National exam becomes the hot topic in most of discussions. Though the Supreme Court has rejected an appeal by the go-vernment on the organization of the national exams, the controversy over whether it is necessary to maintain the national exams (UN) has continued. Some debates include the primary questions such as; does the quality of Indonesia education depend on the national exam?, will the quality of the Indonesian education system worsen without natipnal exam?

People, who support the national exam explain that the quality of the Indonesia education system will drop without the national exam, so they try to defend the current system.

However there are people who disagree with the opinion. Those who against this national exam kept in our high school education say that it doesn't need the national exams because the quality of education does not just depend on the national exam. Further, the national exam only measures a small portion of students' competence in specific subjects, and does not measure students' competences throughout the semester.

In fact, the national examination can still be useful as an instrument to evaluate or detect the level of students' cognitive competence in several subjects, on a national scale.

 

source : http://bos-sulap.blogspot.com/2010/02/national-exam-in-pros-and-cons.html

 

What is photosynthesis? Photosynthesis is a food-making process that occurs in green plants. It is the chief function of leaves. The word photosynthesis means putting together with light. Green plants use energy from light to combine carbon dioxide and water to make sugar and other chemical compounds.

How is the light used in photosynthesis?

The light used in photosynthesis is absorbed by a green pigment called chlorophyll. Each food-making cell in a plant leaf contains chlorophyll in small bodies called chloroplasts. In chloroplast, light energy causes water drawn form the soil to split into hydrogen and oxygen.

What are the steps of photosynthesis process? Let me tell you the process of photosynthesis, in a series of complicated steps, the hydrogen combines with carbon dioxide from the air, forming a simple sugar. Oxygen from the water molecules is given off in the process. From sugar together with nitrogen, sulphur, and phosporus from the soil-green plants can make starch, fat, protein, vitamins, and other complex compounds essential for life. Photosynthesis provides the chemical energy that is needed to produced these compounds.
source : http://bos-sulap.blogspot.com/2010/10/explanation-text-about-photosynthesis.html

Tsunami

The term of “tsunami” comes from the Japanese which means harbour ("tsu") and wave ("nami"). A tsunami is a series of waves generated when water in a lake or a sea is rapidly displaced on a massive scale.

A tsunami can be generated when the sea floor abruptly deforms and vertically displaces the overlying water. Such large vertical movements of the earth's crust can occur at plate boundaries.

Subduction of earthquakes are particularly effective in generating tsunami, and occur where denser oceanic plates slip under continental plates.

As the displaced water mass moves under the influence of gravity to regain its equilibrium, it radiates across the ocean like ripples on a pond.

Tsunami always bring great damage. Most of the damage is caused by the huge mass of water behind the initial wave front, as the height of the sea keeps rising fast and floods powerfully into the coastal area.

The Persian is a longhaired breed of cat characterized by its round face and shortened muzzle. Its name refers to Persia, the former name of Iran, where similar cats are found. Recognized by the cat fancy since the late 19th century, it was developed first by the English, and then mainly by American breeders after the Second World War. In Britain, it is called the Longhair or Persian Longhair.

The selective breeding carried out by breeders has allowed the development of a wide variety of coat colors, but has also led to the creation of increasingly flat-faced Persians. Favored by fanciers, this head structure can bring with it a number of health problems. As is the case with the Siamese breed, there have been efforts by some breeders to preserve the older type of cat with a more pronounced muzzle, which is more popular with the general public. The hereditary polycystic kidney disease is prevalent in the breed, affecting almost half the population in some countries.

The placid and unpretentious nature of the Persian confers a propensity for apartment living. It has been the most popular breed in the United States for many years but its popularity has seen a decline in Britain and France.

Origin

In general, it's not clear when longhaired cats first appeared, as there are no African Wildcats, which are believed to be ancestors of domesticated cats, with long fur. There were claims in the 19th century that the gene responsible for long hair was introduced through hybridization with the Pallas cat, however, research in the early 20th century refutes this theory.

The first documented ancestors of the Persian were imported from Khorasan, Persia into Italy in 1620 by Pietro della Valle, and from Angora (now Ankara), Turkey into France by Nicholas-Claude Fabri de Peiresc at around the same time. The Khorasan cats were grey coated while those from Angora were white. From France, they soon reached Britain. Longhaired cats were also imported to Europe from Afghanistan, Burma, China and Russia. Interbreeding of the various types were common especially between Angoras and Persians^.

Recent genetic research indicates that present day Persians are related not to cats from the Near East but to cats from Western Europe. The researchers stated that "Even though the early Persian cat may have in fact originated from ancient Persia, the modern Persian cat has lost its phylogeographical signature."

Development

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  Persians and Angoras 

  

  Traditional Persian cat

  

  Himalayan

  

  Exotic Shorthair

  

   Chinchilla