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      <title>Metais e ligas metálicas by Leticia Teixeira</title>
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      <description></description>
      <language>en-us</language>
      <pubDate>2024-09-23 10:34:25 UTC</pubDate>
      <lastBuildDate>2024-09-30 10:30:10 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
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      <item>
         <title>6000 a.C.</title>
         <author>a115622_1</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3132995929</link>
         <description><![CDATA[<p>Ouro</p>]]></description>
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         <pubDate>2024-09-23 10:39:39 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3132995929</guid>
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      <item>
         <title>4500 a.C.</title>
         <author>a115622_1</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133000377</link>
         <description><![CDATA[<p>Cobre</p><p>Surgiu no início da idade do cobre.</p>]]></description>
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         <pubDate>2024-09-23 10:42:01 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133000377</guid>
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      <item>
         <title>4000 a.C.</title>
         <author>a115622_1</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133012250</link>
         <description><![CDATA[<p>Prata</p>]]></description>
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         <pubDate>2024-09-23 10:49:19 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133012250</guid>
      </item>
      <item>
         <title>3500 a.C.</title>
         <author>a115622_1</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133013857</link>
         <description><![CDATA[<p>Chumbo</p>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/2758318430/cf1d30200432f71951f6bf61a0b87b3e/image.png" />
         <pubDate>2024-09-23 10:50:14 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133013857</guid>
      </item>
      <item>
         <title>3300 a.C.</title>
         <author>a115622_1</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133018792</link>
         <description><![CDATA[<p>Bronze</p><p>É uma liga metálica composta por cobre e estanho, que surgiu no início da idade do bronze.</p>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/2758318430/211f180ff0199a71edb31f4a7b6184e1/image.png" />
         <pubDate>2024-09-23 10:53:43 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133018792</guid>
      </item>
      <item>
         <title>1500 a.C.</title>
         <author>a115622_1</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133021153</link>
         <description><![CDATA[<p>Ferro</p><p>A mistura de Ferro com Carbono terá formado aço que deu origem ao início da idade do ferro.</p>]]></description>
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         <pubDate>2024-09-23 10:55:00 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133021153</guid>
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      <item>
         <title>Séc. XIX</title>
         <author>a115622_1</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133026211</link>
         <description><![CDATA[<p>Magnésio</p>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/2758318430/9c7765c3015b2e8b26308d18b6ab0aec/image.png" />
         <pubDate>2024-09-23 10:58:53 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133026211</guid>
      </item>
      <item>
         <title>Séc. XIX</title>
         <author>a115622_1</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133026816</link>
         <description><![CDATA[<p>Alumínio</p>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/2758318430/e42e9742c1a69ee6f41e2238be73e577/image.png" />
         <pubDate>2024-09-23 10:59:18 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133026816</guid>
      </item>
      <item>
         <title>Reciclagem</title>
         <author>a115622_1</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133038723</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/2758318430/74f2466b09471ffe00e9cbb8f26926d9/image.png" />
         <pubDate>2024-09-23 11:07:38 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3133038723</guid>
      </item>
      <item>
         <title>O processos de reciclagem dos metais</title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138160781</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 13:32:30 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138160781</guid>
      </item>
      <item>
         <title>1. Coleta</title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138447356</link>
         <description><![CDATA[<p>Os resíduos do metal que foram usados e descartados vão ser coletados para serem reciclados.</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 15:52:53 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138447356</guid>
      </item>
      <item>
         <title>2. Separação</title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138456224</link>
         <description><![CDATA[<p>O material é separado de todos os outros resíduos.</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 15:58:06 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138456224</guid>
      </item>
      <item>
         <title>3. Compactação</title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138458963</link>
         <description><![CDATA[<p>Para facilitar o transporte, o aço e o alumínio são, por exemplo compactados em fardos ou blocos.</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 15:59:38 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138458963</guid>
      </item>
      <item>
         <title>4. Fusão </title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138461647</link>
         <description><![CDATA[<p>Os metais depois de compactados são aquecidos a altas temperaturas até sofrerem fusão e cada metal tem o seu ponto de fusão.</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 16:01:20 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138461647</guid>
      </item>
      <item>
         <title>5. Purificação</title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138463795</link>
         <description><![CDATA[<p>Após a fusão, os metais são purificados e todas as impurezas são removidas.</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 16:02:32 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138463795</guid>
      </item>
      <item>
         <title>6. Lingotamento ou solidificação</title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138469214</link>
         <description><![CDATA[<p>O metal, já no estado sólido e transformado em lingotes está pronto para ser reutilizado em novos produtos. </p><p><br/></p><p>Os metais com mais aplicações na sociedade são o ferro, usado na produção de aço, o alumínio e o cobre. A reciclagem destes metais trazem diversas vantagens.</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 16:05:40 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138469214</guid>
      </item>
      <item>
         <title>Conclusão - Aço</title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138494944</link>
         <description><![CDATA[<p>Por exemplo, a reciclagem do aço economiza cerca de 75% da energia em comparação com a produção do aço através do ferro, assim como o consumo de recursos naturais. Ex: ferro</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 16:19:17 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138494944</guid>
      </item>
      <item>
         <title>Alumínio</title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138499147</link>
         <description><![CDATA[<p>O alumínio reciclado apenas precisa de 5% da energia que seria necessária para obter alumínio novo. </p><p><br/></p><p>A reciclagem do alumínio vai também preservar tanto o minério como ecossistema.</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 16:21:45 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138499147</guid>
      </item>
      <item>
         <title>Ferro</title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138502109</link>
         <description><![CDATA[<p>A reciclagem do ferro vai reduzir impactos ambientais e preservar os recursos minerais.</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 16:23:31 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138502109</guid>
      </item>
      <item>
         <title>Cobre </title>
         <author>a111813</author>
         <link>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138505562</link>
         <description><![CDATA[<p>A reciclagem do cobre também reduz o consumo de energia e ajuda a preservar as reservas naturais do minério.</p>]]></description>
         <enclosure url="" />
         <pubDate>2024-09-25 16:25:34 UTC</pubDate>
         <guid>https://padlet.com/a115622_1/3f6tf766b7igkmi0/wish/3138505562</guid>
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