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8/13/2019 Lesson Plan Scientific Notation
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LESSON PLAN
School : ________________________
Course : Mathematics
Grade : VII (Seventh)
Semester : Odd Semester
Teacher : Nandra Cahya Praramadhani
A. Standard of Competence
! Solvin" #ro$lems involved e%#onential& root& and lo"arithmic 'orms!
B. Basic Competence
1.1. ##lyin" conce#ts and #ro#erties o' e%#onential& root& and lo"arithmic 'orms!
C. Indicators
1. Convertin" decimal num$ers into scienti'ic notation and vice versa!
2. ##lyin" al"e$raic o#eration o' some num$ers re#resented in scienti'ic notation!
D. Learning Objectives
1. Given a decimal num$ers& students are e%#ected to $e a$le to convert the num$er into scienti'ic notation!
2. Given a num$er re#resented in scienti'ic notation& students are e%#ected to $e a$le to convert the num$er into decimal
num$er!
3. Given some num$ers re#resented in scienti'ic notation& students are e%#ected to $e a$le to a##ly a##ro#iate al"e$raic
o#erations o' those num$ers!
1
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E. Prequisite Materias
1. Inde% notation
2. Pro#erties o' e%#onents
F. Learning Materias
1. Scienti'ic notation
2. The rule o' #oer o' *
G. !ime Aocation
+ ,- minutes ( meetin")
H. Learning Met"ods
a. .earnin" ##roach : In/uiry
b. .earnin" Methods : 0iscussion& Presentation& Individual e%#loration& Pair sharin"
I. #etai of Activities
!eac"er Activities E$pected Students Activities Note
OPENIN% &'( minutes)
Teacher "reets students!
Good morning, Class! How are you?
Im fine, an" you.
Students anser the teacher1s "reetin"!
Good morning, #aam$%ir! Im fine, an"
you. &nd you?
Teacher has students to #ray $e'ore startin" the
lesson!
The leader o' the class as2s her3his 'riend to #ray
to"ether!
2
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'", Class. (lease e )a*ain of e )lass,
lead your friends o *ray ogeer.
+efore we sar is lesson, les *ray
ogeer. (raying...
The other students #ray to"ether!
The leader o' the class as2s her3his 'riend to sto#
#rayin"!
inis.
The other students sto# #rayin" and #re#are 'or the
lesson!
Teacher chec2s students1 attendance!
&nyone absen oday?
Good. Im glad a all of you -oin is
)lass oday.
as a**ened wi %uden /?
', I o*e sell ge beer soon.
Students anser the teacher&
No, Maam/Sir.
Or
0es, #aam$%ir. %uden / is absen oday.
%e is si)", #aam
Teacher as2s students hether they1re ready to start
the lesson!
ell. &ll of you loo"s so a**y oday. %o,
I o*e a well ge a fun a)iiies oday.
&re you ready o sar, Guys?
Students anser the teacher1s /uestion!
Some students res#ond&
0es, #aam$%ir.
Teacher revies students students1 initial 2noled"e
related to e%#onential 'orm and its #ro#erties $y
Students revie their initial 2noled"e and anser the
teacher1s /uestions!
Appreception
3
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"ivin" some /uestions!
Guys, wo sill remember wa wee
dis)ussed in e *reious meeing?
a else?
Grea. o wans o menion wa e*ro*eries of indi)es are?
Teacher "ives #ermisson to students ho ants to try
anserin" the /uestion and as2 other students to #ay
attention to the student!
'f )ourse, you may. eryone, *lease
lisen o %uden +.
Some students res#ond&
Inde noaion, #aam$%ir.
The others res#ond&
(ro*eries of indi)es, #aam$%ir.
Student 4 raise his3her hand&
#ay I ry i, #aam$%ir?
Student 4 mentions the #ro#erties o' indices and the
other students #ay attention to his3her anser!
Student 4 may mention&
4e *ro*eries are
am a
n=am+n
am
: an=a
mn
5
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Teacher a##reciates student1s anser and as2s other
students 'or "ivin" a##lause!
Good -ob, %uden +. Guys, gie a big
and for %uden +.
Teacher as2s students a$out 5ero and ne"ative
inter"ers #oer!
