╨╧рб▒с;■  ■                                                                                                                                                                                                                                                                                                                                                                                                                                                   ¤    ■    ■   ■   ■                                                                                                                                                                                                                                                                                                                                                                                                                                   Root Entry         └FЖ!√╢╗~║@CompObj            bWordDocument         ЧObjectPool    ЖЇ╔╡╗~║ЖЇ╔╡╗~║■                                                                                                                                                                                                                               :;<=>?@ABCD■                                                                                                                                                                                                                                               ■       └FMicrosoft Word 6.0 Document MSWordDocWord.Document.6;■  ■                                                                                                                                                                                                                                                                                                                                                                                   ╟F■НЖь■PWЪ(QяЛ°WV v ЪfQяРш╙■ vWV v jЪрvя └uщГWV v Ъ@xя └tMГ~t?WVЪRU └tРшб■Л▀┴у─Я& wNРшc ╟F■ы2РшГ■WV v НЖйPeter Chi Models PD 3 There are many things that cannot be taught or understood without the use of models. Models are replicas of the original, but can be modified to fit the needs. For instance, an airplane can be made smaller to show how parts of it work, or an atom can be made larger to show scientistsТ perception of it in detail. There are things that happen too fast, like a hummingbirdТs wings which can be slowed down to show what happens, or things that happen too slowly, like erosion, can be noticeable if it is sped up. There two types of models: scale models and theoretical models. A scale model is one that follows a ratio and can be made very precise. Examples of this are model airplanes, cars, dollhouses, or anything else that can be physically percepted in the real world. A theoretical model is one that is not known what it is exactly; a good example that is stressed on in the reading is an atom. No one knows for sure what an atom looks like. Most models of atoms are made of balls and sticks, but that doesnТt mean a scientist really thinks an atom is made of balls and sticks. A model of an atom changes over time as more is learned about it, as is every theoretical model. The point of this is that both models are important. Scale models show detail or are made smaller to be handled easier, etc., and theoretical models show what the researchers believe their thing looks like. If you tried to fly a model airplane with the same engine that a real airplane uses, even if the model was made of the same material and was exactly the same except for size, it wouldnТt work. Obviously, because the original engine wouldnТt fit in a model airplane. Even if you scaled the engine down to size, it still wouldnТt work for reasons stated in the reading: If the model was 1/10 the length, it would have 1/100 the wing area, but 1/1000 the weight. The engine would be too powerful. Many other properties could be changed, if the model wasnТt made of the exact material. It might react differently to heat or cold; the boiling point might be different or it might melt at a different temperature. However, models help a lot if you keep their use in perspective. A map is a model that shows you where to go. It can be made big or small, but it is a lot easier to show the area on a map down to scale than a map in real size, or on the real world. Since no one has actually seen an atom, it would be impossible to show one. Therefore, scientists must make models of them if they want to show what an atom looks like, or what they believe one looks like. All models have their uses, whether it be to show something is slow motion, or fast motion to be fitted with peoplesТ attention span, or to show an idea physically. Ял╨╧рб▒■  рЕЯЄ∙OhлС+'│┘0░Ш▄$ H l Р┤╪ № D hМ                                (C:\MSOFFICE\WINWORD\TEMPLATE\NORMAL.DOT Peter Chi Cecilia Chi Cecilia Chi@Ж█7У╗~║@SummaryInformation(            9р                                    @Ж█7У╗~║@Microsoft Word 6.01╨╧рб▒с;■                                                                                                                                                                                                  ▄еe3└ e│ Ч│ jjjjjjjФФФФФФ Ю Ф▀1ииииииии╘╓╓╓їf[f┴Td3▀jиииии▀иjjииииииjиjи╘~Жjjjjи╘и,иPeter Chi Models PD 3 There are many things that cannot be taught or understood without the use of models. Models are replicas of the original, but can be modified to fit the needs. For instance, an airplane can be made smaller to show how parts of it work, or an atom can be made larger to show scientistsТ perception of it in detail. There are things that happen too fast, like a hummingbirdТs wings which can be slowed down to show what happens, or things that happen too slowly, like erosion, can be noticeable if it is sped up. There two types of models: scale models and theoretical models. A scale model is one that follows a ratio and can be made very precise. Examples of this are model airplanes, cars, dollhouses, or anything else that can be physically percepted in the real world. A theoretical model is one that is not known what it is exactly; a good example that is stressed on in the reading is an atom. No one knows for sure what an atom looks like. Most models of atoms are made of balls and sticks, but that doesnТt mean a scientist really thinks an atom is made of balls and sticks. A model of an atom changes over time as more is learned about it, as is every theoretical model. The point of this is that both models are important. Scale models show detail or are made smaller to be handled easier, etc., and theoretical models show what the researchers believe their thing looks like. If you tried to fly a model airplane with the same engine that a real airplane uses, even if the model was made of the same material and was exactly the same except for size, it wouldnТt work. Obviously, because the original engine wouldnТt fit in a model airplane. Even if you scaled the engine down to size, it still wouldnТt work for reasons stated in the reading: If the model was 1/10 the length, it would have 1/100 the wing area, but 1/1000 the weight. The engine would be too powerful. Many other properties could be changed, if the model wasnТt made of the exact material. It might react differently to heat or cold; the boiling point might be different or it might melt at a different temperature. However, models help a lot if you keep their use in perspective. A map is a model that shows you where to go. It can be made big or small, but it is a lot easier to show the area on a map down to scale than a map in real size, or on the real world. Since no one has actually seen an atom, it would be impossible to show one. Therefore, scientists must make models of them if they want to show what an atom looks like, or what they believe one looks like. All models have their uses, whether it be to show something is slow motion, or fast motion to be fitted with peoplesТ attention span, or to show an idea physically. Яле vНF╚PЪqйW─^°&Л@t Ht-Huщыщo&╟ vhЪйW vhjjjЪшиWщ▓ │ ║ ¤√uc В│ ¤└!¤└!¤└!ў└!Аў└!АhK@ё Normala "A@Є б"Default Paragraph Font│ │        │ ║ │ , Cecilia ChiC:\MSOFFICE\WINWORD\MODEL.DOC @Epson Stylus 800+LPT1:epepstEpson Stylus 800+ D"'hhEpson Stylus 800+ D"'hhА▓ ▓ {{▓ ▓ 1РTimes New Roman РSymbol &РArial"М╨huK∙┼uK∙┼Г$3 Peter Chi Cecilia Chi Cecilia Chi╨╧рб▒с;■  ■