rocks Flashcards
what is the crust?
the crust is the thin and rocky layer we stand on
what is the mantle?
the layer underneath the mantle which is as hard as a rock but slowly flows
what is the outer core?
the outer core is the layer of mainly molten iron and nickel which surrounds the inner core
what is the inner core?
the inner core is a solid imperfect sphere of solid iron and nickel which gives earth it’s magnetic field
what are igneous rocks?
igneous rocks are rocks formed by cooled lava etc obsidian
what are sedimentary rocks?
sedimentary rocks are rocks formed by water putting pressure on small rocks and attaches them together this is called cementation etc limestone
what are metamorphic rocks?
metamorphic rocks are rocks formed from high pressure or heat not melting the rocks but changing the mineral form etc marble