Name
Cell Processes and
Energy
'
Section Summary
{
PhotosYnthesis
Key GoncePts
they need?
things with the energy
living
supply
sun
the
How does
the process of photosynthesis?
What happens during
need energy
for most living things.-Allcells the energy
energy
of
source
The sun is the
Cv *titn a-cell captures
t("p'otJ*
their
out
to carrY
ffod i"uf"a photosvnthesis'
'littioo''
in suniight and
r
r
us[;;;J;
I
,!
i'
,o"T;"rH,*Hr***;*,"ry1rq1rit''#ffi
own tooo#Iiill,;:['*:"
the sun to'make their
an
srass, use energy-i'8*
is called
thi:;"k"; its own foodis called a
ol;#.S;
6f ,hotorv"tr1"'i'l'il''
i" own food
'
e" o'*"ti'*?nut tu"rroi*'ft"
other orgarusms'
auiotroph'
fooaUy eating
Mrf;T:i#;*
heterotroph.
"brain
photoslmth"ririracomplexprocess.Duringphotosvnthesis'plants
ionvert carbon
or"
in
organisms
"r,"ffi;:$.::'o
and some other
Photosynthesis takes place
*JEi,gars.
oxyge,,
dioxide and waterinto
(a'31*"cing sugars' In
(1)
two stages'
J;;;Jt#'g:F;?hd
l?I"ffi '*rhe
01p,,,+',t*rfi:tit?*l;;:it;fu:rxtl,*'ffi
rn
that abiorb light'
chloroPlasts
comes r,o* pig;;o;;;;fi;"d^'h+;i-;fuounds
J is chlo'o phvll' Chlorophvll'
*
fi"""*:hi;t
;
"PI
main pr,o,o'v"'iilllt
*i",rieT+i#l*':::t?trJ,"Jffif
.,f
::+,"{*:iL"-'::H[:'"
sugi
ihe soil, and
1
to oroduce
H;o)
curbl.rirli"ii"
",,d
the water,n.^
il"i",
from
tco, il;.;;"t* "i*+.llater
the plant.
enters
dioiide
"p1"
u-",r";;;;.E;;on
ih,o,gh,q$."t"r;hT-fl*i;i***:tffi';#:ft
the water and caroo:
:::"TflT,'T*
l'^:l:..i.].;,
i",nJt"u"es,
plex
Insidethechloroplasts,thewaterand.carbondioxideundergoacom
seriesofchemi^Jr"!.tionsurrap.Jrrcetwoimportantproductsof
photosy,nth#;;;;;:"..y-t{ililjim:*-n:t:Xfiti:.
'nf'"i:l6ir"##xli3h:H}?i1';;a*:"',T1':;*"stallorth-eoxvgen
[ving thinqs through photosynthesis '
J;;;t"Piy the f;flowing chemical
was prodrr."d 6y
in Earth, s atm;sphere
The events of photosynthesis
;=;"
equation:
light energy
6COz +
carbon d'ioxide
6H2O
water
6oz
a sugar
oxygen
j
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lu
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Name
Date
Getl Processes and
)
{
I
Energy
Photosynthesis
.
(pp,
Class
Guided Reading and Study
.4q4s)
This sectian explains hotw plants make food by using the energy
from sunlight.
Use Target Reading Skills
As you read, c-reate afloa:chart that shouts the steps in photosynthesis. put each stE
in a separate box in the flowchart in the order in which it ociurs.
Steps in Photosynthesis
Sunlight strikes leaf.
Chlorophyll captures light energy.
f'
[.-
)
!l
Sources of Energy (p. 45)
1.
L-
i'
Lr the process of photosynthesis, plants use the energy in
to make food.
I
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fr,:.
.q4'
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Peorson Edurotion, lnc., publishing os Peorson prentice Holl. Arr rights reserved.
L1L
Date
Name
Gel processes and Energy
PhotosYnthesis
2.
.
Guidb'd Reading and Study
r
(cantinued)
Complete the following table about how living things use the sun's energy.
How Living Things Obtain Energy From the Sun
Living Thing
Autotroph or HeterotroPh?
Obtains Energy From the Sun
Directly or Indirectly?
