The Telephone. Khaled

Transcription

1 The Telephone Khaled

2 Introduction The telephone is used to call people from far places. Over time it has changed from cellphone to smartphone. Picture of Martin Cooper holding the first cellphone. Picture from ebook Picture of smartphone made by Apple. Picture from ebook

3 The Cell Phone The cell phone looked like a colored box with a pin on the top. It worked by electric waves. You have to charge your telephone. It was created around 1970s by Dr. Martin Cooper. People s lives were changed in a positive way because they could call other people for help. People s lives were changed in a negative way because if they where calling someone when you are driving you could get in a crash.

4 The Smart Phone The smart phone looked like a rectangle with no wires. There is a touch screen. It worked by electricity. You can use the Internet on it. It was created around 1993 by the IBM company. People s lives were changed in a positive way because they could have fun. People s lives were changed in a negative way because they cost a lot of money.

5 My Opinion Overall, I think the change from the cell phone to the smart phone is positive because smart phones can let you see the news.

6 The Telescope Lila

7 Introduction The telescope is used for capturing images from far away like stars, constellations and planets. Over time it has changed from Galileo's design to Hubble's telescope. two of Galileo's telescopes Picture from ebook Hubble telescope Picture from ebook

8 Galileo s Telescope (Refracting) Galileo s Telescope looked like long tube with lenses, one was yellowish brownish and one was light chocolaty brown. It worked by collecting and concentrating light as it is broken in to different colors. It was created around 1609 by Galileo Galilei. People s lives were changed in a positive way because now they can see the sky better and it wasn t so blurry. People s lives were changed in a negative way because it was still very blurry but they could see.

9 Hubble Telescope (Space) The Hubble Telescope is 8 feet wide made with several computers. It looked like silver duct tape on a tube. It runs on solar panels and orbits around earth. Happily taking pictures of space. It was lunched on April 25, 1990 by NASA. People s lives were changed in a positive way because there was a problem on earth the made the lens bend the light and it caused to be blurry. It could take pictures of the sky with no problems. People s lives were changed in a negative way because they were afraid of the images they were seeing.

10 My Opinion Overall, I think the change from Galileo s to Hubble s is positive because its good that there s a telescope that is very good at modestly working.

11 Refrigerators Clemens

12 Introduction The refrigerator is used for keeping things cold that usually would rot away if it wasn t kept cold. Over time it has changed from the mechanical refrigerator to the energy efficient. Mechanical Refrigerator Picture from ebook Energy Efficient Picture from ebook

13 The Mechanical Refrigerator The mechanical refrigerator looked like a rectangle with legs, a smaller rectangle on top of the bigger rectangle and a door in the middle of the bigger rectangle. It worked by having a motor that used Freon (a chemical) to keep stuff cold. It was created around 1911 by Fred Wolf. People s lives were changed in a positive way because the mechanical refrigerator was colder than the ice box. The mechanical refrigerator was also better than the ice box because the ice box leaked a lot and the ice box didn t, it kept food cold in the summer which the ice box didn t do and people who built the refrigerator got jobs. People s lives were changed in a negative way because it had dangerous chemicals that made people sick, it broke a lot, people who made ice boxes lost their jobs and it used Freon which made holes in the ozone.

14 The Energy Efficient Refrigerator The energy efficient refrigerator looks like a big rectangle with two doors. It works by using recyclable parts which didn t use much energy to keep stuff cold. It was created around the 1990 s by scientists who didn t want to use much Freon. People s lives were changed in a positive way because it used less energy so you didn t have to pay much money, it made ice, it didn t make people sick, it had a light and it didn t use Freon that harmed the ozone. People s lives were changed in a negative way because the people who made Freon lost their jobs.

15 My Opinion Overall, I think the change from the mechanical refrigerator to the energy efficient refrigerator is positive because it made the world a better place, it didn t make people sick and it had a light.

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17 INTRODUCTION The refrigerator is used for keeping things cold and frozen. Over time it has changed from mechanical to energy efficient. This odd shape above me is a NOT earth friendly. It is a mechanical fridge. Picture from ebook Energy efficient fridge. Picture from ebook.

18 THE MECHANICAL REFRIGERATOR The mechanical refrigerator looked like a odd shape. It had four legs and a huge motor on top. It worked by energy and different chemicals that were extremely dangerous and NOT very earth friendly. It was created around 1900 s by Fred wolf. People s lives were changed in a positive way because with the mechanical refrigerator around you could freeze stuff in the summer. People s lives were changed in a negative way because all the poor ice men lost their jobs. If the mechanical refrigerator leaked you could get very injured if you were near it.

