Geosci Final Exam

Front 1

Big Bang Theory

Back 1

-Occured 15-20mya
-major explosion thought to have formed the universe
-Explosion produced A LOT of matter and heat
-T were about 1 million C
-matter cooled and condensed to form the light elements H and He

Front 2

Formation of the Solar Nebula and Planets

Back 2

a) pockets of condensed matter impload to form the SOLAR NEBULA
---SN is very hot and contains H and He
---Hot in the center and cooler on the outer regions
---out regions cool and condense into rings of matter
---center forms the sun
----rings condense and form planets
----Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto

Front 3

Terrestrial Planets

Back 3

Mercury Venus Earth Mars

these planets are very dense and consist of heavier elements:
Fe, Ni, Si, O.

Front 4

Jovian planets

Back 4

Jupiter, Saturn, Uranus, Neptune, Pluto
--less dense and contain lighter elements:
H, He, Ch4, NH3

Front 5

Early Earth

Back 5

-4.6 bya, which we know by testing meteorites found on earth
---most of these meteorites are from the the asteroid belt located between the terrestrial and jovian planets; usually found in antarctica due to easy visibility and the ice keeps them preserved
--earth was homogenous chemically
--as it cooled the heavier elements move to center
--was about 1200 degrees

Front 6

Formation of the Moon

Back 6

debree crashed into earth, parts of earth broke away, but remained in the orbit of earth

gravitational pull eventually made earth circular again

Front 7

Formation of Atm and Oceans

Back 7

Atm came from the gasses released as the earth was de-gassing: CH4 H2S H He NH3 H20
as earth continued to cool the waterv vapor condensed to form the oceans