KUMPULAN SOAL RECOUNT TEXT

REcount TEXT EXERCISES

Last Friday, a friend of mine asked me to accompany him to buy a new shirt at a department store. We left home at 03.00 p.m. by motorcycle. As soon as we arrived there, we went to the clothes section. I let him choose one. An hour later, I got bored watching him confused in choosing a shirt. So I left him and went to the cassette counter. Thirty minutes later, I went back to the clothes section but I couldn't find him there. My cell phone was broken so I couldn't call him. I went to the parking area. I saw his motorcycle was there but I couldn't find him. I waited for him for a few moments then finally I gave up and decided to go home.

When I arrived home, my mother told me that my friend called. She said that he was in the department store looking for me. My mother asked me to come back to the department store. Reluctantly, I walked to the department store and you know what? When I arrived there his motorcycle was not in the parking area. He just went home. I was very tired. There was no other choice, I had to walk home again. When I arrived home, I was so tired. I was very angry but when I saw my friend's broad smile greet me in front of the door, I just could not help laughing.

(Sumber Text dari soal UN SMP/MTS 2011)

1.  The text above is about ....
A. an embarrassing day
B. shopping with mother
C. the writer and his friend
D. my friend and his motorcycle

2.  The writer couldn't contact his friend because ....
A. he went home alone
B. his cell phone was broken
C. he was in the parking area
D. his friend was still choosing a shirt

3.  From the story above we can conclude that there was a problem because ....
A. the writer couldn't contact his friend
B. the writer's friend was in the clothes section
C. the writer and his friend couldn't ride the motorcycle
D. the writer and his friend decided to go to the department store

The following text is for questions 42 to 44

Charles Robert Darwin was born in Shrewsbury, England, on February 12, 1809. He came from a wealthy family and never had to work. He studied medicine and theology. In 1831 he graduated from University of Cambridge with a degree of theology.

He began a career as a scientist quite by chance. On December 27,1831, 22 years old Charles Darwin joined the crew of the HMS Beagle as a naturalist.The five years expedition collected hydrographic, geologic, and meteorologic data from South America and many other regions around the world. Darwin's own observation on this voyage led to his theory of natural selection.

Charles Darwin was greatly influenced by the geologist Adam Sedgwick and naturalist John Henslow in his development of the theory of natural selection, which was to become the foundation concept supporting the theory of evolution. Darwin's theory holds that environmental effects lead to varying degrees of reproductive success in individuals and groups of organisms. Natural selection tends to promote adaptation in organisms when necessary for survival. This revolutionary theory was published in 1859 in Darwin's now famous On the Origin of Species by Means of Natural Selection.

42. Charles Darwin's theory of evolution believed that ....
A. people could defend themselves naturally
B. environment affected natural election  
C. organism needed adaptation to survive
D. people and nature supported to each other
E. natural selection tend to adapt organism to survive

43. How was Darwin's theory of natural selection developed?
A. Adapted by the necessary for survival.  
B. Influenced by his collection.
C. Supported the effect of environment.
D. Influenced by John Henslow.
E. Affected by groups of organisms.

44. The famous Darwin theory was published based on ....
A. theories developed by other scientists
B. the influence of organisms adaptation in survival living
C. the success of his observation supported by geologist and naturalist
D. his expedition and natural observation data a scientist
E. the observation of other geologists' natural selection

Alfred Bernhard Nobel was a Swedish chemist, engineer, innovator, and ornament manufacturer. He was the inventor of dynamite. He also owned Bofors, which he had redirected from its previous role as primarily an iron and steel producer to a major manufacturer of cannons and other ornaments. He held 355 different patents, dynamite being the most famous. In his last will, he used his enormous fortune to institute the Nobel Prizes. The synthetic element nobelium was named after him. He was the third son of Immanuel Nobel and Andriette Ahlsell Nobel. Born in Stckholm on 21 October 1833, he went with my family to Saint Petersburg in 1842, where his father invented modern plywood. He studied chemistry with Professor Nikolay Nickolaevich Zinin. When he was 18, he went to the United States to study chemistry for four years and worked for a short period under John Ericsson, who designed the American Civil War ironclad USS Monitor.

Returning to Sweden, with his father after bankruptcy of his family business, he then devoted himself to the study of explosives, and especially to the save manufacture and use of nitroglycerine (discovered in 1847 by Acanio Sobrero, one of his fellow students under Theophile-Jules Pelouze at the University of Turin). A big explosion occurred on 2 September 1864 at his factory in Heleneborg in Stockholm, killing five people. Among them was his younger brother, Emil.