Grass
Zebra
Lion
The T\ro Stages of Photosynthesis (pp'46-48)
3.
List the two stages in the Process of photosynthesis'
a.
i
,l
4.
The green pigment in chloroplasts, called
energy from the sun-
5.
Is the
6.
What are stomata?
absorbs light
following sentence true or false? Besides the energJ in sunlight, the cell.needs
water and carbon dioxide to make sugar'
(
@
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112
Name
Date
Cell processes and Energy
7.
Circle the letter of each
.
Guided Reading and Study
proiuct of photoslmthesis.
a. water
b. carbon dioxide
c. oxygen
d. sugars
8'
Ir1$ff:*"ffi?iil.:#:#::i*il"tto
to svmthesis pr oduces
the carb on dioxid e
The Photosynthesis Equation
9'
Write the chemical equation for
the process of photosynthesis.
L0'
\Arhat
.
word does the arrow in the chemicar
equation stand for?
L1' Circie the refter of each raw
materiar of photosynthesis.
a. carbon dioxide
b. glucose
e. water
d. oxygen
-l
L2. Circre the retter of each sentence
that is .,ue about the products
of
photosynthesis.
a. plant ce]Is ssu the sugar
for food.
b' some o{
sugar is irade into other compounds,
T"
such as cellulose.
c' some of the
sugar is stored r"
for rater use.
d. Extra sugar morecures
pu*
th;;i;;#I;,
o"io,fi;;*;,ffign'*JJ;*"o
.1.
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ii
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',t:
,:i:
lll
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lr-
CIass
Date
Name
Cell Processes and EnergY
,
Review and Reinforce
{
PhotosYnthesis
Understanding Main ldeas
of
withthenatnes
-themissing
Fitlintheblanks in thephotosynthesis equationbelow
the spaces proaided'
in
that
tl'iquestions
onii*
fottow
Then
,ii*i,p,Arnar.
.n
1.
sunlight
<
5---i'-
5. \Alhat are the raw materials of photosynthesis?
5.
\Atrhat are the
products of photoslmthesis?
7.V[hyissunlightwrittenabovethearrowintheequation,ratherthanon
either side of it?
8.
Where does PhotosYnthesis occur?
Building Vocabulary
Fitt in theblank to complete each.s.tatement'
sunlight and trses it tci make
The process by which a cell.captures the "r,.,gy'ih
food is
are colored chemical compounds that absorb iight'
of plants is
11. The main pigment found in the chloroplasts
g.
1n
called
:
are small openings on the undersides of leaves
tflro"gh *hich carbon dioxide enters a plant'
a(n)
L3. An organism that makes its own food is
is an organism that cannot make its own food'
14. A(n)
72.
h ,-r:-- U-ll rll -:^LL.^"^-,^J
Name
I;
Date
Gell Processes and
Energy
)
.
Enriih
Ghlorophylt and the,Gblor
of Light
Apigmentis a co,
:ffi}:"ifrff ffiff tx';l,r:;,,:3il;J};il,,F
#ii*"#h"#[{fi
:',',tii:11[,1ffi ::,T:,_iT*:ni#?ini:i",l'":ea1,he.",:;.;:
..tl a f y ;#
;,,'#Hff ,r"ii:::l,ff;
!
100
Percent of Visibte
Light Reflected by
Chtorophyil
AJ
90
AJ
EqJ
80
s
70
e
a
's
50-
o
403A-
qJ
LJ
20-
a.l
t0
a.
I
60.
-
Answer thefoiloaing
questions on a se
',H't',?'#rqi;6;,;#:;;;!::.';,.;*n;0"..*,.r
chlTonhfll
reflect?
z' I^rhich
--Yvr' { l
coror 'Iight does
chloroohy-ll absorb
of Iight of this"i:,:3":
About whatpercent
aout .hto-rohyu
3. The colors ,hurtolot
"url.Li*rvDL:
less than 50%
,r',"
conkibute
r"";;;31u,*flected
r v hlQh colors
does your
"y"
most?.
"gr"Jr,;1ll?z
4. lfhich colors of Iight
5. Exprain in your
"y"
do you not
own words how
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Hofl. All,.gh,s reserued.