Planets are like onions
Drifting Apart
One of these things is not like the other
Features of the Deep
Final Jeopardy
100
The crust and the upper mantle make up this mechanical layer of the Earth
What is the lithosphere?
100
The idea that the lithosphere is in motion.
What is the theory of continental drift?
100
The Mid-Atlantic Ridge is visible above the seafloor in this location.
What is Iceland?
100
Point D on the diagram.
What is a mid-ocean ridge?
200
The mechanical layer of the Earth that has active convection currents.
What is the asthenosphere?
200
When two plates collide.
What are convergent boundaries?
200
This is the name of the island that is currently forming to the Southeast of Hawaii.
What is Lo'ihi?
200
The vast majority of the deep seafloor.
What are abyssal plains?
300
The mechanical layer of the Earth that generates Earth's magnetosphere.
What is the outer core?
300
When two plates pull apart.
What are divergent boundaries?
300
The Hawaiian Island Chain moves in this general direction.
What is Northwest?
300
Point G on the diagram.
What is a trench?
400
Unusually hot areas of the asthenosphere that break through the crust far from plate boundaries.
What are hot spots/magma plumes?
400
The four early pieces of evidence for the theory of continental drift.
What are matching coastlines, fossil continuity, mountain range continuity, and ancient climate data?
400
Plate #2, where the Hawaiian Hot Spot is located.
What is the Pacific Plate?
400
Two oceanic plates collide, forming these parallel to the resulting trench.
What is a volcanic island chain?
500
The chemical composition of oceanic crust is between 45-52% silicon dioxide and includes various other elements, but it has an average density of 2.9 g/cm3 and is known by this name.
What is basalt?
500
This guy
Who is Alfred Wegener?
500
The Midway Atoll is one of the oldest features still above the sea-level in the Hawaiian Island chain at this many years of age.
What is 27 million?
500
Caused by changes in Earth's magnetic field, these features of the ocean floor help oceanographers to understand the age of oceanic rock, and how Earth has changed over time.
What are paleomagnetic stripes?
500
Iceland is unique for its location because it is above sea-level. This is caused by a unique combination of these two mechanisms.
What is a hot spot beneath the Mid-Atlantic Ridge?