The harp is a musical instrument
very popular with the Welsh.
The harp consists of a wood or
metal frame and usually 47 strings.
When a harpist plays their harp, they pluck
the strings, all of which have been tuned
to a different note. They can also raise or
lower the pitch by pressing one of the
seven pedals on the front.
Harps are particularly popular with folk
singers who sing while accompanying
themselves on the harp. Most orchestras
also have at least one harpist in them.

How Venus eclipse happens is best given to an example of explanation texts. Explanation text is compose to describe how something forms and why something exists and happens.
What is an explanation text and how is the explanation text composed? Explanation text is structured by the generic level of general statement and followed with sequenced explanation. To have clear understanding on the explanation text, let's see the following example of explanation text!

How Venus Eclipse Happens
On May 16, 2010, people in most regions in the world have seen a very rare natural phenomenon. It was Venus eclipse. It was very rare amazing natural event. It was reported that the Venus eclipse will seen again in the future in 2050. Do you know how this rare Venus eclipse happens?
Well, actually Venus eclipse is like Sun eclipse. Venus eclipses occurs when the position of the earth, moon and Venus is parallel. Venus planet will slowly disappear for a moment because it is covered the surface of the Moon. Venus planet seems to move to the back side of the Moon.
The moon and planets are sharing a similar apparent path in the sky. That is why, it is not unusual for the moon to appear to pass close to Venus. In fact, the moon appears somewhere near it about once a month. However, most people don’t see these events because they are visible in the evening sky only half the time, and then only for a short period after sunset. The apparent closeness varies from month to month as well.
Note: This example of explanation text about how Venus eclipse happens is arranged from beranda-jiwa.info and earthsky.org

What is cancer? It is actually a group of more than one hundred separate diseases. Most of us are fear from cancer It is reasonable because next to heart disease, cancer is the second leading cause of death.
Cancer cells come from normal cells because of mutations of DNA. Those mutations can occur spontaneously. The mutations may be also induced by other factors such as: nuclear and electromagnetic radiation, viruses, bacteria and fungi, parasites, heat, chemicals in the air, water and food, mechanical cell-level injury, free radicals, evolution and ageing of DNA, etc. All such factors can produce mutations that may start cancer.
Cancer cells are formed continuously in the organism. It is estimated that there are about 10,000 cancer cells at any given time in a healthy person. Why do some result in macroscopic-level cancers and some do not? First, not all damaged cells can multiply and many of them die quickly. Second, those which potentially divide and form cancer are effectively destroyed by the mechanisms available to the immune system. Therefore cancer develops if the immune system is not working properly or the amount of cells produced is too great for the immune system to eliminate.

(Simplified from:www.digital-recordings.com/publ/cancer.html)

Why is Bali Famous for Tourism Object?
One of the famous tourism spots in Indonesia is Bali island. Bali lays at the part east of Java. Thousand domestic and foreign tourists visit Bali each month. Do you know why Bali island is so famous?
A lot of tourists like fresh natural environment. If that what they want, Bali is the best choice to visit. Bali has beautiful landscape dominated with green luxurious terrace fields. Moreover Bali give fantastic view; beautiful sunrise in Sanur and fascinating sunset in Kuta beach.
Beside the beautiful beach and panorama, domestic and foreign tourists also enjoy the balinese local genius arts such as; dances, puras, and temples. Most of these objects are amazing.
Like many other tourism objects, Bali also provide souvenir center which they can take home. Most balinese people are artists. They spend their time to apply skill and imagination through painting, carving dancing.
What make them more exposed is that most of them are English speaking people. That is why Bali is well-known all over the wold.

How Earthquakes Happen
Earthquake is one of the most destroying natural disasters. Unluckily it often happens in several regions. Recently a horrible earthquake has shaken West Sumatra. It has brought great damages. Why did it occur? Do you know how an earthquake happens?

Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves. It make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little. They don't just slide smoothly. The rocks are still pushing against each other, but not moving. After a while, the rocks break because of all the pressure that's built up. When the rocks break, the earthquake occurs.

During the earthquake and afterward, the plates or blocks of rock start moving, and they continue to move until they get stuck again. The spot underground where the rock breaks is called the focus of the earthquake. The place right above the focus is called the epicenter of the earthquake.

How Venus eclipse happens is best given to an example of explanation texts. Explanation text is compose to describe how something forms and why something exists and happens.
What is an explanation text and how is the explanation text composed? Explanation text is structured by the generic level of general statement and followed with sequenced explanation. To have clear understanding on the explanation text, let's see the following example of explanation text!

