Explain the differences between Basaltic, Rhyolitic and Andesitic volcanic eruptions.docx uploaded successfully
Explain the differences between Basaltic, Rhyolitic and Andesitic volcanic eruptions with reference to processes, which lead to the eruptions, the type of volcano produced and the reasons for the differences between the material erupted by these volcanoes.
Volcanic eruptions are caused by a red-hot liquid rock, called magma inside the earth's core. Volcanoes erupt when magma rises to the surface of the earth, which causes bubbles of gas to appear in it. This gas can cause pressure to build up in the mountain, and it eventually explodes. When the magma bursts out of the earth, it is called lava. The type of magma in the earth can create different volcanoes. If the magma is quite thin, the gas can escape easily and there will not be an explosion. The magma just comes out of the mountain and flows down the sides, like Volcanoes in Hawaii and Mount Etna. But, if the magma is thick and sticky, the gas cannot escape, so it builds up and up until it explodes. This can cause landslides and sends out huge clouds of burning rock and gas, which devastate everything around them, like the famous eruptions at Mount St Helens and Montserrat. Volcanic eruptions have many effects they can change the weather. They can cause rain, thunder and lightning. Volcanoes can also have long-term effects on the climate, making the world cooler; this happened when Mt. Pinatubo erupted in 1991, global temperatures dropped by 0.5 Celsius the following year. Also, Fast-moving lava known as pyroclastic flows can kill people and falling ash can make it hard for them to breathe. They can also die from famine, fires and earthquakes, which can be related to volcanoes. People can lose their possessions as volcanoes can destroy houses, roads and fields. Lava can kill plants and animals too. The Mount St Helens volcano in 1980 killed an estimated 24,000 animals including 11,000 hares, 6,000 deer, 300 bobcats, 200 black bears and 15 mountain lions.
The theory for plate tectonics, which causes the
Volcanic eruptions are caused by a red-hot liquid rock, called magma inside the earth's core. Volcanoes erupt when magma rises to the surface of the earth, which causes bubbles of gas to appear in it. This gas can cause pressure to build up in the mountain, and it eventually explodes. When the magma bursts out of the earth, it is called lava. The type of magma in the earth can create different volcanoes. If the magma is quite thin, the gas can escape easily and there will not be an explosion. The magma just comes out of the mountain and flows down the sides, like Volcanoes in Hawaii and Mount Etna. But, if the magma is thick and sticky, the gas cannot escape, so it builds up and up until it explodes. This can cause landslides and sends out huge clouds of burning rock and gas, which devastate everything around them, like the famous eruptions at Mount St Helens and Montserrat. Volcanic eruptions have many effects they can change the weather. They can cause rain, thunder and lightning. Volcanoes can also have long-term effects on the climate, making the world cooler; this happened when Mt. Pinatubo erupted in 1991, global temperatures dropped by 0.5 Celsius the following year. Also, Fast-moving lava known as pyroclastic flows can kill people and falling ash can make it hard for them to breathe. They can also die from famine, fires and earthquakes, which can be related to volcanoes. People can lose their possessions as volcanoes can destroy houses, roads and fields. Lava can kill plants and animals too. The Mount St Helens volcano in 1980 killed an estimated 24,000 animals including 11,000 hares, 6,000 deer, 300 bobcats, 200 black bears and 15 mountain lions.
The theory for plate tectonics, which causes the