rocks
three types of rocks
sedimentary
metamophic
igneous
when lava erupts from volcano and cool to form a rock. the slower the rock cools the more crystals intrusive rocks cool slower and have more crystals and extrusive cool faster and less crystals
weathering and erosion breaks the rocks it gets transported ny the sea and deposited on the seabed and then more layers cement and compact it together
when a rock goes under heat and pressure and forms a new rock
structure of the earth
mantle
outer core
crust
inner core
outer layer supports life
molten magma 85% of eath
liquid iron + nicel
solid iron + nicel
volcanoes
magma comes out
cools and turns into a rock
keeps happening and forms a volcanoes
fossils
only in sedimentary rocks
a animal dies
body goes seabed
bones are left and sediment builds up
bones decompose and fossil is left
weathering
chemical
biological
physical
freeze thaw
freeze water in cracks it expands and cracks the rocks
acid dissolves into water and rain and attacks the rocs it lands on
humans walking animals digging and seeds dropped in rocks that grow into trees and break the rock
carbon cycle