Hosted by Mark, Sam and Gerald Layers of the Earth Rocks and Minerals More Rocks and Minerals Plate Tectonics 100 100 100 100 200 200 200 200 300 300 300 300 400 400 400 400 500 500 500 500 What are mantle rocks? This flows slowly. Row 1, Col 1 What is marble? Chalk becomes this when metamorphasized 1,2 What is extrusive rocks Lava is brought to the surface Hardens to form this type of Igneous rock 1,3 What is a fault A break along which two rocks Move. 1,4 What is the Gutenburg discontinuity? This separates the Earth’s mantle From the outer core 2,1 What are sedimentary rocks Breccia, coal and puddingstone are this 2,2 What is composition and texture Igneous rocks are classified According to this. 2,3 What is strike-slip boundary This is when two plates slip past each other 2,4 What is iron and a magnetic property The core is mostly made of what And what property does it give The Earth. 3,1 What is a foliated rock When metamorphic rock contains stripes or bands 3,2 What are igneous rocks Rocks formed from molten rock. 3,3 What is a mid-ocean ridge Underwater mountain chain created when two plates separate 3,4 What is oceanic crust? This crust is thinner and more dense than the other type of crust. 4,1 What are porphyritic rocks These rocks consist of large crystals scattered on a Background of much smaller crystals 4,2 What is the Latin word for leaf The word foliated comes from The Latin word for what. 4,3 What are lithospheric plates These are mostly found under the ocean 4,4 What is pangaea? The theory that all seven continents was once a big super continent 5,1 What are fine-grained igneous rocks The texture of rocks that form fast and are extrusive 5,2 What are unfoliated rocks. Rocks that are not banded and Don’t break into layer are this. 5,3 What is the theory of plate tectonics? The earth is made up of small segments and are floating on a layer of liquid rock. 5,4