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What Is a Gymnosperms?

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A gymnosperm refers to the group of seed-bearing plants. These plants include conifers, cycads, Ginkgo, and Gnetales. Gymnosperm normally develop seeds on the surface of scal…

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Why do Earthquakes Occur?

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Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two…

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What is Heavy Water ?

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Heavy water, formally called deuterium oxide or 2H2O or D2O, is a form of water that contains a larger than normal amount of the hydrogen isotope deuterium, (also known as &qu…

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Why is the Sky Blue?

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A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, w…

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