Rosemarie

The aim of this report is to explain 3 kind of rocks: the metamorphic, the sedimentary and the igneous. ---------------------------------------- How and where are they formed?  They have a very different way of being produced. The metamorphic rock is formed underground, in this rock, the molecular structure change because of the pressure, heat and chemical reactions. They can usually be found in mountainous regions.  The sedimentary rock is formed in the seabed by sediments. They are accumulated in layers; the sediments from the bottom are compressed by the above ones joining them and creating the rock. They are found covering the majority of the Earth's upper crust.  The igneous rock is formed when magma from the volcanoes rises up and cools. Because of this, they are found around areas where volcanic activity is done. ---------------------------------------- What they are used for?  Metamorphic rocks are used for roofing material, decor...

Pacific ring of fire facts The Pacific ring of fire is a horseshoe of islands in differents parts of the world with a lot of volcanic activity, maybe because they are near areas where tectonic plates are. The ring of fire contains 75% of volcanoes in the world. Volcanoes in the area It is belief that the ring of fire has 452 volcanoes, some of the most active are there for example Mt Fuji in Japan, Mt. Saint Helens and Mt. Rainier in the American North West, Krakatoa in Indonesia, Mauna Loa in Hawaii, Galeras in Colombia and Sangay in Ecuador. These volcanoes can be really dangerous for human population. Most Dangerous Volcanoes Because of all the activity in the Pacific Ring of Fire it is very possible that one of those volcanoes could cause a lot of trouble for a lot of people. The Santa Maria Volcano in Guatemala has already shown its power with one of the most catastrophic eruptions in the 20th century.  Back then the volcano affected a very large part of the south...