What are they?
They are not the ceramic plates you eat your food or but are believed the be sections just below the surface of the earth. Plate tectonics are what we believe helps shows us the movement of the earths surface like continents now and in the past. Plate tectonics is the theory that Earth's outer shell is split into several plates that cover mantle. The mantle is the inner layer above the core.
Hot material near the Earth's core rises, and colder mantle rock sinks which forms mid-ocean ridges. Mid-ocean ridges are gaps between tectonic plates.. Hot magma comes together at the ridges making new ocean crust and forcing the place apart. Convergent boundaries, are one of the three types of plate boundaries. The others are divergent and transform boundaries. Convergent boundary is when the plate push against each other forming rock to be forced upwards creating the mountain.
How does a volcano form?
Magma is molten rock and can be partially fluid, solid and gaseous. The earth is divided into 3 major layers: The core, mantle and the crust. It was in the 1960's when scientist came up with a theory called Tectonic Plates. These 'Plate tectonics' are believed to be within the lithosphere. The lithosphere is supposed to be a layer within the outer crust. and very top of the mantle. There are 7 plates, and many smaller plates. These plates can move but slowly. Magma can force its way up through the plates or around the plates. Interplate volcanic activity is caused by very hot mantle material being created in the lower mantle which forces its way up to the upper mantle.
Mantle material is said to believe to be over 500 kilometeres wide. Because of the hot mantle material, it melts creating magma below the earths crust. When solid rock melts the density changes. When there are differnt densities occure, the magma rises upwards. Once this happens it goes into what is called magma chambers. just below the crust. If a crack opens, it gives the chance for magma to explode through the crust. Once out of the crust it flows down creating a volcano. The magma is now known as lava.
Once the eruption stops, magma keeps on growing causing enough pressure for a second eruption.
Hot material near the Earth's core rises, and colder mantle rock sinks which forms mid-ocean ridges. Mid-ocean ridges are gaps between tectonic plates.. Hot magma comes together at the ridges making new ocean crust and forcing the place apart. Convergent boundaries, are one of the three types of plate boundaries. The others are divergent and transform boundaries. Convergent boundary is when the plate push against each other forming rock to be forced upwards creating the mountain.
How does a volcano form?
Magma is molten rock and can be partially fluid, solid and gaseous. The earth is divided into 3 major layers: The core, mantle and the crust. It was in the 1960's when scientist came up with a theory called Tectonic Plates. These 'Plate tectonics' are believed to be within the lithosphere. The lithosphere is supposed to be a layer within the outer crust. and very top of the mantle. There are 7 plates, and many smaller plates. These plates can move but slowly. Magma can force its way up through the plates or around the plates. Interplate volcanic activity is caused by very hot mantle material being created in the lower mantle which forces its way up to the upper mantle.
Mantle material is said to believe to be over 500 kilometeres wide. Because of the hot mantle material, it melts creating magma below the earths crust. When solid rock melts the density changes. When there are differnt densities occure, the magma rises upwards. Once this happens it goes into what is called magma chambers. just below the crust. If a crack opens, it gives the chance for magma to explode through the crust. Once out of the crust it flows down creating a volcano. The magma is now known as lava.
Once the eruption stops, magma keeps on growing causing enough pressure for a second eruption.