Although talking about earthquakes and tsunamis sounds exotic, they are very common and happen frequently near us. This video shows why they occur, the trigger and where the possibility of an event is higher. Year of creation: 2019. https://www.youtube.com/watch?v=Pvbf7D2buCM&feature=youtu.be

An overview of the types of eruptions, emitted materials and volcanic areas of Spain and the world through stunning videos and images. Year of creation: 2019. https://www.youtube.com/watch?v=VY1ny7SIn7s&feature=youtu.be

Discover the technology that enables to explore the terrain without being in contact with it. https://www.youtube.com/watch?v=YGOxPPSfduY&feature=youtu.be

Discover the true shape of the Earth and how cartographic projections allow portray it in a flat surface in different ways depending on the purpose of the map. Year of creation: 2019. https://www.youtube.com/watch?v=f6iy1lnyEc0&feature=youtu.be

All the clues for understanding symbols, scale and relief of the National Topographic Map are in this video. Year of creation: 2019. https://www.youtube.com/watch?v=n85PtxeU71k&feature=youtu.be

Logarithmic Equations and Systems A logarithmic equation is an equation that has an unknown factor in the argument of a logarithm. In reality, the resolution is reduced to the resolution of equations of the same type as the expressions in the arguments (quadratic equations, cubic equations, irrational equations...). Before starting the exercises, let's remember the logarithmic properties: Logarithm of a product: Logarithm of a quotient: Logarithm of a power: Change of base: Use...

Pythagoren Theorem Pythagoras' Theorem: Given a right triangle with sides a and b and a hypotenuse h (the side opposite the right angle). Then, Remember that... triangle is a right-angled triangle because it has a right angle, an angle of 90º or π / 2 radians The hypotenuse is the opposite side as the right angle. Note: h is always bigger than the other sides, as shows h > a and h > b. The Pythagoras theorem is one of the most known results in mathematics and also one...