Week 2

Question 1

Hydrosphere

Answer 1

Water portion of our planet
Oceans 96.5%
Freshwater 2.56%

Question 2

Atmosphere

Answer 2

The big gas bubble that we are in

Question 3

Biosphere

Answer 3

All life on the planet

Question 4

Geosphere

Answer 4

Solid portion of the planet

Earths interior

Question 5

Magnetosphere

Answer 5

Magnetic field that comes from the inside of the earth and comes out
It is a protective layer

Question 6

Earths processes are driven from ____

Answer 6

Sun and earths interior

Question 7

Earths layers defined by chemical composition (3)

Answer 7

Crust
Mantle
Core

Question 8

Layers defined by physical properties (2)

Answer 8

Lithosphere

Asthenosphere

Question 9

Indirect methods for studying interior of earth

Answer 9

Seismic waves

Analysis of unique rocks

Question 10

The more ____ the more dense

Answer 10

Iron (more of it closer to the core

Question 11

Seismic waves

Answer 11

Energy waves produced by earthquakes

Question 12

Seismic velocities vary by ____

Answer 12

Type of wave
Type of material it’s traveling through stiff (cold) compressible(warm)
Dense/ less

Question 13

Indirect method: analyzing unique materials such as _____

Answer 13

Mantle rocks

Metiorites

Question 14

Location wave arrivals

Answer 14

P waves travel through all types of material

S waves only solid

Question 15

Continental drift

Answer 15

A hypothesis that the continents were mobile
Altered wegener
His idea was founded on strong evidence

Question 16

Wegeners 4 types of evidence

Answer 16

Fossil
Land bridge
Rock type/ geologic figures
Paleoclimate (coal swamps, ice sheets)

Question 17

Why were wegeners ideas not accepted

Answer 17

He had proof but didn’t know why.

His shape was off

Question 18

Maria Tharp/ Henzen

Answer 18

BATHYMETRIC MAPS
Co creator of the first global map of the ocean floor.
Co discoverer of the central Rift Valley through the North Atlantic ridge

Question 19

What did they use for their bathymetry map to find depth, what else did it help find?

Answer 19

Sonar, also helped to find deep trenches

Question 20

Seafloor spreading

Answer 20

A hypothesis that crust is created at mid ocean ridges and destroyed at deep ocean trenches

Question 21

Harry Hess

Answer 21

SEAFLOOR SPREADING

Used sonar

Question 22

Where are earthquakes deepest

Answer 22

Beneath deep ocean trenches, lots of earthquakes where there are deep ocean trenches

Question 23

Where is seafloor the hottest

Answer 23

Over mid ocean ridges

Question 24

What is paleomagnetism

Answer 24

Study of the earths magnetic field in rocks sediment and archeological materials

Question 25

Why does paleomagnetism work

Answer 25

Complex motions of liquid outer core generate a magnetic field

Question 26

Nebular theory

Answer 26

The bodies of our solar system evolved from an enormous rotating cloud called the solar nebula

Question 27

Explain why bouyancy And density were important to development of earths structures

Answer 27

???

Question 28

Ductile

Answer 28

???

Question 29

Mafic

Answer 29

???

Question 30

Ultra mafic

Answer 30

???

Question 31

Felsic

Answer 31

???

Question 32

View held by geologists regarding ocean basins and continents

Answer 32

They were in a fixed position and did not move

Question 33

Lithospheric plates

Answer 33

The lithosphere broken up into segments

Question 34

3 types of plate boundaries

Answer 34

Divergent Convergent Transform

Question 35

Divergent plate boundaries

Answer 35

2 plates move apart resulting in upwelling and partial melting of hot material from mantle to create new seafloor

Question 36

Convergent PB

Answer 36

2 plates move together resulting in oceanic lithosphere descending beneath, possible collision of blocks to create a mountain belt

Question 37

Transform PB

Answer 37

2 plates grind past each other without the production or destruction of lithosphere

Question 38

Wegeners reasons in video

Answer 38

They fit together like a puzzle Mountain belts Rocks/ glaciers, ice sheets were once in the same place Fossils