesdcuosnseodur

40 SCIENCE LEARNERS MATERIALS GRADE 7

LifePPlraocnestsse.s of Chapter 2

Vascular System
Transport Structures

Chapter 2 Date: …./.…/….....

Cells in Organisms

42 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 2

Date: …./.…/….....

haJvuestmliakneyapllrloivcinegsstheisn.gFso,rPelaxnatmspalles;o • PPllaannttss feceadrr.y out photosynthesis,
• Plants reproduce. •
• Plants grow. Transpiration, Translocation and more.

2.Transport of Substances in Plants.

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Words to Learn

Picture Word Meaning Thai meaning

Plant

cell

nutrients

Vascular

roots
SCIENCE LEARNERS MATERIALS GRADE 7 43

Chapter 2

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Root Root Hair

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44 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 2

Activity Date: …./.…/….....

Direction : Read and answer the following questions.

1. Why is transport of materials necessary in a plant? Explain.
Ans. _________________________________________________________________
_____________________________________________________________________
2. What kind of transport system is present in plants?
Ans. ________________________________________________________________
_____________________________________________________________________
3. Root hair are almost importance to the plant because.
Ans. ________________________________________________________________
_____________________________________________________________________
4. Plants absorb water and mineral by.
Ans. _________________________________________________________________
5. Create a tree diagram craft that consists stem/ trunk , root , leaves , flowers
, fruits , branches , and explain why different part of a plant need water.

Word bank: Leaf needs water in order for
flowers, support , food , them to make _____________

anchor

n_d_eo_en_d’t_sd_w_ro_ap_t_eo_rr_s_wo_itl_ht._a_t_t_h_e_y Stem needs water to ____________
the plant in the soil.
Root needs water to ____________
the plant’s leaves, flowers, and
fruits.

Brain Teasers 45

The plants may have pipes to transport water to the entire plant like we
have in our homes for the supply of water.

SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 2

2.1 Structures of the Vascular System Date: …./.…/….....

Words to Learn

Picture Word Meaning Thai meaning
Xylem apanladtynpsrtosoeomtohtsefatttniosturstathurnieeesnlpientosavrvtfasreosswcm.ualttaherer

A living tissue, responsible
Phloem footrhterarnosrpgoarntiincgmfaotoedriaalnsd.
Vascular tissue antrdaTnfohsoopdsoertottwisdasifutfeeerrs,emnwtihnpiecarhratslsof

a plant,

Cylindrical In the shcaypliendoer rform of a
Sieve cell wfpeirrtAhinmsnsitiaaeivsnrvreidoeetvwgyeepylpempeomlnrapeeotrenses.tspaoeenfnrdmat nisno,

46 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 2

Hands On!

• Plants use vascular tissues
tthoattrcaonnspsiosrtt owf axtyeler manadndnpuhtrlioeenmts
(substances).

xylem. Phloem.
• Transports water and mineral from • Transports photosynthesis
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• •
•
•
•

SCIENCE LEARNERS MATERIALS GRADE 7 47

Chapter 2

Hands On Activity Date: …./.…/….....

Vascular tissue

Objective : To study the vascular tissue in plants.

Problem : What do plants use to transport water and minerals to other

parts of the plant.

Hypothesis : _______________________________

Materials :

1.Microscope 6.Water glass
2.Slide 7.Petri dishes
3.Cover slip 8.Celery plant or
4.Food colouring
5.Water Cabbage

Instructions :

1or. cParebpbaargeethe vegetable such as celery plant

2st.irDwroepll.foTohde cwoaloterrinsghoinutoldbbeeakeevresnolyf wcoaltoerreadn.d

48 SCIENCE LEARNERS MATERIALS GRADE 7

Chapter 2

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Record/ Observation :

Picture here

Summary/ Conclusion :

Questions :

1. Why are the results of the experiment important?

SCIENCE LEARNERS MATERIALS GRADE 7 49