tag:blogger.com,1999:blog-31142777969492599262024-03-04T22:52:33.491-08:00Scienceworkplace class VIIIAnju pal , Scienceworkplacehttp://www.blogger.com/profile/00853658392241412635noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-3114277796949259926.post-42659982365669063732015-10-24T22:26:00.000-07:002015-10-24T22:32:14.577-07:00Coal and Petrolleum<div dir="ltr" style="text-align: left;" trbidi="on">
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Anju pal , Scienceworkplacehttp://www.blogger.com/profile/00853658392241412635noreply@blogger.com0tag:blogger.com,1999:blog-3114277796949259926.post-33266808650434812312015-10-22T09:06:00.000-07:002020-04-02T12:27:40.510-07:00Reaching the age of adolescence<div dir="ltr" style="text-align: left;" trbidi="on">
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<li>Reaching the age of adolescence</li>
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Anju pal , Scienceworkplacehttp://www.blogger.com/profile/00853658392241412635noreply@blogger.com0tag:blogger.com,1999:blog-3114277796949259926.post-2833503790547634392015-10-22T08:34:00.005-07:002020-04-02T12:28:15.369-07:00Reproduction<div dir="ltr" style="text-align: left;" trbidi="on">
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<li><b>Reproduction in Animals</b></li>
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<a href="https://www.scribd.com/doc/286466618/Reproduction-in-Animals-notes-for-class-8">NOTES</a><br />
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<a href="http://www.excellup.com/ClassEight/scienceight/reproductioneightQ.aspx">Assignment 1</a>, <a href="http://www.softschools.com/quizzes/science/animal_reproduction/quiz924.html">Quiz 1</a> , <a href="http://www.proprofs.com/quiz-school/story.php?title=class-8-biology-animal-reproduction-sample">Quiz 2</a></div>
Anju pal , Scienceworkplacehttp://www.blogger.com/profile/00853658392241412635noreply@blogger.com0tag:blogger.com,1999:blog-3114277796949259926.post-75037782818229935182015-07-31T06:15:00.005-07:002020-04-23T03:31:11.049-07:00Metals and non-metals<div dir="ltr" style="text-align: left;" trbidi="on"><br /></div><div dir="ltr" style="text-align: left;" trbidi="on"><br /></div><div dir="ltr" style="text-align: left;" trbidi="on"><br /></div><div dir="ltr" style="text-align: left;" trbidi="on"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwPX5_yovDHvmTaA4VXnpTXgqzZg3FYOXjVYpI30r8QGdV_a4KvYZJqTn8Esq008PjeZzhLLQajC9127Fa0ud1cbrbe6gK-kI0L-Rt0jouSRsO_Q2mpFctzQ5Kxbt-EQIiFeRfHV5bCC4/" style="margin-left: 1em; margin-right: 1em; text-align: center;"><img border="0" data-original-height="1280" data-original-width="933" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwPX5_yovDHvmTaA4VXnpTXgqzZg3FYOXjVYpI30r8QGdV_a4KvYZJqTn8Esq008PjeZzhLLQajC9127Fa0ud1cbrbe6gK-kI0L-Rt0jouSRsO_Q2mpFctzQ5Kxbt-EQIiFeRfHV5bCC4/w349-h480/Mind+mapping+%252C+Metals+viii.jpg" title="Mind- map" width="349" /></a><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg6uiB9_m9eg-mMJ6EuTba7i3DyRQmZG7QLHZ-HKb2q7laVNjak0vc44l5_JWUIsWA1ePtelTeNhvLcJftyv2nkWzUN2kWr9LApfq9djVT5ZLisvJU1pyRBgu3fO1xAPMdRClb5Y15j264/" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1280" data-original-width="1004" height="480" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg6uiB9_m9eg-mMJ6EuTba7i3DyRQmZG7QLHZ-HKb2q7laVNjak0vc44l5_JWUIsWA1ePtelTeNhvLcJftyv2nkWzUN2kWr9LApfq9djVT5ZLisvJU1pyRBgu3fO1xAPMdRClb5Y15j264/w377-h480/Mind+mapping%252C+Non-+metals+viii.jpg" width="377" /></a></div></div><div dir="ltr" style="text-align: left;" trbidi="on"><br /></div><div dir="ltr" style="text-align: left;" trbidi="on"><br /></div><div dir="ltr" style="text-align: left;" trbidi="on"><br /></div><div dir="ltr" style="text-align: left;" trbidi="on"><br /></div><div dir="ltr" style="text-align: left;" trbidi="on">REFERENCE: NCERT </div><div dir="ltr" style="text-align: left;" trbidi="on"><br /></div><div dir="ltr" style="text-align: left;" trbidi="on">
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<b>Metals and non-metals</b></h2>
<span style="background-color: white; color: blue;"><span style="font-family: sans-serif; font-size: 14px; line-height: 22.4px;">The </span>chemical elements<span style="font-family: sans-serif; font-size: 14px; line-height: 22.4px;"> can be broadly divided into </span>metals<span style="font-family: sans-serif; font-size: 14px; line-height: 22.4px;">, </span>metalloids<span style="font-family: sans-serif; font-size: 14px; line-height: 22.4px;"> and </span>nonmetals<span style="font-family: sans-serif; font-size: 14px; line-height: 22.4px;"> according to their shared </span>physical<span style="font-family: sans-serif; font-size: 14px; line-height: 22.4px;"> and </span>chemical properties<span style="font-family: sans-serif; font-size: 14px; line-height: 22.4px;">.</span></span></div><div dir="ltr" style="text-align: left;" trbidi="on"><font color="#0000ff" face="sans-serif"><span style="font-size: 14px;"><br /></span></font>