19 THE ENERGY EFFICIENT REFRIGERATOR The energy efficient refrigerator looks like a rectangle shape with no legs on the bottom. The energy efficient refrigerator did not have a motor. It works by having no chemicals. Water evaporates in the air and it makes things colder. It was created around the 1980s by refrigerator companies. People s lives were changed in a positive way because energy bills were down and it didn t make any noise at all. It took a lot of jobs to deliver the energy efficient refrigerator. That means that more people got money. People s lives were changed in a negative way because all the Fred Wolf workers lost there jobs and Fred Wolf would have to find another job quickly and now!

20 MY OPINION Overall, I think the change from the mechanical refrigerator to the energy efficient refrigerator is positive because the energy efficient refrigerator is much better for the environment and the mechanical refrigerator has a loud, crazy huge motor, but the energy efficient did not.

21 Refrigerators Thea

22 Introduction The refrigerator is used to keep food cool and to keep food from spoiling. Over time it has changed from an ice box to a mechanical refridgerator. This shows an ice box with a big block of ice in it. Picture from ebook. This shows a mechanical refridgerator. Picture from ebook.

23 The Ice Box The ice box looked like a big box with a cabinet on top. It worked by having big blocks of ice that were stored in the cabinet on top and twice a week an ice deliverer would deliver ice. The melted ice would drip into the drip pan below. It was created around 1900 by William Cullen, Michael Farady, John Goorie, and Thomas Moore. People s lives were changed in a positive way because there were jobs because someone needed to deliver ice and many people had to work for the companies that built ice boxes. People s lives were changed in a negative way because sometimes when you went to empty the drip pan it spilled.

24 The Mechanical Refrigerator The mechanical refrigerator looked like a big box with a tank on top. It worked by having the food stored in a cabinet and the cooling gas called freon that would filter down and keep the food cool. It was created around 1923 by Fred Wolf. People s lives were changed in a positive way because no one had to deliver ice and many people had to work for the companies that built them. People s lives were changed in a negative way because freon was bad for the environment, if freon leaked it could make people sick, ice deliverers lost their jobs, and some people couldn t afford it.

25 My Opinion Overall, I think the change from a ice box to a mechanical refrigerator is a positive and negative change because people gained and lost jobs and problems were fixed and made.

26 Refrigerators Ben

27 Introduction The refrigerator is used for keeping food cold. Over time it has changed from an icebox to a mechanical refrigerator. Icebox Picture from ebook Monitor top mechanical refrigerator Picture from ebook

28 The Ice Box The ice box looked like a wooden box with legs. It worked by ice cubes. It was created around the 1800 s by Thomas Moore. People s lives were changed in a positive way because they could make food cold in the summer. People s lives were changed in a negative way because the temperature didn t stay the same so sometimes it made food go bad.

29 The Mechanical Refrigerator The mechanical refrigerator looked like a battleship. It worked by a chemical called freon. It was created around 1923 by Fred Wolf. People s lives were changed in a positive way because the temperature stayed the same so food did not go bad and it kept food colder. People s lives were changed in a negative way because freon can damage the ozone layer.

30 My Opinion Overall, I think the change from the icebox to a mechanical refrigerator is good because it kept food colder so people didn t get sick.

31 The Camera Gabriel

32 Introduction The camera is used for taking pictures of you. Over time it has changed from film camera to digital camera. Film camera Picture from ebook. Digital camera Picture from ebook.

33 The Film Camera The film camera looked like a small box and a small refrigerator. It worked by taking pictures by clicking a button. It was created around 1900 by Eastman Kodak. People s lives were changed in a positive way because you don t have to sit of hours now you have to wait of one second. People s lives were changed in a negative way because it was expensive and it was big.

34 The Digital Camera The digital camera looks like a small box. It works by pressing a button. It was created around the 1990s by Steve Sasson. People s lives were changed in a positive way because the prices went down. The camera got smaller. It wasn t that expensive.

35 My Opinion Overall, I think the change from the film camera to the digital camera is positive because people took more pictures and it isn t really expensive.

36 Josie

37 Introduction The camera is used for taking pictures to remember fun things you did like at the beach. The pictures also help scientists study things on a camera. Over time it has changed from the film camera to the digital camera. This is a film camera. Picture from ebook. This is a digital camera. Picture from ebook

38 The Film Camera The film camera looked like a baby size shoe box but thinner. It worked by you pressing a button on the top of the camera and 6 hours later you get your picture. It was created around the 1990 s by Kodak. People s lives were changed in a positive way because you didn t need to wait hours to get your picture taken. People s lives were changed in a negative way because people spent too much money on film cameras and you had to wait for a long period of time before you could get your picture.

