Unit 5. Man-made materials - Contenido educativo
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So, that was the clay, the leather, the wool, the wood. All that is natural materials, okay? We get these materials from the nature, but there are other materials that are man-made.
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Do you remember what is my name?
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Very good.
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For example, the plastic.
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The plastic is in the nature.
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Now, we use oil to make the plastic.
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Okay?
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The plastic is made with oil.
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And for example, the glass.
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Glass is in the nature, but it's not like we know.
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We need something to transform into glass.
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Sand.
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Sand, very good.
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So we use sand.
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We transform the sand into glass.
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It's a kind of flour.
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So with the sand we can make glass.
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It's not exactly in man-made, but it's not in the nature, okay?
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We cannot go to the nature and find glass.
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And what's the other one?
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Metal.
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Metal, okay.
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We use minerals to make metal.
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Yes?
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And what happens then with the cotton? Is man-made or is it natural? It's natural. It's natural material. Okay. For example, a plastic bottle. A plastic bottle. Like this. Is man-made or natural? It's plastic. So it's a man-made material.
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Mm-hmm.
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- Subido por:
- Virginia M.
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