Volcanic

• FALSE - the word volcano comes from the island vulcan which is a volcanic island in italy. the islad actually got its name from the roman god of fire vulcano
• False - the crust is the outer layer of the earth. it varies in thickness from 0 to 60km thick it is not even and is made up of pieces which overlap to cover the entire planet these pieces are called tectonic plates
• True- the outer core is a liquid layer made out of molten iron and nickel this liquid metal creates the earth's magnetic field
• True - the mantle is approximately 2897km thick and is made of a solid, rocky substance called molten rock pr magma this is what escapes when a volcano erupts
• False - The inner core is a solid layer and is made of iron and gold it is the hottest part of the earth and can reach temperatures of up to 5500 Degrees
• False - the ring of fire is an area of the pacific ocean that is shaped like a horseshoe it is home to 90% of the world's earthquakes and 100% of the world's volcanoes
• True - An active volcano is one that has erupted recently and there is a possibility that it may erupt again
• False - An extinct colcano is one that has not erupted for a long time however it may still erupt in the future
• False - A dormant volcano is one which has erupted thousands of years ago but it will probably never erupt again
• True - A composite volcanoes are steep sided volcanoes and are made up of lots of layers of volcanic rocks they usually erupt in a explosive way because the magma in these volcanoes is quite sticky
• False - A shield volcanoes are circular or oval cones they are made up of small fragments of lava which are blown into the air through a single vent when they cool down they form rock