How a Spider’s Web Forms
General Statement : A Spider web looks delicate but it is very strong. It can hold 4000 times a spider’s weight. But how does it form.
Explanation : First the spider spins a thread of silk. The thread gets blown over to a branch by teh wind. Then she makes another two threads and makes a Y shape. Next she makes more threads and they look like spokes off a wheel. Then the spider goes in a spiral, out and back in, sits in the middle and waits for food.Closing : This is how a web is formed.
contoh II :
Venus Flytrap
The Venus Flytrap is an extraordinary plant. It is a carnivorous (flesh eating) plant which can digest flies and other insects.
When the ‘trap’ is open, it looks like a large seashell with sharp, spiky ‘teeth’. It has bright colours and a beautiful scent.Insects are attracted to the plant because of its vibrant colours and its sweet-scented nectar. The insects land on small ‘trigger’ hairs of the trap and this pressure causes the trap to close. If the insect is too small, the chamber will not close, because there is not enough pressure. Once the trap has swallowed an insect it takes ten days to diggest it.
The Venus Flytrap prefers tropical weather and so it is found in places like South America. It is often used by people to catch the annoying insects that fly around their houses. In my opinion it’s very useful plant!
contoh III :
The Picher of Death
You may have heard of a plant called the Picher of Death. As you can probably tell by its name, it kills and eats insects. If you want to know how, read on!
To catch flies and other insects, this plant needs a bait and a trap. The bait in this case in nectar. The trap is the cup or ‘pitcher’ shaped leaves which have short hairs at the top to give the insect a sure foothold, but slippery hairs pointing downwards, so it can’t escape once it falls in. the other part of the trap is a digestive fluid inside the cup.
How it catches the insect is really quite simple. First the insect is attracted by the nectar. Then it slips on the smooth inner surface of the plant. Next it is forced downwards by the slippery hairs. Then it falls into the digestive fluid and is drowned.
An interesting fact about this plant is that the pitcher leaves can grow to the size of a fully grown adult’s hand.
Contoh IV :
Have you ever heard about pipeline in computer technology? Guess what. Right. Pipeline is very close to computer. But can you tell me what pipeline is? Well, let me explain. Pipeline in computer is a sequence of stages a computer (uses, chooses, processes) to carry out instructions.
The CPU makes sure every stage in a pipeline is always (doing~ working, operating) on an instruction. As a stage of a pipeline in the CPU (finishes, separates, deletes) manipulating an instruction, it (keeps, hands, works) its instruction to the next stage and gets another instruction from the stage before it, (running, moving, stopping) several instructions along the pipeline simultaneously. This process is more efficient than it would be if each instruction had to start at the first stage after the previous instruction finished the final stage. Oh, I almost forgot the more pipelines a CPU has, the faster it can (execute, cut, link) instructions. A CPU with two or more pipelines is said to be super pipelined or super scalar. Okay. Have you got it? Not yet. How about (going, visiting, playing) to the ~ library and (searching, discovering, finding) more explanation about ~ pipeline? See you and good luck.
contoh V :
TSUNAMI
Tsunami is a Japanese word, meaning, “harbor wave” and is used as the scientific term for a seismic sea wave generated by an undersea earthquake or possibly an undersea. Landslide or volcanic eruption. When the ocean floor is tilted or offset during an earthquake, a set of waves is created similar to the concentric waves generated by an object dropped into the water. Most tsunamis originate along the Ring of Fire, a zone of volcanoes and seismic activity, 32,500 km (24,000 ml) long that encircles the Pacific Ocean. Since 1819, about 40 tsunamis have struck the Hawaiian Islands.
A tsunami can have wavelengths or widths of 100 to 200 km (60 to 120 ml), and may travel hundreds of kilometres across the deep ocean, reaching Encarta Encyclopedia speeds of about 725 to 800 km/h (about 450 to 500 mph). Upon entering shallow coastal waters, the wave, which may have been only about half a meter (a foot or two) high out at sea, suddenly grows rapidly. When the wave reaches the shore, it may be 15 m (50 ft) high or more. Tsunamis have tremendous energy because of the great volume of water affected. They are capable of obliterating coastal settlements.
Tsunamis should not be confused with storm surges, which are domes of water that rise underneath hurricanes or cyclones and cause extensive coastal flooding when the storms reach land. Storm surges are particularly devastating if they occur at high tide. A cyclone and accompanying storm surge killed an estimated 500,000 people in Bangladesh in 1970.