39 The Digital Camera The digital camera looks like a baby sized shoe box but smaller and thinner. It is about two inches wide. It works by you pressing a button and it takes a picture for you and you can take them to remember things you did somewhere. Scientists also take them and study the pictures. It was created around 1990 by Kodak. People s lives were changed in a positive way because they didn t need to wait weeks to get your picture printed out. With digital you get your picture in one second. People s lives were changed in a negative way because sometimes people take too many pictures and spend too much money on a digital camera.

40 My Opinion Overall, I think the change from film to digital is positive because with digital you see your pictures the second you take them.

41 The Camera Pascal

42 Introduction The camera is used for taking pictures of big events that you want to store in your memory. Over time it has changed from the daguerreotype to the film camera. Daguerreotype picture from ebook Film Camera picture from ebook

43 The Daguerreotype The daguerreotype looked like a rectangular prism with a button. It worked by clicking a button and taking a picture. It was created around 1840 by Louis Daguerre. People s lives were changed in a positive way because it helped people take pictures quickly instead of sitting for hours. People s lives were changed in a negative way because it took black and white images only, it was expensive, and people had to sit for 6 minutes.

44 The Film Camera The film camera looked like a small mail box. It worked by pressing a button. Then the shutter opens and takes a picture. It was created around 1900 by Eastman Kodak. People s lives were changed in a positive way because it was in white and black but eventually in color too, and it was inexpensive. People s lives were changed in a negative way because film needed to be developed into a picture and you needed to buy film.

45 My Opinion Overall, I think the change from daguerrotype to the film camera is positive because the film camera is not expensive.

46 The Camera Charlie

47 Introduction The camera is used for taking pictures of events. Over time it has changed from a daguerreotype to a film camera. Daguerreotype Picture from ebook Film Camara Picture from ebook

48 The Daguerreotype The daguerreotype looked like a square that is big. It worked by putting a picture on a copper sheet. It was created around 1840 by Louis Daguerre. People s lives were changed in a positive way because they didn t have to wait for 3 hours while getting their picture painted. It only took six minutes. People s lives were changed in a negative way because it was a lot of money.

49 The Film Camera The film camera looked like a little square with a circle. It worked when the camera shutter opened and closed a picture goes on the special light-sensitive paper. It was created around 1900 by Eastman Kodak Company. People s lives were changed in a positive way because you just had to click a button to take the picture. People s lives were changed in a negative way because you have to go to the store to print their pictures.

50 My Opinion Overall, I think the change from dagurerreotype to film camera is positive because it is not a lot of money and film cameras you just click a button and it takes the picture right away. With film cameras you can get lots of pictures.

51 The Light Bulb Evelyn

52 Introduction The light bulb is used for making light in the dark. Over time it has changed from light bulb to CFL. Light Bulb Picture from ebook CFL Picture from ebook

53 The Invention of the Light Bulb The light bulb looked like a bright round bulb. It worked when the coil would charge together and fuse switch would light up the bulb. It was created around 1879 by Thomas Edison. People s lives were changed in a positive way because it is brighter and safer. People s lives were changed in a negative way because you pay a lot of money.

54 Compact Florescent Light Bulbs (CFLs) CFLs look like a bright light and a twisty bulb. There was not filament. They worked by a special coil in a CFL that gets very hot and glows when electricity runs through it. They were created around 1976 by Edward Hammer. People s lives were changed in a positive way because they are brighter and safer. People s lives were changed in a negative way because they are expensive.

55 My Opinion Overall, I think the change from light bulb to CFL is positive because it works good. There better light bulbs. If it is dark in your house, you can play when its getting dark because you have the CFL.

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57 INTRODUCTION The light bulb is used for making light in the dark. Over time it has changed from light bulb to CFL. Light bulb Picture from ebook Picture from ebook CFL

58 THE INVENTION OF THE LIGHT BULB The light bulb looked like a bright round bulb. It worked when the coil heats up inside it glows It was created around 1879 by Thomas Edison People s lives were changed in a positive way because a candle can burn down your house. People s lives were changed in a negative way because it uses a lot of electricity.

