Knowledge Organiser There She Blows Year 34 Spring

Knowledge Organiser There She Blows Year 3/4 Spring 1 A volcano is a very deep hole in the Earth’s top layer that can let out hot gasses, ash and lava. Many volcanoes are also mountains. Volcanoes have long shafts that go all the way down through the Earth’s first layer, the crust, to magma in between the crust and the mantle (the Earth’s second layer). It’s so hot there that rocks melt into liquid! This is called magma, which travels up through volcanoes and flows out as lava. Northern hemisphere: This is the northern half of the earth (above the equator). Countries in the northern hemisphere include all of those in Europe, North America, Canada and some African countries such as Egypt, Nigeria, Ghana and many more. Antarctic Circle: The line of latitude below the tropic of Capricorn. The South Pole lies within the Antarctic Circle. Tropic of Cancer: An imaginary line of latitude than runs parallel to but above the Equator. Pacific Ring of Fire: The Ring of Fire is an area around the Pacific Ocean where 70% of the volcanoes are located and 90% of the earthquakes occur. Equator: An imaginary line that cut the earth in half horizontally. It’s a line of latitude. Tectonic Plate: The earth's crust is cracked and the pieces of the Earth's crust formed by the cracks are called tectonic plates. Tropic of Capricorn: An imaginary line of latitude than runs parallel to but below the Equator. Some Famous volcanoes that we will be learning about are: Mount St Helens (in the USA, North America), Krakatoa (Indonesia, Asia), Mt, Etna (Italy, Europe) and Mt Unzen (Japan, Asia). Arctic Circle: The line of latitude above the tropic of Cancer. The North Pole lies within the Arctic Circle.