219 questions and answers in this section

Natural Sciences » Geology

Explain why some geological caves form in limestone areas?

Explain why some geological caves form in limestone areas?

Limestone is a sedimentary rock mainly composed of calcium carbonate (CaCO3). It is formed largely from the shells and skeletons of marine organisms that accumulate...

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Explain why the Minoan civilization used a sophisticated sewer system at Knossos.

Explain why the Minoan civilization used a sophisticated sewer system at Knossos.

The city of Knossos on the island of Crete had a rather warm climate with dry summers and mild but sometimes very humid winters. With...

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Explain why it is difficult to walk on wet sand.

Explain why it is difficult to walk on wet sand.

Dry sand is made up of grains that don’t hold together too well, but when it’s slightly damp, a small amount of water forms liquid...

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Explain why sea turtles return to nest on the same beach every year?

Explain why sea turtles return to nest on the same beach every year?

To find their native beach each time they return to lay eggs, sea turtles primarily use the Earth's magnetic field, which serves as a true...

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Explain why the color of lava changes from white to red?

Explain why the color of lava changes from white to red?

Very hot lava starts with a white or bright yellow color, as its temperature often exceeds 1000 to 1200°C. At these high temperatures, the molten...

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Explain why some rocks transform into colorful crystals over time?

Explain why some rocks transform into colorful crystals over time?

Colored crystals form through the slow solidification of minerals present in certain rocks. As they cool or under the effect of pressure, these minerals gradually...

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Explain why volcano calderas can become freshwater lakes?

Explain why volcano calderas can become freshwater lakes?

A caldera is simply a huge basin formed by the sudden collapse of the summit of a volcano when the magma chamber empties after a...

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Explain why geysers spout hot water at regular intervals?

Explain why geysers spout hot water at regular intervals?

Underground, hot rocks from the magma continuously heat the water present in underground cavities. This water gradually heats up but does not boil immediately due...

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Explain why some mountains have pointed peaks while others have rounded shapes?

Explain why some mountains have pointed peaks while others have rounded shapes?

The type of rock is a determining factor in the formation of mountain peaks. Hard and resistant rocks, such as granite and gneiss, tend to...

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Explain why beach sand can be magnetized.

Explain why beach sand can be magnetized.

When you pass a magnet over the sand on a beach, you can sometimes see some black grains sticking to it: these grains have a...

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