1274 questions and answers in this section
Explain why is Mount Everest nicknamed the roof of the world?

Explain why is Mount Everest nicknamed the "roof of the world"?

May 29, 1953, a date to be marked with a white stone. Sir Edmund Hillary from New Zealand and Tenzing Norgay, a Nepalese Sherpa, were...

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Explain why are some stars called white dwarfs?

Explain why are some stars called white dwarfs?

Historically, the term white dwarf dates back to the early 20th century, when astronomers discovered very small but very bright stars of white color. They...

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Explain why limestone caves often have underground rivers.

Explain why limestone caves often have underground rivers.

Limestone is a sedimentary rock primarily composed of calcium carbonate, often derived from the remains of dead marine organisms accumulated on the sea floor a...

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Explain why pasteurized milk lasts longer than raw milk.

Explain why pasteurized milk lasts longer than raw milk.

Pasteurization is a simple thermal treatment that allows, by rapidly heating milk to a temperature generally between 72°C and 85°C for a few seconds, to...

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Explain why do heatwaves affect electricity?

Explain why do heatwaves affect electricity?

Heatwaves often create imbalances in the electrical grid. When electricity demand surges due to intensive use of air conditioning, the grid is put under significant...

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Explain why are reflections on the surface of water inverted compared to reality?

Explain why are reflections on the surface of water inverted compared to reality?

The refraction of light is an essential optical phenomenon to consider when observing reflections on the surface of water. When light passes from one medium...

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Explain why some volcanoes form underwater?

Explain why some volcanoes form underwater?

Beneath the oceans, the Earth's crust is not fixed but divided into immense pieces called tectonic plates. These plates move slowly, sometimes pulling apart and...

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Explain why can some lakes transform into lava lakes?

Explain why can some lakes transform into "lava lakes"?

Some volcanoes have a magma chamber directly connected to the surface. When the magma rises, it can form permanent pools, called lava lakes, directly visible...

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Explain why do some mountains have snowy peaks all year round?

Explain why do some mountains have snowy peaks all year round?

The local climate plays a key role in ensuring that certain mountains remain snow-covered year-round. For example, near coastal regions, the significant humidity from the...

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Explain why can the length of days vary depending on the year?

Explain why can the length of days vary depending on the year?

The Earth moves through space with a slightly tilted axis (about 23.5 degrees relative to its orbit). This detail is not trivial; it is even...

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