59 COMPACT FLORESCENT LIGHT BULBS (CFLS) CFLs look like a round bulb that glow s. They worked when coil heats up. They were created around 1976 by Edward hammer People s lives were changed in a positive way because the CFL doesn t uses a lot of electricity. People s lives were changed in a negative way because it still uses electricity.

60 MY OPINION Overall, I think the change from light bulb to CFL is a positive way because it dos not use a lot of electricity.

61 The Light Bulb Moise

62 Introduction The light bulb is used for light to see in the dark. Over time it has changed from light bulb to CFL. light bulb Picture from ebook CFL Picture from ebook

63 The Invention of the Light Bulb The light bulb looked round with a Metal bottom. It worked by the coil heats up inside to glow. It was created around 1879 by Thomas Edison. People s lives were changed in a positive way because the light was bright and safer. People s lives were changed in a negative way because the light can brake.

64 Compact Florescent Light Bulbs (CFLs) CFLs look very bright. They worked by electricity flowing through the gas inside. They were created around 1976 by Edward Hammer. People s lives were changed in a positive way because you can save money and it creates new jobs. It helps everyone see in the dark. People s lives were changed in a negative way because the light is really bright.

65 My Opinion Overall, I think the change from _ to _ is (positive or negative) because it is so bright! It is safer. My CFL can turn off after 20 minutes.

66 The Light Bulb Ravindu

67 Introduction The light bulb is used for people to see in the dark. Over time it has changed from light bulb to CFL. Light bulb Picture from ebook Cfl Picture from ebook

68 The Invention of the Light Bulb The light bulb looked round and bright. It worked by electricity. There is a coil inside that lights up. It was created around 1879 by Thomas Edison. People s lives were changed in a positive way because Thomas Edison made a bright light bulb then the people can see in the dark. People s lives were changed in a negative way because the light bulb change in to the CFL and it is brighter but people don t light it.

69 Compact Florescent Light Bulbs (CFLs) CFLs look like round glass with a metal bottom. They worked by electricity. They were created around 1976 by Thomas Edison. People s lives were changed in a positive way because they last longer. People s lives were changed in a negative way because it is expensive.

70 My Opinion Overall, I think the change from light bulb to CFL is positive because the CFLis bright and the light bulb is not bright.

71 The Light Bulb Dante

72 Introduction The light bulb is used for looking in the dark. Over time it has changed from light bulb to CFL. Light Bulb Picture from ebook CFL Picture from ebook

73 The Invention of the Light Bulb The light bulb looked round with a metal bottom. It worked by electricity. The coil heats up inside to glow. It was created around 1879 by Thomas Edison. People s lives were changed in a positive way because when there was no light bulbs the people couldn t see in the dark and they had to sleep with candles. People s lives were changed in a negative way because light bulbs can break. It can make a fire.

74 Compact Florescent Light Bulbs (CFLs) CFLs looked very bright. They worked when those metals get very hot. They were created around 1976 by Edward Hammer. He was an engineer at G.E. People s lives were changed in a positive way because it saved more energy. They last longer so we save money. People s lives were changed in a negative way because the gas inside is very dangerous for people.

75 My Opinion Overall, I think the change from the light bulb to CFL is positive because it s brighter than light bulbs and everybody saves more money.

76 The Telephone Luisa

77 Introduction The telephone is used for talking to friends. Over time it has changed from invention of the telephone to cordless. First telephone Picture from ebook Cordless Telephone Picture from ebook

78 The First Telephone The first telephone looked like a bell it has a wire thing,a horn, and a handle. It worked by winding the wire and then the horn rang. It was created around 1876 it was created by Alexander Graham Bell. People s lives were changed in a positive way because you could talk to friends on the phone and you don`t have to travel a long way to see your friends. People s lives were changed in a negative way because electricity was running out because the invention toke a lots of electricity

79 The Cordless Telephone The cordless telephone looked like it has buttons that have number on it. Ti has a screen. It worked by radio waves. It was created around 1969 by George Sweigert. People s lives were changed in a positive way because you could bring the phone where ever you want. People s lives were changed in a negative way because if you were talking on the phone when you are driving you might get in a car accident.

80 My Opinion Overall, I think the change from invention of the telephone to cordless is positive because it costs less money.

81 Michael

82 The telephone is used for talking from far away in the other state and country. Over time it has changed from cell phone to smart phone. Cell Phone Picture from ebook Smart Phone Picture from ebook

83 The cell phone looked like a telephone that has numbers to 9. It worked by the thing that travel the wireless threw the air It was created around 1973 by Dr. Martin Cooper. People s lives were changed in a positive way because they like talking on the telephone because it s easy to talk a telephone than ride a car. People s lives were changed in a negative way because they need to go to the store and by the telephone by too much money.

