1. Volcano Make up Bellwork

2. Bellwork 1.A ______ is mountain made up of layers of lava and ash 2.The _____________ is a chain or ring of volcanoes around the pacific ocean created by convergent boundaries 3.Iceland formed at ______ boundary where plates are spreading apart 4.Hawaii formed over a _____ _____. 5.The Hawaiian Island chain formed as the ______ plate moved over the stationary_____ _____ 6.Mount Saint Helens formed above a subduction zone at a ________boundary Answer Bank divergent Convergent Volcano pacific Hot spot (2) Ring of Fire

3. 1.As its silica content increases, magma tends to have a thicker or greater _______ 2._____ magma is a very fluid easy flowing, low viscosity magma which can travel great distances 3._____ magma is a thick, high viscosity which has a high resistance to flow because of its high silica level. 4.Lava with low levels of silica and a low gas content will travel large distances and create flat ____ Volcano Answer Bank basaltic Shield viscosity rhyolitic Bellwork

4. 1. The 3 places we find volcanoes are at _______ boundaries, ______ boundaries, and_________. 2. ________is located at a________plate boundary, here two plates are_______. 3. Fluid, Low viscosity lava with low levels of silica will travel large distances, creating a gentle flat sloping ______volcano 4. Magma or lava with more silica tends to have greater _______. Answer Bank basaltic Shield Mt. Saint Helens Convergent (2) viscosity Silica collide High (2) Divergent Hot spot Bellwork

5. 1.Volcanoes are classified into 3 types; _______ cone, ______ cone, and ________. 2.Composite Volcanoes erupt violently, and _______; while Shield volcanoes erupt quietly and non- ________. 3.Cinder cone volcanoes have _______ sided slopes; while Shield volcanoes have ______, gentle slopes. 4. Large shield volcanoes are made of layers of ______, giving them _______, gently sloping sides. 5. Mt. _____ _____ is an example of a composite volcano. Answer Bank Lava Kilauea Composite Cinder Cone Shield Steep Explosively Non-explosively flat Saint Helens

6. 1)What are the names of the 3 volcanoes above? 2)Which volcano is the most explosive? 3)Which volcano is the least explosive? 4)Which volcano is the steepest? 5)Which volcano is an example of Mt. Saint Helens Washington? 6)Which volcano is an example of Hawaii? A B C Bellwork Answer Bank Cinder Cone Shield Composite Cone