Science & Mathematics Questions & Answers

Science & Mathematics Questions & Answers

What are sciophytes?

Sciophytes are shade-loving trees or plants. These plants have larger photosynthetic units than sun plants or heliophytes. Sciophytes are also known as photophobous plants and they reach their saturation level in only 20% sunlight. Shade-plants essentially follow strategies of optimum use of available energy and conservation of energy. Adaptation to achieve these strategic goals include thinner leaves with a relatively …

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What are rift valleys?

Movements of plates in the top layers of the Earth’s crust create enormous tension, which sometimes makes long cracks, or faults, in rocks. Continuing tugging movements make blocks of land sink down between roughly parallel sets of faults, forming troughs called rift valleys. The world’s biggest rift valley runs from south-eastern Africa, through East Africa and the Red Sea to …

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What are red tides?

Red tides are a natural phenomenon caused by high concentration of microscopic algae that are poisonous. The organism produces a toxin that affects the central nervous system of fish, paralyzing them. As a result, dead fish are washed ashore. They can cause human illness and deaths too, following consumption of toxic fish. When red tide algae reproduce in dense concentrations …

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What are quarks and gluons?

For close to three decades, nucleons (protons and neutrons) were considered to be the ultimate subatomic particles. As scientists delved deeper, they detected shadows of yet another layer of matter inside nucleons. Unable so far to crack open a nucleon and bring out one of these shadowy objects for observation and measurement, they named them quarks. It is believed that …

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What are ores, and where might you expect to find them?

You must realize that the Earth provides us with all the raw materials swallowed up by our industries. Many of these material are minerals. The word ‘mineral’ is used to denote any substance obtained by mining. It is clear that the words mine and mineral have similar origins. You might expect that Minerals would be spread throughout the Earth, and …

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