The foundations of the Nobel Prize were laid in 1895 when Alfred Nobel wrote his last will, leaving much of his wealth for its establishment. Since 1901, the prize has honoured men and women for outstanding achievements in physics, chemistry, medicine, literature and for work in peace.

1. Where did Alfred Nobel work with John Ericsson?
a. In Sweden
b. In the USA
c. In Stockholm
d. In Heleneborg
e. In Saint Petersburg

2. What is the main idea of paragraph 2?
a. Alfred Nobel devoted himself to the study of chemistry
b. His success with explosive finally led to the 1864 tragedy 
c. A big explosion in Heleneborg in Stockholm killed many people
d. A big explosion destroyed his factory in Heleneborg Stockholm
e. Alfred Nobel planned the safe manufacture and use of nitroglycerine

3. What was Bofor’s main business under Alfred Nobel?
a. It manufactured cannons and other ornaments 
b. It designed the ironclad monitor
c. It produced iron and steel
d. It produced dynamite
e. It invented nobelium

DR. ABDULRAHMAN SALEH

1909-1947

Born into a family of doctors in Kampung Ketapang, Kwitang Barat, Jakarta, Abdulrachman Saleh also became a doctor. After finishing MULO, he studied at STOVIA. While still a student, he was appointed assistant at the laboratory of physiology. Graduating from STOVIA, Abdulrachman Saleh continued his work at the lab while having his own medical practice.

Abdulrachman Saleh’s role in medicine was significant. He became a lecturer in Jakarta, Surabaya, Malang, and Klaten. For his meritorious service in medicine, specifically in physiology, in 1958, the University of Indonesia bestowed him the title of Bapak Ilmu Faal (Father of Physiology).

Abdulrachman Saleh was a man of many interests. He was involved in youth organizations like Boy Scouts and Indonesia Muda. He was also a member of Aeroclub, and co-founded theVerenigde Oosterse Radio Omroep (VORO), an organization of broadcasters. It was he who established the Voice of Free Indonesia, the radio station which spread the proclamation of Indonesia’s independence to the world.  

SOAL UN SMA 2012

1. Abdulrachman Saleh was bestowed the title Father of Physiology because ....
A. he was a lecturer in the Medical faculty of the University of Indonesia
B. he was a lecturer as well as a doctor
C. he had significant contribution in physiology
D. he was a lecturer in many parts of Indonesia E. he was a professor in physiology

2. The main idea of the first paragraph is that Abdulrachman Saleh ...
A. had his own medical practice,
B. studied at the medical school in STOVIA.
C. became a doctor because of his family.
D. was appointed assistant at the laboratory of physiology.
E. started his career as a doctor in STOVIA.

3. Besides medicine, Abdulrachman also had a special interest in ....
A. laboratorium assistance
B. student organizations 
C. aeroplane designing
D. broadcasting
E. politics

Maria Yuryevna Sharapova is a Russian professional tennis player. She was born in 1987 in Ngayan, Siberia.

At the age of three, Sharapova moved with her family to Sochi. She began playing tennis at the age of four using a racket given to her by Yevgeng Kafelnikov's father. At the age five or six, at a tennis clinic in Moscow, Sharapova was spotted by Martina Navratilova, who urged her parents to get her serious coaching in the USA.

At the age of seven, she and her father boarded a plane to the USA with only $700. Her father took her to the Nick Bollettieri Tennis Academy where one of the coaches check her out. The story goes that maria knocked his hat off with the tennis ball, thereby making a favorable impression. This led her obtaining a scholarship. At the age of nine, she was signed up by a number of sponsors including Prince (racquets), Oakley and Nike.

In 2004, Sharapova became the second youngest Wimbledon women's champion in open era (after Martina Hingis) by defeating defending two-time champion Serena Williams in straight sets (6-1, 6-4). In the process she also became the first Russian ever to win that tournament.