How abou 6ero and negaie indi)es
*ower?
Teacher a##reciates student1s anser and as2s other
students 'or "ivin" a##lause!
Grea. Gie a**lause for %uden C.
a
(m)n=amn
( a b )n=an bn and
(a
b )n
=
an
bn, b *
The others students a##reciate Student 41s anser and
"ive a##lause 'or her3him!
Students C res#ond&
6 a*= and
an=
an & #aam$%ir.
The others students a##reciate Student C1s anser and
"ive a##lause 'or her3him!
7
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Teacher "ives illustration a$out needs o' sim#ler ay
in notatin" or calculatin" very lar"e or very small
num$ers!
Gien e *roon mass is
8.888888888888888888888819: gram.
(the num$er is shon in a slide or ritten in the
$oard)
Can you imagine ow diffi)ul o do
algebrai) o*eraions beween ese "ind
of numbers? Is ere any way o sim*lify
e *roblems? 4a is wy we need o
learn abou s)ienifi) noaion.
Students are e%#ected to $e curious a$out ho
e%#onential 'orm can $e used 'or solvin" daily li'e
#ro$lems and develo# their interest to learn more
a$out this to#ic!
Some students may res#ond the teacher&
How )ould i be? I am )urious abou a.
Motivation
MAIN AC!I*I!IES
E$poration &+( minutes)
Teacher dis#lays some e%am#les o' num$ers
re#resented in scienti'ic notation!
Students are curious a$out hat they ill do ith
these 2ind o' notation!
Individua
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;oo" a ese numbers dis*layed in e
slide.
a will we do wi ese numbers,
#aam$%ir?
E$poration
Teacher as2s students to o$serve the dis#layed
e%am#les and 'ind s#ecialties o' the notation
dis#layed individually!
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>o you find a e noaion uses a?
%o, i is '=. 0ou )an say li"e a. (lease
find e oer s*e)ialies.
0es, #aam$%ir.
'=, #aam$%ir. 4an" you...
Teacher as2s students to share their o#inion in #air
and discuss to com#lete their anser a$out the
s#ecialties o' notation in the dis#layed e%am#les!
Hae you finised, #aam$%ir?
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4ime is u*, Guys. I will inie a *air o
*resen e dis)ussion resul in fron of
e )lass. or e oers, *lease )om*are
your dis)ussion resul o e *reseners
resul. 0ou sould )rii)i6e or )ommens
e *reseners resul.
o wans o be e *resener?
Grea. (lease wel)ome, %udens & and
+... Gie a**lause o em.
'=, #aam$%ir.
Pair (Students and 4) ants to $e the #resenter
"rou#& 6'ur grou*, #aam$%ir.
Other students "ive a##lause to Students and 4!
&!"e Presentation of Pair A)
ell, Guys. Good morning. In is
o))asion, + and I will *resen our dis)ussion
resul abou e s*e)ialies of noaion in
e eam*les dis*layed. In our o*inion, is
inoles 10 o e *ower of an ineger, a
)an be *osiie or negaie. 4en, is is
muli*lied by a real numbers beween 8
and 1. 4as all.
The other students res#ond&
A
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Teacher as2s the audience hether they have
di''erent o#inion!
&ll of you, do you agree wi & and +?
&ny oer o*inion?
0es, #aam$%ir.
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Bery good answer, %uden >. %o, ese
"ind of noaion is )alled s)ienifi)
noaion. ell dis)uss i more now.
Some students res#ond&' I see, #aam$%ir.
Eaboration &,( minutes)
Teacher divides class into several "rou#s o' 'our!
ell, Guys. Im sure a you ae go
e iniial "nowledge abou s)ienifi)
noaion. 4o )om*lee your "nowledge, I
wan you o wor" in grou* of four. (lease
)oun 1 u* o 9, Guys.
'=, %udens wo said 1 *lease gaer
ere. %udens wo said 2 *lease gaer
ere. %udens wo said 3 *lease gaer
ere. %udens wo said 5 *lease gaer
ere. %udens wo said 7 *lease gaer
oer ere. &nd sudens wo said 9 *lease
gaer oer ere.
