Santiago
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Is Atacama Desert cloudy or cloudless most of the year?
7 votes

Atacama desert is cloudless most part of the year. Except for the litoral, where a fog from the sea goes inland. This phenomena is called camanchaca. Telescopes for astronomy are located in high ...

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Is there a time difference between two points at the same longitude but at different latitudes?
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7 votes

Earth's rotation has a fixed angular speed, therefore time is the same across the entire surface. Even though the tangential speed (speed of the point in the surface) is different in each place of ...

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Why doesn't the whole volcanic cone appear black?
Accepted answer
4 votes

The cooled lava might be covered by ashes. So depending of the amount of ashes and the wind you might have a black volcano or a gray volcano. Many volcanoes are formed by layers of lava and ash. ...

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How does liquid iron create a magnetic field?
3 votes

It seems your question assumes that Earth magnetic field is caused by natural magnets inside the Earth. Instead, the magnetic field comes from the movement of charged particles. Any electrical charged ...

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How much area in the world is under SemiArid climate?
3 votes

According to this link is 14% for Köppen classification. The precise cite is: "BS - dry semiarid (steppe). Is a grassland climate that covers 14% of the Earth's land surface."

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Global warming versus nuclear half-lives
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2 votes

Maybe you can describe how many degrees of global warming are you trying to compare that massive meltdown. There are several nuclear waste, like the following: Xe133, I131, Cs134, Cs137, Te132, Sr89, ...

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Why are CO2 sensors so expensive when CO sensors aren't?
2 votes

First you need to make the difference between a detector and a sensor, while the first one only shows that some gas is present, the second has to show the amount of gas. Usually a sensor needs ...

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How do rivers last so long in dry weather?
2 votes

Glaciars and snow in mountains act as natural dams for many rivers. That's why several rivers have an increase of their flow during hot times, when the snow melts and the river moves more water ...

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Can large earthquakes happen twice/thrice at the same place within a short timeframe
2 votes

You will only have aftershocks, which are always smaller than the original earthquake. Aftershocks are the accomodation of the surface to its new position after the big movement of the original ...

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Trends in atmospheric CO2
1 votes

Since CO2 concentration is responsible of temperature, that trend is related to the little ice age, where Earth cooled a little. Wikipedia article describes several possible causes for that, one of ...

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Why in different places seems directions are changed?
1 votes

Even though sun always moves from east to west, latitude affects the north-south perception. If you are in the north hemisphere, beyond the tropic of cancer, the sun will be most of the time in the ...

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Earthquakes and mountain height
1 votes

Present earthquakes create new mountains, former earthquakes created old mountains. Hence, the Alps are older than the Appenines. In the past surely the Alps had more earthquakes than now.

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Do ice crystals form in running super-cold water?
1 votes

Rivers can freeze, but only on the surface. The water still flows below the ice. When it is colder, the ice layer can become thicker. The kinetic energy of the moving water in rivers delays this ...

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How probable is is that earth magnetic field will change 180 degrees at once?
-1 votes

Magnetic field exist because of the hot liquid in the external core of Earth moves, that movement of charged particles produces the magnetism. Therefore, the magnetic field can't change at once, it ...

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(Why) Is there more landmass on Earth's Northern hemisphere than the Southern Hemisphere?
-3 votes

While I cannot give a good explanation, at least I can give additional information. Antartica, continent that is just in the south of the Earth, is completely surrounded by rifts, where new land in ...

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