1. What is the text about?
A. The family of maria Sharapova
B. Professional tennis players in the world
C. The happiness of having a great father
D. The working experienceof maria Sharapova

2. In what age was miss Sharpova being a model of some products?
A. Three
B. Four
C. Five
D. Nine 

3. "... was spotted by Martina Navratilova ..." (Paragraph 2)
The synonym of the underlined word is...
A. seen
B. searched
C. placed
D. Introduced

My wonderful experience at the 2006 Asian Games in Doha

In December 2006, I went to Doha to participate in the 2006 Asian Games taking part in the Bach Volley Ball Championship. We prepared for a long time, training hard and fighting for approval of our participation. Nothing was easy. My partner, clear, my coach, King, and I were aiming to get into the top 8 at the Asian Games.

Unfortunately, I sprained my ankle one week before departure, which frustrated me beyond belief. I had physiotherapy every day following the injury, and tried to recover as quickly as possible. Of course, the ankle could not heal completely in a few days, so I had no choice but to just try my best and have my ankle taped when I played in matches.

We played against a team from Thailand, Mongolia, and Malaysia. The most difficult and important match was that against the Malaysian Team. We played well for the match and tried our very best. But finally we lost to them and ranked 9. It was so close. We nearly reached our goal - to be among the first 8 teams.

1.   The writer's team was bitten by the team from …

A. Qatar

B. Thailand

C. Mongolia

D. Malaysia

E. Indonesia

2.   What is the main idea of paragraph 2?

A. The ankle could not heal.

B. The writer sprained her ankle.

C. The writer tried hard to recover.

D. The ankle made the writer frustrated.

E. It needs a long time to heal her ankle.

3.   According to the writer. ... team was difficult to beat.

A. Thai

B. Qatari

C. Indonesian

D. Malaysian

E. Mongolian

I, Milton Friedman was born on July 31, 1921, in Brooklyn, N.Y., the fourth and last child and first son of Sarah Ethel (Landau) and Jeno Saul Friedman. My parents were born in Carpatho-Ruthenia of the Soviet Union. They emigrated to the U.S. in their teens, meeting in New York. When I was a year old, my parents moved to Rahway, N.J., a small town about 20 miles from New York City.

I was awarded a competitive scholarship to Rutgers University. I graduated from Rutgers in 1932. I financed the rest of my college expenses by the usual mixture of waiting at tables, clerking in a retail store, occasional entrepreneurial ventures, and summer earnings. Shortly, however, I became interested in economics.

In economics, I had the good fortune to be exposed to two remarkable men: Arthur F. Burns and Homer Jones. Arthur Burns shaped my understanding of economic research, introduced me to the highest scientific standards, and became a guiding influence on my subsequent career. Homer Jones introduced me to rigorous economic theory, made economics exciting and relevant, and encouraged me to go on to graduate work. On his recommendation, the Chicago Economics Department offered me a tuition scholarship. As it happened, I was also offered a scholarship by Brown University in Applied Mathematics, but, by that time, I had definitely transferred my primary allegiance to economics. In 1976 I won the Nobel Memorial Prize in Economics for my achievements in the fields of consumption analysis, monetary history and theory and for his demonstration of the complexity of stabilization policy. In 1977, at age 65,1 retired from the University of Chicago after teaching there for 30 years.

1. Who influenced Milton Friedman on economic research?
A. Sarah Ethel.
B. Jeno Friedman.
C. Arthur F. Burns. 
D. Homer Jones.
E. Alfred Nobel.

2. What is the main idea of paragraph 3?
A. Milton Friedman was very committed in his interest and talent in economics. 
B. Homer Jones shaped Milton Friedman understanding of economic research.
C. Arthur Burns introduced Milton Friedman to rigorous economic theory.
D. Brown University offered Milton Friedman a tuition scholarship.
E. Milton Friedman was offered a scholarship by the Chicago Economics Department in Applied Mathematics.

3. What did Milton Friedman do in financing his college expenses?
A. He was a teacher during summer.
B. He had a job in entrepreneur company.
C. He worked as a clerk in a retail store. 
D. He sold tables to people.
E. He taught economics in the university.

