EARTH Flashcards
(23 cards)
it is transdisciplinary, meaning it draws knowledge from many different fields.
ESS (Earth System Science)
its structure can be defined mechanically and chemically
EARTH
the study of the flow of matter
RHEOLOGY
deformation under stress (reversible)
PLASTIC FLOW
deformation under stress (irreversable)
ELASTIC DEFORMATION
mechanically structure od earth
– LITHOSPHERE
– ASTHENOSPHERE
– MESOSPHERIC MANTLE
– OUTER CORE
– INNER CORE
chemically structure of earth
– CRUST
– UPPER MANTLE
– LOWER MANTLE
– OUTER CORE
– INNER CORE
how thick is crust
5km to 8km
most dominant element in crust
OXYGEN (46.6%)
average temperature on crust
870 °C
the largest layer of earth
MANTLE
it is about 80% of Earth’s mass
MANTLE
thickness of upper mantle
660km
thickness of lower mantle
2200km
average temperature on mantle
3700 °C
consist of molten metals and rocks. ball of molten metals
OUTER CORE
about 5000 °C to 6000°c
INNER CORE
creates the magnetic field of the Earth. gives protection from the harmful rays of sun
DYNAMO EFFECT
he coined the term “biosphere”
VLADIMIR VERNADSKY
thought of the universe as one interconnected entity
BARON FRIEDRICH HUMBOLDT
developed Gaia Hypothesis — biosphere is a self-regulating system.
JAMES LOVELOCK AND LYNN MARGULIS
ancient greeks declared Earth’s diameter as
12, 750 km
the boundary between crust and mantle
MOHOVORICIC DISCONTINUITY