84 The smart phone looked like a square phone with an easy touch on it. It worked by the thing that sends wireless threw the air. It was created around (date) by (person) People s lives were changed in a positive way because People s lives were changed in a negative way because

85 Overall, I think the change from cell phone to smart phone is positive because it s easy for people to touch screen easy.

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87 INTRODUCTION The telephone is used for talking to other people that are far away from you Over time it has changed from a phone with a cord to a cordless phone Phone with a cord Picture from ebook Smart Phone Picture from ebook

88 THE FIRST TELEPHONE The first telephone looked like a rectangle with buttons. It worked by electrical waves setting off electrical signals. It was created around 1973 by Dr. Martin Cooper. People s lives were changed in a positive way because they could communicate better. And people can communicate better. People s lives were changed in a negative way because if someone uses to. Much electricity

89 THE SMART PHONE The smart phone looked like odd phone It worked by electrical signals It was created around 2008 by Dr.Martin cooper People s lives were changed in a positive way because take it any where People s lives were changed in a negative way because pay to much attention

90 MY OPINION Overall, I think the change from phone with a cord to smart phone is positive because its easy to use.

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92 INTRODUCTION The telephone is used for calling people far away so you don t have to get the person that you want to talk to. Over time it has changed from cellphone to smartphone. Picture of the first cellphone with Martin Cooper. Picture from e-book. Picture of smartphone made by Apple. Picture from e-book.

93 THE CELL PHONE The cell phone looked like a colored box with a line and a pin on the top. It worked by calling people that you want to call. It was created around 1973 by Dr.Martin Cooper. People s lives were changed in a positive way because it could help people with work. People s lives were changed in a negative way because when you are driving And you texting someone you could get in a crash.

94 THE SMART PHONE The smart phone looked like It worked by calling people far away. It was created around 2007 by Apple. People s lives were changed in a positive way because it could help you with your work. People s lives were changed in a negative way because you could get in a crash.

95 MY OPINION Overall, I think the change from cellphone to smartphone is positive because it could help you with a lot of things like with your work so it would be easy. That s my opinion.

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97 INTRODUCTION The telephone is used for talking to your friends. Over time it has changed from cell phone to smart phone. Cell phone Picture from ebook Smart Phone Picture from ebook

98 THE CELL PHONE The cell phone looked like a big phone with an antenna and numbers on buttons. It worked by radio waves and no cord. It was created around 1970s by Dr. Martin Cooper. People s lives were changed in a positive way because you can bring the cell phone in your car. People s lives were changed in a negative way because you could get in a car crash very easily by talking to your friends. But you should really be focusing.

99 THE SMART PHONE The smart phone looked like a phone with a touch screen. It worked by radio waves It was created around 2007 by IBM SIMON. People s lives were changed in a positive way because now they are not big and heavy. People s lives were changed in a negative way because now you have to charge phones.

100 MY OPINION Overall, I think the change from cell phone to smart phone is positive change because now you can talk to your friends a lot easier.

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102 INTRODUCTION The telescope is used for seeing images from far away. Over time it has changed from Newton s telescope to Hubble s telescope. This is Newton s telescope. Picture from ebook. This is Hubble s telescope. Picture from ebook.

103 NEWTON S TELESCOPE (REFLECTING) The telescope looked like a long pipe with two holes. At the end of the long pipe there are two pieces of glasses that you can see threw and you can see the night sky. It worked by when you see through the two lenses you could see from where you are standing right now to the far night sky because of the circular clear lens. It was created around 1668 by Sir Isaac Newton. People s lives were changed in a positive way because they could see great things in the sky from far away when they wanted such as tiny stars, the beautiful moon, constellations and planets. People s lives were changed in a negative way because when they looked through the telescope it was way to bright so the people got really scared.

104 HUBBLE TELESCOPE (SPACE) The telescope looked a recording,fat big machine that is 8 feet wide and it is in outer space. It also is a big reflecting telescope that has several expensive computers with green and red buttons. It worked by when you sent the fragile Hubble telescope to space it would capture clear images for scientists. It was launched on April 25, 1990 by N.A.S.A. People s lives were changed in a positive way because they could see what was great in outer space and what was going bad in outer space. People s lives were changed in a negative way because if it broke, nobody could look in space with the Hubble telescope anymore because it was expensive, hard to fix, and it wouldn t last forever.

