2012-08-05 09:55:25 +00:00
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<h1>What is the World made of?</h1>
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2012-08-05 11:37:43 +00:00
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<p class="abstract">The world around us, everything we see, touch,
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smell and taste, is made of matter. Everything from the device you are
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reading this webpage on and the ground that you are standing on to
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your body and the air you breathe - all consist of matter. But what is
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"matter"? People have been puzzling over this question for
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generations. In the early 20th century, it was believed that the
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smallest unit of matter was the atom (from greek atomos, meaning
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indivisible). It was known that atoms of different types have
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different properties and cannot be transformed into one
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another. However, today we know what atoms are made up of and why the
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different atoms have different properties. </p>
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