Science 10|Q1 UT
German geologist, researcher and meteorologist
Alfred Wegener
Derived from the greek word tektonikkos which means to build
Tectonic
The outermost kayer of the Earth that composed of crust and upper part of mantle
Lithosphere
The uppermost layer of the Earth that composed of varius rocks and sediments floating above mantle
Crust
Thicker and made up of granite rocks and less dense
Continental crust
Denser, Thinner, made up of basalt rock
Oceanic Crust
Major plates
Eurasia
North America
South America
Pacific
India
Africa
Antartica
Minor plates
Philippines
Juan de Fuca
Cocos Mazca
Scotia
Arabian Plates
Proposed by Alfred Wegener and it states that in 250 yrs ago,all of the continents where combined into a super continent
Continental Drift Theory
The edges where two plates meet and this is where most geological activities takes place at the plate boundaries where 2 enormous peices of solid lithosphere interacts
Plate Boundary
The plate are moving apart
Divergent Plate boundary
As they diverge, the mid ocean ridges are created where new oceanic crust are created
Divergent plate boundary
Are responsible for driving the motion of the plates
Divergent
The two plates are colliding
Convergent
Plates are sliding past each other without a gap opening between the plates
Transform Plate Boundary
Famous Transform Plate Boundary
San Andreas
Shaking of the ground due to the plate movement
Earthquake
Point on the earths surface located above the focus
Epicenter
The point inside the earth where the rock breaks off and pressure is released, origin of the earthquake, located below the ground
Focus
A crack in the Earth crust alongwhich the rocks slide
Fault
The location below the earths surface where on earthquake rapture begins
Hypocentre
Categorize the amount of energy released during an earthquake
Magnitude
Severity of the earthquake shaking
Intensity
Records made by seismograph
Seismogram
A very sensitive instrument used to detect and record vibrations sent out by earthquake
seismograph
Compress and pull the rocks in a particular direction
P-Waves
Causes the rock to move at right angle
S-Waves
Move in two direction as they pass through the rocks
Surface Wave