Students "ather ith their "rou#!
1, 2, 3, 5, 7, 9 ...
'=, #aam$%ir.
0es, we ae, #aam$%ir.
See ttachment +:
-or.s"eet
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Hae you me your grou*, Guys?
Teacher distri$utes -or.s"eet 'or each "rou#s
containin" an ivesti"ation a$out the rule o' #oer o'
* some real8ord #ro$lems related to scienti'ic
notation!
I will disribues a Worksheet, one for
ea) grou*. 4is Worksheet )onaining
wo *ars, firs is inesigaion abou e
rule of *ower of 18 and e se)ond is
some realwords *roblem relaed o
s)ienifi) noaion. Here i is.
Students acce#t -or.s"eet "iven $y the teacher!
4an" you, #aam$%ir.
Teacher as2s students to discuss and do the
or2sheet ith their "rou#!
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activities and hel#s students i' it is needed!
Is i doing grea, Guys?
>o you find any diffi)ulies?
Grea, go on, Guys.
they 'ind some di''iculties!
0es, #aam$%ir.
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Grou* +. Gie a big and for em...
Grea. >o you ae differen answer,
Guys?
'=, les )oninue e *resenaion o e
Hello, Guys. e would li"e o *resen our
wor" abou Worksheet Part A. &fer
dis)ussing is Worksheet, we find a
e number of 6ero is same as e inde of
18. If e inde is *osiie, en e 6ero
)omes afer 1. In e oer and, if e
inde is negaie, en 6ero )omes before
1. %o, if we wan o )oner from one form
o e oer form, we )an -us )oun e
6ero and ad-us e inde of 18, i)e ersa.
4as all our resul. 4an" you.
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*ar +. o wans o be e *resener?
0es, of )ourse. (lease wel)ome, Grou*
C.
9+*&***&***&***&*** 9!+*,
;&***&*** :!;*or2sheet
1:
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K. Assesment
1. Techni/ue: Grou# activities& Partici#ation in class
Instrument: >or2sheet& and O$servation sheet
1@
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Attachment 1
SLI#E
1A
Consider these following examples!
-!+*=
!+;*=
;!+*;
.=-*
.-+ **
- . ,*orld
1. The s#eed o' li"ht is 9=&*** miles3second! n illustration o' this
s#eed is i' a car is movin"at li"ht s#eed& then the car can
circumnavi"ate the earth < times #er second! The avera"e distance
$eteen the sun and the earth is ;&***&*** miles! It is so 'ar tat it
ta2es 9 minuts 'or the sun1s li"ht to reach the earth! In 'act& some o' the
"iant stars are so hu"e that they can occu#y a s#ace consistin" o' the
sun& the earth and s#ace $eteen them& and even more than that! One
o' the stars ith these characteristics caled 4etel"euse in the Orion
"ala%y! It has a diameter o' ,** million miles! This star is very 'ar
21
&nswerD
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&nswerD
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aay (a$out 9+*&***&***&***&*** miles)& so its li"ht ta2es ;* years to
reach the earth! Com#ared ith the other stars& 4etel"euse& hoever& is
still closer $ecause the li"ht o' the 'arthest star ta2es u# to ,&***
million years to reach the earth! 7%#ress the underlined num$er in
scienti'ic notation!
2. The ta$le $elo shos the data o' the estimated radius o' each #lanet
on their e/uators! ?e#resent the radius in decimal num$ers!
Planet ?adii (2m) 0ecimals
?e#resentation
7arth =!;9%*;
Au#iter
Mars ;!,*%*;
Mercury +!,,%*;
Ne#tune +!,9%*,
Saturn =!*;%*,
Branus +!-=%*,
Venus =!*-%*;
3. The area o' the earth1s sur'ace covered $y the ocean is ;=+&***&***
2m+!
a. >rite the area in scienti'ic notation!
b. The area o' the earth1s sur'ace is determined $y the 'ormula
22
&nswerD
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A=,Cr+
>here r is the earth1s radius! Dind the area o' the earth1s sur'ace& i'
its radius is =!;9*;
2m!
). >hat #ercenta"e o' the earth1s sur'ace is ocean@
23
&nswerD
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