Download - Photosynthesis and Respiration in plants
-
8/16/2019 Photosynthesis and Respiration in plants
1/18
ScienceIndicator 1 and 2 – Second Term, 2016
Seventh gradeBoston International School
-
8/16/2019 Photosynthesis and Respiration in plants
2/18
What do plants eat?• Objective :To recognize that
altho gh in a di!erent "a#, theprocess o$ $eeding not onl# occ rs inh mans and animals, % t also inplants&
• Learning Objective: '(plains ho"the plants meet %asic $ nctions o$living things&
-
8/16/2019 Photosynthesis and Respiration in plants
3/18
Biblical Principle• God supplies our basic needs.• Genesis 9:33
'ver# moving thing that lives shall %e$ood $or #o & I have given #o allthings, even as the green her%s&
-
8/16/2019 Photosynthesis and Respiration in plants
4/18
What do plants eat?
• )lants ma*e their o"n $ood – in the$orm o$ s gars – sing "ater, car%ondio(ide, and s nlight&
• So "hat is the +$ood that people addto plants? It-s $ertilizer&
• .ertilizer is a mi(t re o$ minerals, s chas potassi m, calci m,and phosphor s&It helps plants to gro", % t doesn-ts ppl# them "ith energ# as $ood does&
-
8/16/2019 Photosynthesis and Respiration in plants
5/18
)hotos#nthesis• It is the process %# "hich a cell
capt res energ# in s nlight and sesit to ma*e $ood&
• )lants ma*e their o"n $ood thro ghthe process o$ photos#nthesis&
• /n organism that ma*es its o"n $oodis called a prod cer or anautotroph. /n organism that cannotma*e their o"n $ood is called acons mer, or a heterotroph.
-
8/16/2019 Photosynthesis and Respiration in plants
6/18
What happens d ringphotos#nthesis?
• ring photos#nthesis plants a%sor%energ# $rom the s n and se it toconvert car%on dio(ide and "aterinto s gars and o(#gen&
• The photos#nthesis has t"o stages:.irst, plants capt re the s n-s energ#&Second, plants prod ce s gars&
-
8/16/2019 Photosynthesis and Respiration in plants
7/18
Stage 1: apt ring the S n-senerg#&
• This process occ rs mostl# in the leaves&ecall that chloroplasts are green
organelles inside plants cells& The green
color comes $rom pigments, coloredchemical compo nds that a%sor% light&
The main pigment $or photos#nthesis inchloroplasts is chloroph#ll&
• So chloroph#ll capt res light energ# andconverts it to a $orm that is sed in thesecond stage&
-
8/16/2019 Photosynthesis and Respiration in plants
8/18
• ring stage 1, "ater in thechloroplasts is split into h#drogenand o(#gen& The o(#gen is given o!as a "aste prod ct&
-
8/16/2019 Photosynthesis and Respiration in plants
9/18
hloroplast
-
8/16/2019 Photosynthesis and Respiration in plants
10/18
Stage 2: 3sing energ# toma*e $ood
• In this stage cells prod ce s gars&ells se h#drogen 45 that came
$rom splitting o$ "ater in stage 1,car%on dio(ide $rom the air, and theenerg# $rom the s n to ma*e s gars,one o$ them is 7l cose&
• ells se the energ# in gl cose tocarr# o t vital cells $ nctions&
-
8/16/2019 Photosynthesis and Respiration in plants
11/18
-
8/16/2019 Photosynthesis and Respiration in plants
12/18
What happens to the s garsprod ced in photos#nthesis?
• )lants cells se some o$ the s gars $or $ood& The cells %rea* do"n these molec les in aprocess that releases energ#& This energ#
can then %e sed to carr# o t the plants$ nctions s ch as gro"ing and ma*ing seeds&• 8ther s gar molec les ma# %e stored in the
plant-s cells $or later se& When #o are
eating $ood $rom plants, s ch as potatoes orcarrots, #o are eating the plant-s storedenerg#&
-
8/16/2019 Photosynthesis and Respiration in plants
13/18
• St d# $or iz: ;a# th
Bl e• ;a# 11th 12th 4>th ed
-
8/16/2019 Photosynthesis and Respiration in plants
14/18
espiration in plants• )lant cells respire – the# give o t
car%on dio(ide and a%sor% o(#gen$rom the air that s rro nds them&
• Their tiss es respire = st as animaltiss es do& )lants, ho"ever, don-thave l ngs or a %lood stream, so "ecannot sa# the# %reathe in the same"a# as animals&
-
8/16/2019 Photosynthesis and Respiration in plants
15/18
• )hotos#nthesis does the opposite o$respiration& ar%on dio(ide is a%sor%edand o(#gen is prod ced&
• /ll the parts o$ the plant respire, theleaves, the stem, roots, and the @o"ers&
The parts a%ove the soil get their o(#gendirectl# $rom the air thro gh pores& Thepores in the leaves are called stomata 4sing lar: stoma & The pores in the%ranches are called lenticels &
-
8/16/2019 Photosynthesis and Respiration in plants
16/18
/ plant respires all the time, da# andnight, % t photos#nthesizes onl# inthe presence o$ s nlight&
In respiration, plants convert thes gars %ac* into energ# $or gro"thand other li$e processes and releaseenerg#, car%on dio(ide, and "ater&
-
8/16/2019 Photosynthesis and Respiration in plants
17/18
https:AA"""o t %e&comA"atch?v Ilmg.Cm%/3g
https://www.youtube.com/watch?v=IlmgFYmbAUghttps://www.youtube.com/watch?v=IlmgFYmbAUg
-
8/16/2019 Photosynthesis and Respiration in plants
18/18