How Are Rocks Formed?
The Earth’s crust and upper mantle are collectively known as the lithosphere, from which the tectonic plates are composed. It is in the lithosphere that rocks are...
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When Does a Geyser Occur?
A geyser occurs when a hot spring erupts, hurling a column of water and steam high into the air. These springs are situated in regions which were formerly volcanic and...
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When Does Coal Become a Precious Stone?
Coal is basically a compound consisting largely of carbon. When a piece of carbon deep underground is subjected to great heat and pressure, it may gradually be...
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Where Does Coal Come From?
Coal comes from the remains of trees, shrubs, and plants that grew millions of years ago, in tropical wetlands, such as those of the late Carboniferous period (the...
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What Is a Wetsuit and How Does It Work?
What Is a Wetsuit and How Does It Work? If you plan to go exploring deep under the sea using scubagear, there’s one essential item you’re going to need: a...
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