Jumat, 13 Februari 2009

EXPLOSIONS




A volcano is a geological landform (usually a mountain) where magma (rock of the earth's interior made molten or liquid by high pressure and temperature) erupts through the surface of the planet.
In simple terms a volcano is a mountain that opens downward to a pool of molten rock below the surface of the earth. It is a hole in the Earth from which molten rock (magma) and gas erupt. The name "volcano" has its origin from the name of Vulcan, a god of fire in Roman mythology. As pressure in the molten rock builds up it needs to escape somewhere. So it forces its way up “fissures” which are narrow cracks in the earths crust. Once the magma erupts through the earth’s surface it is called lava.
The world's largest, active volcano is Mauna Loa in Hawaii, where famous coffee is grown in the rich volcanic soils. Mauna Loa is 13,677 feet above sea level. From its base below sea level to its summit, Mauna Loa is taller than Mount Everest. Mauna Loa is about 36 m (120 ft) lower than its neighbour, Mauna Kea. However, the biggest volcano explosion we ever had was in Sunda Strait, Indonesia.


Indonesia as a part of the Asia-Pacific’s “Ring of Fire”, has at least 129 active volcanoes. Semeru, Merapi, and Dukono, are listed as number 10, 11, and 12 in “20 World’s Most Active Volcanoes”. Semeru volcano is the highest in Java and has been the site of numerous deaths, the most recent being in August 2000. One of Mount Merapi’s deadliest eruptions was in 1930, when about 1.300 people were killed. A gas cloud
Mount Merapi, Central Java

from the volcano’s 1994 eruption killed 60 people. Both the Semeru and Merapi are in Java.




Krakatoa

Krakatao, is a volcanic island in the Sunda Strait between the islands of Java and Sumatra in Indonesia. It is best known eruption culminated in a series of massive explosions on August 26–27, 1883. It was equivalent to 200 megatons of TNT — about 13,000 times the yield of the Little Boy bomb that devastated Hiroshima, Japan, and four times the yield of the Tsar Bomba, the largest nuclear weapon ever built. The 1883 eruption ejected approximately 21 cubic kilometres (5.0 cu mi) of rock, ash, and pumice, and generated the loudest sound historically reported: the cataclysmic explosion was distinctly heard as far away as Perth in Australia approx. 1,930 miles (3,110 km), and the island of Rodrigues near Mauritius approx. 3,000 miles (5,000 km) distant.
Near Krakatoa, according to official records, 165 villages and towns were destroyed and 132 seriously damaged, at least 36,417 (official toll) people died, and many thousands were injured by the eruption, mostly from the tsunamis that followed the explosion. The eruption destroyed two-thirds of the island of Krakatoa.
The destroyed land has never been repopulated, reverted to jungle, and is now called The Ujung Kulon National Park.



If Volcanoes are that dangerous and terrifying, why were people still live there?

People set up homes on the slopes of volcanoes because of the rich, fertile soil produced. For example, many of the volcanic materials have important industrial and chemical uses. A natural glass that comes from lava is pumice, it is widely used for grinding and polishing metals, stones, and other materials. When lava dries and makes a rock form it is commonly used in building roads. Volcanic ash that has been weathered greatly improves soil fertility.
Volcanic material has a source of precious gems, Opal. It also has a source for metals, gold, silver, molybdenum, copper, zinc, lead, and mercury. When volcanoes erupt, the lava releases some healthy gases, including carbon dioxide and hydrogen. When oxygen mixes with hydrogen, it creates water vapor and that begins the water cycle.



The exhibit says that the most reliable sign of a volcanic eruption is probably earthquakes in the area of the volcano. Other signs can be gas emissions and surface deformation which is kind of like when lots of pressure builds up in the magma chamber in the volcano before the volcano erupts, and it causes cracks on the surface of the volcano. And if there are animals, especially underground animals like moles, running away from their homes, it’s a sign of any disaster.