<span style="background-color: blue;"><br /></span><b>ACTIVITY</b>: Prepare Index Cards for any four metals and four non-metals. The card should have information like name of metal/non-metal; its</div><div dir="ltr" style="text-align: left;" trbidi="on"><div dir="ltr" style="text-align: left;" trbidi="on">physical properties, chemical properties and its uses.</div>
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<span class="watch-title" dir="ltr" id="eow-title" style="background: transparent; border: 0px; margin: 0px; padding: 0px;" title="Physical properties of metals and non metals in detail">Physical properties of metals and non metals in detail<br /></span></h1>
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<span class="watch-title" dir="ltr" id="eow-title" style="background: transparent; border: 0px; margin: 0px; padding: 0px;" title="Science: Chemistry : Metals and Nonmetals, Chemical Properties">Metals and Nonmetals, Chemical Properties<br /></span></h1>
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Uses of metals:</div>
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1. Iron is used to make vehicles, machines, etc.</div>
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2. Copper and aluminium are used to make kitchen utensils, wires, etc.</div>
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3. Gold and silver are used to make jewellery and other decorative items</div>
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4. Tin is used to make cans</div>
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5. Aluminium is used in the making of aircraft bodies.<br />
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Uses of non- metals:</div>
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1. Carbon (diamond) is used in jeweleries.</div>
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2. Chlorine is used as a disinfectant, bleaching agent, etc.</div>
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3. Phosphorous is used in match-boxes and fertilizers.</div>
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4. Sulphur is used in vulcanizing rubber, fire crackers, detergents, paints, etc.</div>
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<span class="watch-title" dir="ltr" id="eow-title" style="background: transparent; border: 0px; margin: 0px; padding: 0px;" title="Elements, Metals and Non metals"><span style="color: red;">Elements, Metals and Non metals ( Extra Knowledge)</span><br /><br /><br /><br /><br /><br /><br /><a href="http://www.tenquestion.com/quiz-on-metals-non-metals-part-ii/">Quiz 1</a></span></h1>
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Anju pal , Scienceworkplacehttp://www.blogger.com/profile/00853658392241412635noreply@blogger.com0tag:blogger.com,1999:blog-3114277796949259926.post-67052095831925651972015-07-31T05:45:00.004-07:002015-07-31T05:45:37.983-07:00Cell - Structure and Functions<div dir="ltr" style="text-align: left;" trbidi="on">
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<b><span style="color: blue;">Cell - Structure and Functions</span></b></h2>
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Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body’s hereditary material and can make copies of themselves.</div>
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Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.<br />
<a href="https://www.youtube.com/watch?v=gFuEo2ccTPA">Introduction to cells</a><br />
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<a href="https://www.youtube.com/watch?v=uXdzuz5Q-hs">DNA</a><br />
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<b>Cell Structure</b><br />
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<b><a href="http://www.biology4kids.com/extras/quiz_cellintro/">Quiz 1</a></b></div>
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<b><a href="http://www.phschool.com/science/biology_place/biocoach/cells/quiz.html">Quiz 2</a></b></div>
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<b><a href="http://biologycorner.com/quiz/qz_cell.html">Quiz 3</a></b></div>
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Anju pal , Scienceworkplacehttp://www.blogger.com/profile/00853658392241412635noreply@blogger.com0tag:blogger.com,1999:blog-3114277796949259926.post-77646588278547074482015-05-04T07:01:00.005-07:002020-05-03T03:42:37.412-07:00Synthetic fibres and Plastics<div dir="ltr" style="text-align: left;" trbidi="on">