How Venus Eclipse Happens
On May 16, 2010, people in most regions in the world have seen a very rare natural phenomenon. It was Venus eclipse. It was very rare amazing natural event. It was reported that the Venus eclipse will seen again in the future in 2050. Do you know how this rare Venus eclipse happens?
Well, actually Venus eclipse is like Sun eclipse. Venus eclipses occurs when the position of the earth, moon and Venus is parallel. Venus planet will slowly disappear for a moment because it is covered the surface of the Moon. Venus planet seems to move to the back side of the Moon.
The moon and planets are sharing a similar apparent path in the sky. That is why, it is not unusual for the moon to appear to pass close to Venus. In fact, the moon appears somewhere near it about once a month. However, most people don’t see these events because they are visible in the evening sky only half the time, and then only for a short period after sunset. The apparent closeness varies from month to month as well.
Note: This example of explanation text about how Venus eclipse happens is arranged from beranda-jiwa.info and earthsky.org

Seeing the social function, both procedure and explanation texts have the similarity in which both describe how to make or done something. They give the detail description on something, phenomena, goods, product case or problem.
To see the differences between explanation and procedure, we have to analyze the dominant language feature and how the texts are used.
Procedure, this text type is commonly called as instruction text. It uses pattern of commend in building the structure. It use the “to infinitive verb” which is omitted the “to”. It is a kind of instruction text which uses full commend verb. Procedure is commonly used to describe how to make something which is close to our daily activity. For example how to make a cup of tea, how to make a good kite, etc is the best example of the procedure text. It is such word; first boil water, secondly prepare the cup, and so on.
Explanation, it is commonly used the passive voice in building the text. Explanation is such a scientific written material. It describes how certain phenomenon or event happen. How a tornado form, how tsunami works are the best example of explanation text. It uses passive pattern in describing the topic.

How do seasons happen?
Seasons come to us regularly. We have probably noticed that it gets warmer in summer or dry season while it get colder in the winter or wet season. However do we know how these seasons change?

Seasons happen and change every year. This happens because the earth tilts back and forth as it goes around the sun. During the summer, the earth tilts toward the sun. It makes half of the earth hotter. this condition is what we call summer. During the other half of the year, the earth tilts away from the sun. As a result, it makes that half of the earth cooler. This cool condition is then what we call winter.

The different parts of the world have the same season at different times. In the northern half of the world , winter happens during the months of December, January and February. The regions are such North America and Europe. In the other hand, the southern half of the world have winter during the months of June, July and August.The regions are like South America and Australia. How does this difference happen? The same season happens at different times because the top and bottom halves of the earth tilt away from the sun at different times.

A cell phone is a great gadget in this modern world. What is a cell phone? A cell phone is actually a radio in certain way. Like a radio, by a cell phone we can communicate to other people in real time. Million people use cell phone for their communication. Even nowadays, people use cell phones to communicate in voice, written and data. Alexander Graham Bell is the person who make great change in the way people communicate to each other. He invented a telephone in 1876. While wireless radio was formally known in 18994 presented by Guglielmo Marconi. By these two technologies, then a cell phone was born. However do you know how actually cell phones work?
This short explanation on how a cell phone work is really wonderful. A cell phone or in long term "cellular telephone' works by transmitting signals of radio to towers of cellular. The towers are networked to a central switching station. The connection usually uses wire, fiber optic-cables, or microwave.
Then the central switching station which handles calls in certain given area is directed connected to the wire-based telephone system. Cellulars are pick up by the towers and relayed to another cellular telephone user or the user of wire-based telephone network.
the towers vary in the capacity and capability to receive signals. Some can receive the signal from short distance and the others can receive more distance. However, there are usually more than one tower in certain given area so that the system can handle the increasing telephone traffic.

Explanation text in some way is similar to procedure text. Explanation passage often make description about how something happens or why the thing occures. While procedure text bring the instruction on how to make something happen completely. The following example of explanation text about how rain happen is best showing on what is explanation text, what is the purpose or social function of explanation text and how it differ from other text types. Explanation text often use technical terms related to the thing which is being explained. Explanation text is commonly compose in the mode of simple present tense.

How does Rain Happen?
Rain is the primary source of fresh water for most areas of the world, providing suitable conditions for diverse ecosystems, as well as water for hydroelectric power plants and crop irrigation.
The phenomenon of rain is actually a water circle. The concept of the water cycle involves the sun heating the Earth's surface water and causing the surface water to evaporate. The water vapor rises into the Earth's atmosphere. The water in the atmosphere cools and condenses into liquid droplets. The droplets grow until they are heavy and fall to the earth as precipitation which can be in the form of rain or snow.
However, not all rain reaches the surface. Some evaporates while falling through dry air. This is called virga, a phenomenon which is often seen in hot, dry desert regions.