Tsunami is a Japanese word, meaning, “harbor wave” and is used as the scientific term for a seismic sea wave generated by an undersea earthquake or possibly an undersea. Landslide or volcanic eruption. When the ocean floor is tilted or offset during an earthquake, a set of waves is created similar to the concentric waves generated by an object dropped into the water. Most tsunamis originate along the Ring of Fire, a zone of volcanoes and seismic activity, 32,500 km (24,000 ml) long that encircles the Pacific Ocean. Since 1819, about 40 tsunamis have struck the Hawaiian Islands.
A tsunami can have wavelengths or widths of 100 to 200 km (60 to 120 ml), and may travel hundreds of kilometres across the deep ocean, reaching Encarta Encyclopedia speeds of about 725 to 800 km/h (about 450 to 500 mph). Upon entering shallow coastal waters, the wave, which may have been only about half a meter (a foot or two) high out at sea, suddenly grows rapidly. When the wave reaches the shore, it may be 15 m (50 ft) high or more. Tsunamis have tremendous energy because of the great volume of water affected. They are capable of obliterating coastal settlements.
Tsunamis should not be confused with storm surges, which are domes of water that rise underneath hurricanes or cyclones and cause extensive coastal flooding when the storms reach land. Storm surges are particularly devastating if they occur at high tide. A cyclone and accompanying storm surge killed an estimated 500,000 people in Bangladesh in 1970.
contoh VI :
PETROLEUM PRODUCT
Petroleum products, such as gasoline, kerosene, home heating oil, residual fuel oil and lubricating oils, come from one source - crude oil found below the earth’s surface, as well as under large bodies of water, from a few hundred feet below the surface to as deep as 25,000 feet into the earth’s interior. Sometimes crude oil is secured by drilling a hole through the earth, but more dry holes are drilled than those producing oil. Pressure at the source or pumping forces crude oil to the surface.
Crude oil welts flow at varying rates, from ten to thousands of barrels per hour. Petroleum products vary greatly in physical appearance: thin, thick, transparent, or opaque. Their chemical composition is made up of only two elements: carbon and hydrogen, which form compounds called hydrocarbons. Other chemical elements found in union with the hydrocarbons are few and are classified as impurities. Trace elements are also found, but these are of such minute quantities that they are disregarded. The combination of carbon and hydrogen forms many thousands of compounds, which are possible because of the various positions, and varied joining of these two atoms in the hydrocarbon molecule.
The various petroleum products are refined from the crude oil by heating and condensing the vapours. These products are the so-chatted tight oils, such as gasoline, kerosene and distillate oil. The residue remaining after the tight oils are distilled is known as heavy or residual fuel oil and is used mostly for burning under boilers. Additional complicated refining processes rearrange the chemical structure of the hydrocarbons to produce other products, some of which are used to upgrade and increase the octane rating of various types of gasoline.
Petroleum products, such as gasoline, kerosene, home heating oil, residual fuel oil and lubricating oils, come from one source - crude oil found below the earth’s surface, as well as under large bodies of water, from a few hundred feet below the surface to as deep as 25,000 feet into the earth’s interior. Sometimes crude oil is secured by drilling a hole through the earth, but more dry holes are drilled than those producing oil. Pressure at the source or pumping forces crude oil to the surface.
Crude oil welts flow at varying rates, from ten to thousands of barrels per hour. Petroleum products vary greatly in physical appearance: thin, thick, transparent, or opaque. Their chemical composition is made up of only two elements: carbon and hydrogen, which form compounds called hydrocarbons. Other chemical elements found in union with the hydrocarbons are few and are classified as impurities. Trace elements are also found, but these are of such minute quantities that they are disregarded. The combination of carbon and hydrogen forms many thousands of compounds, which are possible because of the various positions, and varied joining of these two atoms in the hydrocarbon molecule.
The various petroleum products are refined from the crude oil by heating and condensing the vapours. These products are the so-chatted tight oils, such as gasoline, kerosene and distillate oil. The residue remaining after the tight oils are distilled is known as heavy or residual fuel oil and is used mostly for burning under boilers. Additional complicated refining processes rearrange the chemical structure of the hydrocarbons to produce other products, some of which are used to upgrade and increase the octane rating of various types of gasoline.
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