The Earth revision Flashcards
give 2 reasons for the Cambrian explosions
increase in oxygen
increase in erosion
What is the Anthropocene
new epoch that is being created because of humans
Define Goldilocks zone
earth being in a perfect position from the sun and to produce life
the middle layer ?
Inner core
the outside layer of earth ?
crust
theory of Continental drift
Fossil evidence
theory of Continental drift
Geological deposit
the 2nd layer ?
mantle
theory of Continental drift
Jigsaw fit
the 3rd layer ?
Outer core
how long ago did the earth form ?
4.6 Billion Years Ago
what characteristics does the crust have
solid, outer layer of the earth, between 5 and 125km thick. It is
either continental or oceanic and is divided into large segments
called plates
what characteristics does the mantle have?
the layer of the earth between the crust and the core. It extends to
a depth of 2900km and is mostly made of silicates, iron and
magnesium.
what characteristics does the inner core have?
mostly
solid under extreme temperature and pressure,
what characteristics does the outer core have ?
an outer core,
mostly liquid, both composed of iron and nickel.
