MEA 200 Exam 1 – Key Topics & Practice
(NCSU).
1. big bang -still energy left from explosion
-discovered in 1960s
-assumes earth came from material
-Kant created most pop model of formation (planet accretion)
1/
16
, MEA 200 Exam 1 – Key Topics & Practice
(NCSU).
2. nebula beginning form of planets
many bump into others and combine
3. earths -more dense material in center
composi- tion
-heterogeneous (bc heat and dense elements melt and flow)
-accretion
-compression
-radioactive decay
4. 3 layers of earth -based on composition
-core, mantle, crust
-metallic core sank to center
5. lithosphere -rigid outer covering
-crust and top of mantle
-tectonic plates
6. asthenosphere -weak solid that flows
-bottom of mantle
-tectonic plates float on it
7. moon -likely broke ott of earth
-small planet hit earth and tilted it
-chunk (moon) broke ott
8. Alfred Wegener 1915- continental drift
-200 mill years ago: pangea
2/
16
, MEA 200 Exam 1 – Key Topics & Practice
(NCSU).
9. Wegener's 1- puzzle piece fit of continents
evi- dence 2- similar mtn ranges/fossils across oceans ( palm fossils
antarctica/tropics)
3- large glacier boulders in tropics
4- same species btw continents
10. Alexander Du Toit "our Wandering Continents"
-developed Wegener's arguments
11. Benioff zones data from 1920-60
-plotting earthquakes and volcanoes
-center of ocean/tracing continents
-magnetic reversal patterns on seafloor
12. Harry Hess -sea floor spreading
-echo-sounding surveys during WWII in Pacific
-idea: new crust produced at mid ocean ridges and consumed in deep sea
-magnetic patterns backed up
13. Wilson cycle -John Tuzo Wilson
-plate tectonics model
-refers to once sequence of evernts leading to: formation, growth/expansion,
destruction?contraction, elimination of basins
14. forming ocean -uplift and expansion
basins 1-
-ex: east africa rift valleys
embry- onic
ocean
-subsidence and spreading
15. forming ocean
-no subduction
basins 2-
-constructive plate margin formation
juvenile ocean
-ocean crust development in rift
3/
16
(NCSU).
1. big bang -still energy left from explosion
-discovered in 1960s
-assumes earth came from material
-Kant created most pop model of formation (planet accretion)
1/
16
, MEA 200 Exam 1 – Key Topics & Practice
(NCSU).
2. nebula beginning form of planets
many bump into others and combine
3. earths -more dense material in center
composi- tion
-heterogeneous (bc heat and dense elements melt and flow)
-accretion
-compression
-radioactive decay
4. 3 layers of earth -based on composition
-core, mantle, crust
-metallic core sank to center
5. lithosphere -rigid outer covering
-crust and top of mantle
-tectonic plates
6. asthenosphere -weak solid that flows
-bottom of mantle
-tectonic plates float on it
7. moon -likely broke ott of earth
-small planet hit earth and tilted it
-chunk (moon) broke ott
8. Alfred Wegener 1915- continental drift
-200 mill years ago: pangea
2/
16
, MEA 200 Exam 1 – Key Topics & Practice
(NCSU).
9. Wegener's 1- puzzle piece fit of continents
evi- dence 2- similar mtn ranges/fossils across oceans ( palm fossils
antarctica/tropics)
3- large glacier boulders in tropics
4- same species btw continents
10. Alexander Du Toit "our Wandering Continents"
-developed Wegener's arguments
11. Benioff zones data from 1920-60
-plotting earthquakes and volcanoes
-center of ocean/tracing continents
-magnetic reversal patterns on seafloor
12. Harry Hess -sea floor spreading
-echo-sounding surveys during WWII in Pacific
-idea: new crust produced at mid ocean ridges and consumed in deep sea
-magnetic patterns backed up
13. Wilson cycle -John Tuzo Wilson
-plate tectonics model
-refers to once sequence of evernts leading to: formation, growth/expansion,
destruction?contraction, elimination of basins
14. forming ocean -uplift and expansion
basins 1-
-ex: east africa rift valleys
embry- onic
ocean
-subsidence and spreading
15. forming ocean
-no subduction
basins 2-
-constructive plate margin formation
juvenile ocean
-ocean crust development in rift
3/
16
