Continental Drift and random
Is continental crust felsic or mafic?
Felsic
What type of currents are located under the lithosphere that cause the plates to move?
Convection currents
What kind of plate boundary is located at the San Andreas Fault?
Transform
What happens to pressure, temperature, and density as you get further into the Earth's core?
Increases
If you are closer to a ridge, the age of the bedrock is young or old?
Young
Name a piece of evidence for the theory of continental drift.
Fossils, continents appear to fit together like a puzzle, mountain evidence.
Name one hotspot. What comes out of a hotspot?
Answers vary, magma/lava.
At the Nazca Plate and South American Plate, what type of plate boundary exists?
Name this trench
Convergent, Peru-Chile Trench
5500 - 5700
At which type of plate boundary does subduction occur?
Convergent
Is there a lot of tectonic activity in New York? Why or why not?
No, we are located in the center of a large plate
What caused Africa to separate from South America?
Continental Drift
At which type of plate boundary does seafloor spreading occur?
Divergent
What is the temperature and pressure at the boundary between the Earth's stiffer mantle and outer core?
Pressure: 1.5
Temperature: 5,000
A trench exists between which 2 plates?
a) South American and African
b) Indian-Australian and Pacific
c) Eurasian and North American
d) Pacific and Antarctic
b) Indian-Australian and Pacific
Density Composition
Continental Crust _______ ____________
Oceanic Crust _______ ____________
Density Composition
Continental Crust 2.7 Granite
Oceanic Crust 3.0 Basalt
Correctly draw convection currents.
<---- ---->
^ ^
l l
What is features are found along plate boundaries?
Volcanoes, Earthquakes
Which layer of Earth has convection currents?
Asthenosphere
As you get further from the Mid Atlantic Ridge, the age of the rock becomes ____________________
older.
What layer of the Earth's Interior is the pressure inferred to be 1.0 million atmospheres?
Stiffer Mantle
Which 2 layers of the Earth are solid? Which 3 layers are liquid?
Solid: Lithosphere (crust), inner core
Liquid: Asthenosphere, stiffer mantle, outer core
Name 2 specific plate names where there is subduction. Which plate subducts there?
answers vary
What is the pressure in Earth's Interior where the rock has a density of 9.9 - 12.2 g/cm3?
1.4 - 3.1
Parallel strips of igneous rocks on each side of a ridge show matching reversals of __________________ _______________________
magnetic polarity