Synthetic fibres and Plastics</div><div dir="ltr" style="text-align: left;" trbidi="on">Concept Map</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-JI_eECtmjv2ut_FbIzUxliLML0tK6jsvrIf2gPtGy14bpoWW7tE0OqDOfVeNNL7QNM81dhWuL2BT9cupvU9AO_U1SC0xrVAxtZA1c3wqzEJXImlGZ3zv-oTdQxP65Y4gRtTd6VPVNdo/" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1280" data-original-width="902" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-JI_eECtmjv2ut_FbIzUxliLML0tK6jsvrIf2gPtGy14bpoWW7tE0OqDOfVeNNL7QNM81dhWuL2BT9cupvU9AO_U1SC0xrVAxtZA1c3wqzEJXImlGZ3zv-oTdQxP65Y4gRtTd6VPVNdo/w452-h640/Synthetic+fibre+and+plastics+viii.jpg" width="452" /></a></div><div dir="ltr" style="text-align: left;" trbidi="on"><br /></div><div dir="ltr" style="text-align: left;" trbidi="on">Source: NCERT<br />
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Videos </b><br />
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<li><a href="https://www.youtube.com/watch?v=nnbcIeh4B5Q">What are synthetic Fibres ?</a></li>
<li><a href="https://www.youtube.com/watch?v=xTr7QkpXtE4">Characteristics of synthetic fibres</a></li>
<li><a href="https://www.youtube.com/watch?v=73sGgmZoMBQ">Plastic planet</a></li>
<li><a href="https://www.youtube.com/watch?v=SKvGgb3YcDQ">3R,s</a></li>
</ul>
<b style="font-family: arial, helvetica, sans-serif; font-size: small; text-align: justify;">KVRO DELHI LIVE CLASS LINKS- https://www.facebook.com/kvsrodelhilive.junior.3/videos/124950082508786/</b><br />
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<li><span style="color: #660000; font-family: arial, helvetica, sans-serif; font-size: large; text-align: justify;"><b style="background-color: #999999;">Fibres which are man-made are called man-made or synthetic fibres. For example – rayon, nylon, acrylic, etc.</b></span></li>
<li><b><span style="background-color: #999999; font-size: large;"><span style="font-family: arial, helvetica, sans-serif; text-align: justify;"><span style="color: #20124d;">Synthetic Fibres:</span><span style="color: #660000;"> </span></span><span style="color: #660000; font-family: arial, helvetica, sans-serif; text-align: justify;">Synthetic fibres are small units of chemicals joined together in the form of chain. The chain so formed is called polymer.</span></span></b></li>
<li><b><span style="background-color: #999999; font-size: large;"><span style="font-family: arial, helvetica, sans-serif; text-align: justify;"><span style="color: #20124d;">Types of Synthetic </span><span style="color: #660000;">Fibres: </span></span><span style="color: #660000; font-family: arial, helvetica, sans-serif; text-align: justify;">Rayon,</span><span style="color: #660000; font-family: arial, helvetica, sans-serif; text-align: justify;">Nylon,</span><span style="color: #660000; font-family: arial, helvetica, sans-serif; text-align: justify;">Polyester,</span><span style="color: #660000; font-family: arial, helvetica, sans-serif; text-align: justify;">Terrycot ( fabric made after mixing of terylene and cotton),</span><span style="color: #660000; font-family: arial, helvetica, sans-serif; text-align: justify;">PET (Polyethylene terepthalate),</span><span style="color: #660000; font-family: arial, helvetica, sans-serif; text-align: justify;">Acrylic:</span></span></b></li>
<li><span style="color: #20124d; font-family: arial, helvetica, sans-serif; font-size: large; text-align: justify;"><b style="background-color: #999999;">Characteristic of Synthetic Fibre</b></span></li>
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<li><b><span style="background-color: #999999; color: #660000; font-size: large;">Synthetic fibres are cheaper than natural fibre.</span></b></li>
<li><b><span style="background-color: #999999; color: #660000; font-size: large;">Synthetic fibres are stronger than natural fibre.</span></b></li>
<li><b><span style="background-color: #999999; color: #660000; font-size: large;">Synthetic fibres are more durable than natural fibre.</span></b></li>
<li><b><span style="background-color: #999999; color: #660000; font-size: large;">It is easy to maintain the synthetic fibres.</span></b></li>
<li><b><span style="background-color: #999999; color: #660000; font-size: large;">It is easy to wash the synthetic fabrics.</span></b></li>
<li><b><span style="background-color: #999999; color: #660000; font-size: large;">Synthetic fabrics are dried up in less time.</span></b></li>
<li><b><span style="background-color: #999999; color: #660000; font-size: large;">Synthetic fibres are readily available.</span></b></li>
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<span style="background-color: #999999; font-size: large;"><span style="color: #660000; font-family: arial, helvetica, sans-serif; text-align: justify;"><b>Plastics</b></span><span style="color: #20124d;"><br />
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<span style="font-family: arial, helvetica, sans-serif; font-size: large;"><b style="background-color: #999999;"><span style="color: #20124d;">Types of Plastic</span><span style="color: #660000;">: Plastic can be divided into two main types – Thermoplastics and Thermosetting.</span></b></span></div>
