earths layers Flashcards
The crust is less than____ of earths total mass
1%
the earth is mostly made of___ with the main elements of ____, ______, _____
rock, silicon, calcium,sodium
what are the 2 types of crust
oceanic and continental
the mantle makes up ____ of earths mass
68%
the mantle is HOT,____ and have heavy metals like ___ and _____
dense, iron, magnesium
how thick is the mantle
2,900km thick
the core is about____ of earth mass
31%
the core is mostly made up of ____ and ____
iron and nickle
there are two parts of the core the _____ inner and ____ outer
solid and liquid
the lithosphere is a ____ solid that is easily,_____ = very brittle
ridgid , broken
the lithosphere is made up of the ____ and the upper part of the ______
crust, mantle
the asthenosphere is a flexible layer that can ____ and ____
bend and flow
The asthenosphere is located in the upper _____ under the lithosphere
mantle
the earths crust is _____ under the ocean and _____ under the mountain
thinner and thicker
the oceanic crust is mostly made up of _____ a type of ____ rock that typically comes from lava
basalt, igneous
Continental crust is thicker but has very low ____. it contains all __ rock types
density, 3
the core is metallic __% is made up of ___, the remainder is ___% ______
85, iron, 15, nickle
a __________ is the closest thing that we can touch that is like the core
Iron meteorite
s waves can only travel through ____
solids
for a __________ to form there must be a _______ flow through the liquid
magnetic field, convection ____ that kepps the outer core from becoming a solid is produced by the breakdown of _________
the ____ that keeps the outer core from becoming a solid is produced by the breakdown of _________ in the inner core
heat , radioactive elements
the deepest hole that we have drilled into the crust is
12 km
we know about the inside of the earth due to _______
seismograph
temperature inside the mantle reaches
3000 c
the cores temps exceed
3,200c
