Layers of the Earth
What is the CORRECT order of the Earth's layers from OUTSIDE to the INSIDE?
C = Crust
L = Lithosphere
A = Asthenosphere
O = Outer Core
I = Inner Core
How do Geologist determine what the inside of the Earth is like?
They study rocks samples and seismic waves
What happens during a CONVECTION CURRENT?
heating and cooling of a fluid changes the fluid's DENSITY and the FORCE OF GRAVITY combine to set the fluid IN MOTION
Where Normal Faults happen
the Divergent Boundary
What is the ring of fire???
a volcanic belt along a plate boundaru in the Pacific Ocean
or
a series of volcanoes that have formed along the same boundary
What is the DIFFERENCE between the Earth's Outer Core and its Inner Core
The OUTER CORE is liqud metal and the INNER CORE is solid metal
Describe the theory of continental drift.
The theory from Wegner that states...
All 7 continents were once joined together in a supercontinent called Pangea, but slowly drifted apart over time!!!
Convection Currents are in the MANTLE are responsible for
(This is a glance at what you will learn more this week)
TECTONIC PLATE MOVEMENT
Where do Strike-Slip Faults happen
the Transform Boundary
What is one piece of evidence on a MAP that suggests that the continents were once joined together
The shape of the continents and the plates dividing them look like if you pushed them together they would fit together like a PUZZLE!!!
What happens to temperature and pressure as you go DEEPER into the Earth
they BOTH INCREASE!
Who came up with the continental drift theory but had a difficult time proving it?
Wegner or Alfred Wegner
Subduction of the oceans floor happens at
(This is a glance at what you will learn more this week)
TRENCHES
Where do Reverse Faults happen
the Convergent Boundary
What kind of waves ALWAYS arrive FIRST on a seismograph?
P WAVES!
Why are trilobites the oldest fossils in the diagram we saw in class
they are in the lowest layer of rock!!!
Continental drift theory states that the continents
DRIFT SLOWLY APART
Where does Sea-floor spreading begin
Mid-Ocean Ridges
What is one geological event or feature that happens when plates collide (converge) or move apart (diverge)
Earthquakes
What kind of waves ALWAYS arrive second on a seismograph?
S WAVES
how did the diagram with the trilobites and the different layers of fossils show that ALL of Earth's rock layers were not formed at the same time
the layers had different materials and different species existed when they were each created!!!
Fossils of the same organisms in different parts of the world suggest that
(This is a glance at what you will learn more this week)
CONTINENTS WERE ONCE JOINED TOGETHER
EARTHQUAKES
What kind of waves ALWAYS arrive LAST on a seismograph?
SURFACE WAVES