lesson plan scientific notation

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!

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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!

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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

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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

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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!

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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!


8/23

>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&

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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.


11/23

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




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

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K. Assesment

1. Techni/ue: Grou# activities& Partici#ation in class

Instrument: >or2sheet& and O$servation sheet

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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

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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

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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@

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lesson plan scientific notation

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