Diam , disini

Cuma di titik  ini

tanpa pernah berani untuk lebih dekat

dan tanpa pernah bisa untuk semakin menjauh

diam di satu tempat untuk waktu yang entah sampai kapan

diam untuk bisa menikmati sedikit apapun yang bisa dinikmati di titik ini

diam , dan siap terluka 

kapanpun harus luka

                                                                                                   fathfath, Tue-10-12-13               

Our Memory September'13

Kenangan masa SMA tuh emang ga akan pernah dilupain bagi setiap orang yang melewatinya, termasuk aku. salah satu cerita SMA yang berkesan banget bahkan membekas sampai detik ini adalah saat study tour Jogja - Malang , 8 - 13 September 2013. trip yang jauuuhhh banget dan super cape tapi seru dan ga akan terlupa hehe

study tour ini juga bikin aku lebih kenal sama temen2 satu angkatan terutama yang tadinya ga aku kenal hehe. waktu itu kita ngelewatin hari selama kurang lebih 6 hari bareeeenggg terus. dari mulai cerita2 dan nyanyi2 di bis, foto2 ,  makan bareng, sampai ngantri kamar mandi di rest area bareng hahaha. aku kangen masa itu, tapi semua itu hanya terjadi sekali seumur hidup dan ga akan keulang.

ini beberapa tempat yang aku dan temen2 angkatan 9 delta kunjungin...

"Waktu posting ini aku beneran nangis, rasanya mau balik kesana sama kalian tapi ga mungkin dan ga akan pernah mungkin. mungkin suatu saat nanti aku bakalan balik ke semua tempat itu. dan setibanya disana aku bakalan berdiri dan natap semua kenangan kita disana. Dan mungkin dalam hati aku bakalan bilang "aku kangen waktu disini  sama kalian kawan. kita pernah bareng2 kesini, dulu, SMA". "

SMA Negeri 8 TANGERANG

Dibalik rasa Misterius

"Asin itu...

rasa paling aneh yang pernah ada

rasa yang ga bisa di tebak dari penampilan 

rasa yang ga terduga dari baunya

secara fisik , ga ketebak kalau itu asin

tapi kalau udah di rasain , baru kerasa"

itu cuma deskripsi aku tentang dibalik rasa yang misterius, asin hehehe


Fathimah Sholihah
SMA Negeri 8 Tangerang

Happy Wednesday

cerita indah sama kalian tuh emang ga bakalan pernah ada abisnya deh. kawan , kenalian ini sahabat ku. tempat dimana aku berbagi lebih dalam, bercerita lebih jauh, sedih lebih haru wuahh semuanya deh. sama mereka udah banyak yang aku lewatin

moment di foto itu terjadi hari rabu, 19 juni 2013. salah satu dari sahabatku, Aulia Chintia Ambarita (berkerudung merah di foto) adalah orang Aceh. dia lgy main ke Tangerang beberapa hari yang lalu. dan aku ajak dia untuk nonton film. sekaligus aku mau kenalin dia sama sahabatku yang lain seperti ochie, Zulfa, Hani, Kania. pas lgy jalan kita bener bener gila2an loh :). dan tenyata aulia bisa gabung dan nyambung sama sahabatku yang lain begtu jga sebaliknya. mereka th welcome bgt sama aulll...

dari mulai nonton film yang kurang jelas, kata orang2 sih lucu tapi jujur deh  kita bingung apa yang lucu hahaha. trus kita makan tapi ceritaaaaa muluuu hahaha 

oh iya ada satu teori Aulia yang dia sampein waktu lgy makan , dan menurut aku teori ini bener bgt 

gini nih teorinya "cowo itu kalau punya wajah ganteng pasti dia bakalan stay cool alias lebih banyak diem karena memang dia udah ganteng, tapi kalau wajahnya biasa aja alias kurang ganteng dia bakalan so rame, so lucu,buat nunjukkin kalau dy th ganteng" 

menurut aku ini bener, ga ada yang salah dari kedua tipe cowo itu, tapi yang salah adalah kalau ada cowo kurang ganteng tapi dia so' stay cool. wuahhh pasti dijauhin kaliya hahaha

oh iya abis itu kita belanja cemilan gtu di Hypermartm, yang satu kesini, yang satu kesana tapi aku malah nganter si aulia sama ochie yang minta di anter kesana dan kesini. dari mulai liat sayur lah, es krim yang rasanya aneh lah . pokoknya banyak dh ahahaha

oh iya pas nonton kita sempet ketinggalan sedikit gtu deh, dan pas baru masuk dimana semua lgy ketawa ketiwi kita malah baru dateng dengan tampang polos haha

abis itu kita masih mau nongkrong di McD sekalian mau liat sunset hahahha mana ada ya?

di situ kita emg cuma nyemil nyemil sama cerita cerita gila. tapi ada yang lebih gila kita foto2 gtu dan duduk madep angko angkot dan mobil yang lewat. dari mulai foto mirng kanan terus kekiri. wuahhh sebenernya malu di liatin  orang yg lewat, tpi berhubung lgy ga kenal jadi so what ajalah hahaha

pokoknya every moment with you is the sweatest heart deh hahaha

Gimana bisa...??

