A
This technology uses sound waves to measure the distance of the object from the source of sound. It helped us discover mid ocean ridges.
What is sonar mapping?
This layer is composed of Al, Fe, Ca, Na, K, & MgO
What is the mantle?
What is the effect created as the Asthenosphere is heated and rises and then cools and falls back down? Hint: This is a driving force behind plate tectonics.
What are convection currents?
This portion of Earth's layers is solid, thin, and made of dense rock called basalt.
What is the oceanic crust?
Why continental drift theory was rejected initially by the scientific community?
They could not explain how continents moved.
Two types of information scientists got from samples of oceanic crust obtained from deep sea drilling.
What are age and magnetic polarity (alignment of magnetic minerals in the rock)?
What effect does pressure have on matter?
Choose from: expansion, compaction, liquefication, evaporation
What is compaction?
The three types of evidence Wegener used to support the theory of continental drift.
What are landforms, fossils, and climate?
What is the effect of oceanic-oceanic divergence? (Give me a name)
What are are mid ocean ridges/seafloor spreading
Plates at this kind of plate boundary slide past one another.
What is a transform plate boundary?
This layer is made of iron and nickel
What is the core?
Polarity that aligns with the current orientation of the magnetic poles
What is normal polarity?
Polarity opposite the current orientation of the magnetic poles
What is reverse polarity?
A phenomenon in which the ocean floor acts like a conveyor belt, spreading from either side of a Mid-Ocean Ridge
What is seafloor spreading?
What is a divergent plate boundary?
Two technologies that led to the theory of plate tectonics
What are deep sea drilling & sonar?
Plates at this kind of plate boundary come together.
What is a convergent plate boundary?
Scientists believe this layer is responsible for the Earth's magnetic field
What is the outer core?
This layer is solid & brittle. The crust and upper mantle form this layer.
What is the lithosphere?
Scientists believe this layer is largely responsible for the Earth's gravitational pull
What is the inner core?
What is the effect of continental-oceanic convergence? (Give me a name)
What are subduction zones?
The formula for density
What is D=M/V?