Dynamic Earth Sci 8
Pangaea
Geologists believe that millions of years ago all of the continents were united into a single supercontinent
element found in Earths Outer and Inner core
Iron, Fe
The Sun
Is the major source of energy for the Earth's surface
P-waves, only
earthquake waves can travel through both solids and fluid
Analysis of the earthquake wave data
has led scientists to conclude that there are different layers within the Earths interior
the earth's water layer
hydrosphere
The relatively thin layer of rock at the Earth's surface is called the
lithosphere
Geologic studies of the San Andreas fault indicate that
many earthquakes occur along the fault
Earth's layer contains convection currents that are believed to be responsible for the movement of Earth's tectonic plates
Mantle
Layer of the Earth that produces the hot rising magna which eventually erupts from volcanoes
Mantle
Earth's third layer and is a liquid
Outer core
seafloor spreading
The magma in the mantle rises through the cracks in the ocean floor
epicenter
The point on the Earth's surface that lies directly above the site where an earthquake took place
theory of continental drift
The present continents appear to fit together like puzzle pieces of a larger landmass.
The ocean crust is thinner than the continental crust.
True
near a fault zone
Where are earthquakes most likely take place
earthquakes occurred most frequently
along the Pacific Ocean coastlines
the earth's air layer.
atmosphere
The primary cause of continental drift, earthquakes, and volcanic eruptions are
convection currents beneath Earth's crust
divergent boundary
crustal plate motion <--apart--> that is the primary cause of the volcanoes and deep rift valleys found at mid-ocean ridges
Which set of Earth processes are thought to be most closely related to each other because they normally occur in the same zones?
mountain building, earthquakes, and volcanic activity
S waves
secondary waves that only go through solids.
What usually causes tsunamis?
undersea earthquakes