TOTAL: 715 WORDS.
Source:
http://library.thinkquest.org/TQ0312395/Benefits.htm
http://www.volcanolive.com/active2.html
http://www.woodlands-junior.kent.sch.uk/Homework/mountains/volcanoes.htm
Wikipedia
By:
Anggi Ghaisani, Bina, Fritta Aulia, Nadia Dwi, Sheila Claudia
XB



BATIK!!!!!

Hi,this is Sheila.. At last..I have an idea what to write in this blog. After a lot of thinking,I've decided to share one of the fun things that I did on the day the Labs Interval was held. Last friday on january 30th Labs Interval was held, it was actually fun but at twelve o'clock we had to take a break so all of the boys can do their friday prayings,during that time I was bored to death because I don't have anything to do. But then I saw some people doing something interesting, it made me curious then I realized that they were making batik patterns on the top of a white cloth. I jumped in right away because I wanted to know what it feels like to make a batik since I've never done it. Nadia and Anggi also tried it too, it's way more fun having them around.


So when I just started it was quite easy,all we have to do is to move the canting according to the pencil lines, but after a while suddenly a big splash of ink fell into the cloth and ruined the patterns. It happened more than once, it was quite frustrating,making batik is not as easy as I thought it would be..I hate the fact that there were so many splashes of ink in my batik patterns,but after a while I get used to the situation,and even three tiny splashes of ink fell into my skirt.Then finally our batiks are done, Anggi's batik was stunning, Nadia's batik was also great,guess what.. My batik was a mess,there were a lot splashes of ink on it but shockingly, I'm pretty proud of it.. That was a fun experience, I recommend all of you to try it.. By the way I wonder when can I have my batik ???


Anggi and Nadia's batik

My work of art :)

Kamis, 12 Februari 2009

My Beloved Novels ever!


Hello it's Fritta Aulia Sari or as you know Tita writing. Glad that finally I post my writing to this blog. Of course you know Twilight Movie, right? But do you know that the film is based on the bestseller novel by Stephenie Meyer? Just for the information, I'm one of the millions Twilight Saga fans (my friends of course had already know that because at least a bit of everyday I talk about these books hahaa :D). The first time I knew these novels when I was still at the 9th grade in Junior High School. At that time, the Indonesian version of the novel was just Twilight. And actually I bought Twilight just because I interested with the cover. So it was like buy a lottery (if it great I will happy, but if it bad I will dissapointed)

And fortunately with my lucky that time, Twilight is the BEST novel I've ever read in my whole life! Hahaa sorry if it's too much :D But hey it's true!

And then right after that, I browsed the internet to see Twilight. And I surprised because in America it had already came out until the 3rd book. And at that time the Americans was waiting for the last book. When I saw that, of course with my crazyness I really really wanted to buy all of that! Then I told my mom that I really want to buy those English version of the novels. I wait curious and I'm happy because my mom let me to buy all of the novels! LOL so heavenly :D Now those novels are safely kept in my lovely room. Ooh so happy.. :)

Jumat, 16 Januari 2009

Greetings !

Hello, this is Obin, glad to be the first to post .

Along with my other 4 classmates; Sheila, Anggi, Tita, and Nadia, we make this blog as our English assignment for Miss Arifah .

Enjoy ;)

There aren't a lot of things happened today, just another ordinary school day. There were only three subjects for Friday; Japanese, Chemical, and Mulok. All three of them are boring, I only took the notes the teachers gave to me without really hearing what they said. Then on LISA(Labschool International Student Association), Tyas, my classmate, and I attended a meeting for Labs Interval(Labschool International Festival). There will be Debate, Speech, and Essay contests for SMP-SMA students around Jakarta, and a festival too. With gigs and workshops and things. Both the festive and contest will be held on January 31th at Labschool Rawamangun @ Jl. Pemuda, make sure you come! I didn't really participate the meeting, I only help a little, since I'm a new guy at LISA. But I like LISA, the people are really nice and kind : )