What are tides and why do they occur

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If you have studied or are studying science, surely you have heard from time to time about tides. These large waves that cause the sea level to rise are a fairly common and popular phenomenon...

Earthquakes: what are they, types, causes and consequences?

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Everyone has the image of an earthquake in mind. We have seen them in the movies and on television, where they have found their way through fiction or on news channels when they take place...

Why is the sea salty?

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We all know that sea and ocean water is salty, but do we know why this is so? If the rivers that flow into the sea are freshwater, why is the ocean salty? About 4.650 million...

Why is the ocean blue?

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You have seen water millions of times and you could assure without fear of being wrong that it is transparent. When you drink it from a glass or bottle, when you turn on the...

Where does oil come from

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We use it every day to fill the tank of our cars, to run our factories, to build everyday objects such as plastic bags, but where does the oil come from? Surely you already know that...

When the tide rises and falls

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The Sun and the Moon exert their gravitational force on the Earth causing regular changes in the sea level that we call the tide. The amplitude of the tides is usually almost imperceptible in the...

What if the earth stopped spinning?

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Measured from the equator, our planet rotates at a rate of 465 meters every second. Faced with such speed, have you ever wondered what would happen if it suddenly stopped spinning? What would happen if suddenly...

What are the layers of the Earth?

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Did you think that our planet was a simple land mass? Well, it is something much more complex than that, since what is our home has both internal and external layers that give it some...

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