Aku bingung,
Bagaimana mungkin aku bisa menanggukkan kepala, sementara aku tidak setuju...?
Bagaimana mungkin aku berkata "iya" , sementara hati benar - benar berkata "tidak"...?
Bagaimana mungkin aku membenarkan sesuatu yang jelas - jelas aku anggap "Salah"...?
Bagaimana mungkin aku memilih jalan yang sudah pasti sessat....?

Jujur , aku bukan ingin menghancurkan mereka
Aku hanya ingin berarti untuk mereka
Sekecil apapun, aku hanya ingin dapat di kenang atas apa yang aku lakukan
Bukan cara ini yang aku mau......
tapi mereka meminta cara ini
trus aku harus gimana??

Setiap detik, aku selalu berharap semua yang terbaik
tapi apa mungkin semua akan baik sementara caranya tidak baik??
Setiap Waktu , aku selalu bermimpi sampai di satu titik
tapi gimana bisa sampai kalau aku hanya diam di tempat?

God...
saat ini , semua terlihat percuma
meski aku yakin tidak akan pernah ada yang percuma
andai aku bisa mengulang waktu
tidak akan pernah aku meletakkan kesalahan di tempat yang sekarang
aku akan meletakkannya di tempat yang jauhhh, sampai tidak ada yang tahu kecuali engkau
tapi tetap tidak menyakitkan siapapun

sekarang, semua sudah terlanjur
sulit rasanya mengambil emas yang sudah tertimbun tanah berlapis lapis dalamnya
mana mungkin aku sendirian yang mengambil emas itu, sementara kalian sendiri yang menimbunnya
bagaimana mungkin, aku mengajak kalian mengambil emas itu sementara kalian betah dengan semua timbunan yang ada??

Aku Mau Kalian Berubah
bukan untuk aku, bukan untuk kepentingan SAAT INI
Tapi untuk diri kalian sendiri dan Kepentingan kalian nantinya

aku selalu peduli kalian
aku selalu berharap yang terbaik untuk kalian
tapi apa pernah sedikit aja kalian berpikir jauh tentang aku
tentang semua yang aku rasa disaat kalian tertawa
disaat kalian menganggapnya "tidak apa" sementara aku menanggapnya "ini sakiiittt kawan"
aku lelah, tapi aku harus bagaimana?
aku cuma ingin menghabiskan waktu ini dengan kalian
tapi segini mahalnya kah untuk sebuah pertemanan???

PPT B. Indo

Kerangka PPT B. Indo ini yang aku denger dari pak Bandi di kelas , kalau belum lengkap atau ada yang mau nambahin silahkan ya...
1. Judul = termasuk alasan memilih judul
2. Asumsi
3. Metode
4. Hasil
5. Manfaat
6. Suka Duka

Dari kerangka tersebut , kita coba tafsirin yuk *caelah
1. Judul "kita bisa tulis judul asli kita di sebuah slide, dilengkapi alasannya. emm tapi kayaknya judul sama alasannya di slide yang berbeda aja kaliya"
2. Asumsi "apa ya?? menurut aku dugaan kita sebelum penelitian jadi menurut kita si responden bisa gak sih kira2 jawab angket kita"
3. Metode "metode atau cara kita melakukan penelitian, seperti yang tercantum di karya tulisnya masing masing juga boleh mau lebih di singkat siph aja"
4. Hasil "nah disini sajikan deh hasil penelitian kita, seperti hasil dan pambahasan yang ada di makalah tapi juga di gabungin sama pengolahan data seperti tabel dan grafik juga boleh kayaknya"
5.  Manfaat "seperti di karya ilmiah kita masing2"
6. Suka Duka "nah ini waktunya curhatin semua yang kamu alami selama penelitian , yang seneng sedih atau apalah bisa kita tuangin disini"

Nah, tafsiran diatas mungkin salah atau masih terlalu sederhana, lengkapin bareng yuk... :)

Laporan Praktikum Osmosis dan Difusi

Laporan Praktikum Biologi

Osmosis dan Difusi

“menguji adanya peristiwa osmosis pada kentang dan difusi pada teh celup”

Fathimah Sholihah XI IPA 2

1/1/2012

Guru pendamping: Yuni Hartati

 

BAB I

PENDAHULUAN

1.1  Latar Belakang

Bila kita memperhatikan kehidupan disekitar kita yang begitu luas ini, pastinya tidak terlepas dari pengetahuan tentang hirarki Biologi. Dalam ilmu biologi , sel merupakan unit terkecil yang dapat melakukan aktivitas kehidupan. Seperti kita tahu, bahwa didalam organisme terdapat alat transport yang mampu mengatur organisme lainnya . Hal itu sering dikenal dengan Transpor zat. seperti tumbuhan,transport zat dilakuakan untuk mendistribusikan energy yang mereka dapatkan dari alam.