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<b><span style="background-color: #999999; color: #660000; font-size: large;">Thermoplastic: Plastics which can be easily bent or deform on heating are known as thermoplastic. PVC and Polythene are the examples of thermoplastics. Thermoplastics are used in making toys, bottles, combs, containers, etc.</span></b></div>
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<b><span style="background-color: #999999; color: #660000; font-size: large;">Thermosetting plastic: Plastics which do not get deformed or softened on heating when mold once, are called thermosetting plastics. Bakelite and melamine are the examples of thermosetting plastics. Thermosetting plastics are used in making hard board, electric switch, handles</span></b></div>
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<b><span style="background-color: #999999; color: #20124d; font-size: large;">Characteristics of Plastic</span><span style="background-color: #999999; color: #660000; font-size: large;"> : Poor conductor, Plastic is non-reactive, Plastic is </span></b></div>
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<li><b style="font-family: arial, helvetica, sans-serif; text-align: justify;"><span style="background-color: #999999; color: #660000; font-size: large;">strong and durable</span></b></li>
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<li><b><span style="background-color: #999999; color: #20124d; font-size: large;">Biodegradable and Non-biodegradable:</span></b></li>
<li><b><span style="background-color: #999999; color: #660000; font-size: large;">Substances which get decomposed through the natural processes, such as action of bacteria, etc. are called biodegradable substances. For example; potato peels, peels of other vegetable, food stuffs, fruit, paper, cotton cloths, wood, etc.</span></b></li>
<li><b><span style="background-color: #999999; color: #660000; font-size: large;">Substances which either do not decompose or take many years to get decomposed through the natural process, are called non-biodegradable substance, e.g. tin, aluminium, plastics, etc.</span></b></li>
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<b><span style="background-color: #999999; color: #20124d; font-size: large;">Preventive measures:</span></b></div>
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<b><span style="background-color: #999999; color: #660000; font-size: large;">For dealing with the menace of plastic waste, we need to follow the three Rs, i.e. Reduce, Reuse and Recycle.</span></b></div>
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Anju pal , Scienceworkplacehttp://www.blogger.com/profile/00853658392241412635noreply@blogger.com0tag:blogger.com,1999:blog-3114277796949259926.post-35742217281365374042014-04-14T05:51:00.000-07:002020-04-03T12:54:10.391-07:00Microorganisms<div dir="ltr" style="text-align: left;" trbidi="on">
<b>Microorganisms</b><br />
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<b>The hidden life in a pond water</b><br />
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<b>How vaccines work</b></div>
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<b>Probiotics</b></div>
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<b><a href="http://www.kscience.co.uk/revision/microbes/quiz/microbes.htm">Quiz 1</a> ,<a href="http://microbemagic.ucc.ie/about_microbes/quiz.html"> Quiz 2</a>, <a href="http://www.bbc.co.uk/bitesize/quiz/q29881267">Quiz 3</a></b></div>
Anju pal , Scienceworkplacehttp://www.blogger.com/profile/00853658392241412635noreply@blogger.com0tag:blogger.com,1999:blog-3114277796949259926.post-29298723561505026612014-04-10T11:04:00.000-07:002015-10-24T22:26:00.982-07:00Greenhouse effect<div dir="ltr" style="text-align: left;" trbidi="on">
Greenhouse effect<br />
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Anju pal , Scienceworkplacehttp://www.blogger.com/profile/00853658392241412635noreply@blogger.com0tag:blogger.com,1999:blog-3114277796949259926.post-40227657585404701552014-04-10T10:18:00.005-07:002020-04-03T03:06:27.905-07:00CHAPTER 1.Agricultural Practices<div dir="ltr" style="text-align: left;" trbidi="on">
<b>CHAPTER 1.Agricultural Practices</b><br />
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<b>Soil preparation</b><br />
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<b>Using seed drill</b><br />
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<b>Rahat ( traditional irrigation system)</b></div>
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<b>Sprinkler</b></div>
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<b>Harvesting</b></div>
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<b>Working of Combine</b></div>
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<b>Storage of grains</b></div>
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Anju pal , Scienceworkplacehttp://www.blogger.com/profile/00853658392241412635noreply@blogger.com0