105 MY OPINION Overall, I think the change from Newton s Telescope to the Hubble Telescope is positive because you could see more clear images in the beautiful night sky.

106 The Telescope Zachariah

107 Introduction The telescope is used for studying stars and other bodies in outer space. Over time it has changed from Galileo s telescope to the Hubble telescope. These are Galileo s telescopes. One big one small. Picture from ebook. This is the Hubble telescope. It was made by NASA. Picture from ebook.

108 Galileo s Telescope (Refracting) Galileo s telescope was 36.5 inches. It is refracting. It worked by two disk-shaped lens that curved on both sides. It was created around 1600 s by Galileo. People s lives were changed in a positive way because now people know way more about our stars, planets and galaxy. People s lives were changed in a negative way because it sometimes gave blurry images.

109 Hubble Telescope (Space) The Hubble telescope looked big, long and the mirror was 94.5 inches. It worked by recording images in space. It was created around the 1990 s by a company called NASA. People s lives were changed in a positive way because it didn t usually take bad pictures and because it orbits around Earth s atmosphere. People s lives were changed in a negative way because NASA had to rebuild the Hubble telescope because the primary mirror was made wrong.

110 My Opinion Overall, I think the change from the Galileo s telescope to the Hubble telescope is a positive change because the Hubble telescope took better pictures.

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112 INTRODUCTION The telescope is used for seeing stars and constellations. Over time it has changed from Newton telescope to Hubble telescope. Newton s telescope. Picture from ebook Hubble telescope. Picture from ebook

113 NEWTON S TELESCOPE (REFLECTING) The telescope looked like a big thick tube with an eye piece at the front and a piece of glass at the end. It worked by mirrors so the light could bounce off the mirrors. It was created around 1668 by by Newton. People s lives were changed in a positive way because they could see constellations and planets and stars. People s lives were changed in a negative way because they were scared of it because they thought the moon was flat but it was round.

114 HUBBLE TELESCOPE (SPACE) The Hubble Telescope looked like a kaleidoscope with a wheel at the bottom. It worked by using satellites and computers. The computers were used for taking images. It was launched on April 25, 1990 by N.A.S.A. People s lives were changed in a positive way because they could see things in space more clearly. People s lives were changed in a negative way because the first time it was launched the images were blurry. The telescope is expensive and hard to fix.

115 MY OPINION Overall, I think the change from Newton s telescope to the Hubble telescope is positive because we can see images far away and it is not blurry at all.

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117 INTRODUCTION The telescope is used for seeing images far away Over time it has changed from Newton to Hubble. Newton s telescope Picture from ebook Hubble telescope Picture from ebook

118 NEWTON S TELESCOPE (REFLECTING) The telescope looked like a thick cylinder with a eye piece. It worked because the light bounced on a mirror and it bounces on another mirror so you can see. It was created around 1668 by Sir Isaac Newton. People s lives were changed in a positive way because they could see stuff far away better. People s lives were changed in a negative way because they were scared of it.

119 HUBBLE TELESCOPE (SPACE) The telescope looked like kaleidoscope with a wheel at the bottom. It worked by recording images using satellites. It was April 25, 1990 by N.A.S.A. People s lives were changed in a positive way because they could see images in space more clearly. People s lives were changed in a negative way because the first time it was blurry but then they fixed it.

120 MY OPINION Overall, I think the change from Newton s Telescope to the Hubble telescope is wonderful because you could see stuff less blurry.

121 Refrigerators Kendall

122 Introduction The refrigerator is used for keeping food cool. Over time it has changed from the ice box to the mechanical refrigerator. Ice box. Picture from ebook Mechanical with motor. Picture from ebook

123 The Ice Box The ice box looked like a big box with cabinets on the front. It worked by a big block/cube of ice. It was created around 1800 s by Dr. William Cullen. People s lives were changed in a positive way because now you can freeze stuff in the winter. People s lives were changed in a negative way because the drip pan spilled a lot. Refrigerators now are very expensive.

124 The Mechanical Refrigerator The mechanical refrigerator looked like a big white box with a motor on top that looked like a steering wheel. It worked by the big motor. It was created around the 1900 s by Fred Wolf. People s lives were changed in a positive way because before people could get very sick because the ice cube could melt and the food could get spoiled. People s lives were changed in a negative way because there was dangerous, bad and weird chemicals inside.

125 My Opinion Overall, I think the change from the ice box to the mechanical refrigerator is negative because in the mechanical refrigerator the chemicals could spill and people could get sick from eating the food.