Transpor zat terbagi menjadi 2, yakni transport zat aktif dan pasif. dalam percobaan ini, lebih ditekankan kepada transport zat pasif yang terdiri dari osmosis dan difusi.

Osmosis adalah pergerakan molekul air dari larutan dengan konsentrasi air lebih tinggi (potensila air lebih besar) menuju larutan dengan konsentrasi air lebih rendah (potensial air lebih kecil) melalui membrane semipermeabel.

Difusi adalah perpindahan zat (gas,cair, dan padat) dari larutan berkadar tinggi ke larutan berkadar rendah tanpa bantuan energy, hingga dicapai larutan yang kadarnya sama.

Nah, percobaan ini dilakuakan guna memperlihatkan adanya peristiwa osmosis dan difusi dalam kehidupan sehari-hari, meskipun peristiwa tersebut hadir tanpa kita sadari.

1.2  Rumusan Masalah

1.      Pada menit keberapa terbentuk larutan isotonis air the?

2.      Apa yang terjadi pada kentang  1 (yang direndam air biasa), kentang 2 (yang direndam 10% garam) serta kentang 3 (yang direndam 50% garam)?

Mengapa demikian?

3.      Jelaskan proses yang terjadi pada percobaan no. 1 dan 2?

4.      Buatlah kesimpulan dari percobaan ini?

1.3  Tujuan Percobaan

Percobaan ini dilakuakan guna mengetahui lebih jauh mengenai peristiwa osmosis dan difusi beserta perbedaan dari keduanya agar kami dapat lebih memahami bahwa benar adanya peristiwa osmosis dan difusi dalam kehiduan sehari-hari.

1.4  Waktu dan Tempat Pelaksanaan

Tempat : Laboratorium Biologi SMAN 8 Tangerang

Waktu  : Rabu , 29 Agustus 2012

BAB II

LANDASAN TEORI

Pada membran sel terikat protein yang menembus maupun yang berada di luar permukaan. Pernyataan ini berdasarkan atas penemuan S.J Jinger dan G. Nicholson pada tahun 1972 tentang teori membran yang dikenal sebagai model mozaik fluid. Dengan melihat struktur seperti yang disebutkan di atas, membran bukan hanya sebagai pembatas suatu sel, tetapi lebih kompleks lagi karena membran memiliki kegunaan lain seperti berperan dalam lalu lintas keluar masuknya sel.

Transportasi molekul yang menuruni gradien konsentrasi disebut dengan transportasi pasif, sedangkan transportasi molekul yang melawan gradien konsentrasi disebut transportasi aktif. Molekul-molekul yang berukuran besar dalam proses transportasinya melibatkan pelekukan membran sel sehingga membentuk suatu vesikula. Transportasi aktif meliputi proses pompa ATP, eksositosis, dan endositosis. Adapun transpor pasif meliputi proses difusi, osmosis, dan difusi terbantu.

Transpor pada membran tergantung pada ukuran molekul dan konsep zat yang melewati membran sel tersebut molekul-molekul yang berukuran kecil dapat melalui membran sel dengan dua cara, yaitu:

· Dari konsentrasi tinggi ke konsentrasi rendah, atau bisa juga

· Menuruni gradien konsentrasi tinggi ke konsentrasi rendah.

BAB III

HASIL EKSPERIMEN

   3.1 Alat dan Bahan

     Alat:

1.      Pisau

2.      Pengaduk

3.      Neraca

4.      Labu Erlenmeyer (4 buah)

5.      Stopwatch

         Bahan:

1.      Teh celup (1 buah)

2.      Kentang (1 buah)

3.      Garam (1 bungkus)

    3.2 Cara Kerja

                     Percobaan pertama:

1.       Siapkan Labu Erlenmeyer, kemudian isi  dengan 150 ml air

2.      Masukan teh celup, dan mulai hitung dengan stopwatch.

3.      Diamkan sampai larutan tercampur , tanpa diaduk.

                      Percobaan kedua

1.      Siapkan 3 buah labu Erlenmeyer, kemudian isi dengan air. Labu Erlenmeyer pertama isi dengan 150 ml air sedangkan yang kedua dan ketiga cukup 100 ml air.

2.      Potong kentang menjadi 3 bagian, kemudian timbang masing masing potongan kentang dan catat hasilnya.

3.      Masukan 10% garam kedalam labu Erlenmeyer kedua, dan 50% garam   kedalam labu Erlenmeyer ketiga. Kemudian aduk keduanya hingga rata.

4.      Masukkan potongan kentang kemasing-masing gelas, diamkan kurang lebih sampai 15 menit.

5.      Angkat kentang dari rendaman , kemudian timbang kembali masing-masing kentang dengan neraca.

   3.3 Hasil Pengamatan

Percobaan pertama:

Tanpa diaduk , dengan sendirinya teh celup dapat tercampur dengan air meskipun dengan waktu yang lebih lama. Proses pencampuran antara teh celup dan air membutuhkan waktu 39:07 menit.

Percobaan kedua:

NO	JENIS LARUTAN	BERAT KENTANG
		SEBELUM PERCOBAAN	SESUDAH PERCOBAAN
1	AIR BIASA	14,1 gr	14,4 gr
2	LARUTAN GARAM 10%	16,3 gr	14,9 gr
3	LARUTAN GARAM 50%	14,6 gr	13,0 gr

3.4  Pertanyaan dan Jawaban

a.      Pada menit keberapa terbentuk larutan isotonis air teh?

                Larutan istonis air teh terbentuk pada menit ke 39:07 menit.

b.      Apa yang terjadi pada kentang ke 1, II dan III?

                Kentang ke 1: pada kentang pertama yang direndam dengan air biasa , mengalami     peristiwa osmosis dimana kandungan air yang ada diluar kentang lebih besar sehingga air cenderung masuk dan menyebabkan berat kentang bertambah (hipotonis).

                 Kentang ke 2 dan ke 3: pada kentang kedua dan ketiga juga mengalami peristiwa osmosis dimana kandungan air pada kentang lebih besar sehingga air cenderung keluar yang menyebabkan berat kentang berkurang (hipertonis).

c.       Jelaskan proses yang terjadi pada percobaan 1 dan 2?

                  Pada percobaan 1, terjadi peristiwa difusi dimana terjadi perpindahan zat dari larutan yang memiliki konsentrasi air rendah (hipertonis) ke larutan yang konsentrasi airnya  tinggi  (hipotonis) yakni air berperan sebagai hipotonis sedangkan teh celup sebagai hipertonis sehingga menghasilkan air teh sebagai isotonis.

                Pada percobaan 2 : yakni ketiga kentang mengalami proses osmosis dimana terjadi perpindahan zat dari larutan yang konsentrasi airnya tinggi (hipotonis) ke larutan yang konsentrasi airnya rendah (hipertonis). Dalam hal ini pada kentang pertama air berperan sebagai hipotonis dan kentang sebagai hipertonis. Sedangkan pada kentang ke II dan ke III, larutan garam berperan sebagai hipertonis sedangkan kentang sebagai hipotonis.

BAB 1V

          PENUTUP

4.1  Kesimpulan

·         Adanya proses Transpor zat dengan difusi dan osmosis dalam kehidupan sehari-hari.

·         Proses difusi merupakan perpindahan zat dari yang konsentrasi airnya rendah (hipertonis) ke larutan yang konsentrasi airnya tinggi (hipotonis).

·         Proses osmosis merupakan perpindahan zat dari yang konsentrasi airnya tinggi (hipotonis) ke larutan yang konsentrasi airnya rendah (hipertonis).

4.2   Saran

      Harapan saya, percobaan atau praktek biologi semacam ini terus diadakan guna membantu siswa semakin mengenal alat-alat yang ada di laboratorium sehingga tidak asing ketika berjumpa dengan alat tersebut, selain itu praktek seperti ini juga membuat siswa mengerti konsep biologi bukan hanya berdasarkan teori namun juga secara praktek.

4.3  Daftar pusaka  

Diah Aryulina Ph.D., dkk.2006.Biology for senior high school grade XI semester 1:esis.

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