Evidence of Continental Drift
vocabulary words
Layers of Earth
The ocean floor
more Layers of Earth
Plate tectonics
100
What are the 4 types of evidence of continental drift?
climate, puzzle-like fit, rock clues, fossils
100
What is continental drift?
the hypothesis that all the continents were one and drifted apart.
100
What is the outermost layer of Earth
crust
100
ROCKS are ______________________the CLOSER they are located to the mid-ocean ridge
younger
100
What are the main layers of the Earth?
100
How do plates move at a divergent boundary?
Plates move apart
200
Explain how puzzle-like fit is evidence of continental drift
continents fit together like a puzzle
200
What is the name of Wegener's supercontinent?
Pangea
200
What is the largest layer of Earth
mantle
200
Where does the mid-ocean ridge form?
At a divergent boundary where 2 oceanic plates are moving apart.
200
What are the 3 layers of the mantle?
lithosphere, asthenosphere, and lower mantle
200
What are 3 main types of plate boundaries?
convergent, divergent, transform
300
Explain how fossils are evidence of continental drift
Fossils of freshwater reptiles were found on different continents. Mesosaurus
300
What is a trace of an ancient organism preserved in rock?
fossil
300
What is the thinnest layer
crust
300
What is formed when two oceanic plates move APART?
mid-ocean ridge
300
What are the 2 parts of the core?
outer core and inner core
300
How do plates move at a convergent boundary?
plates move together
400
How is climate evidence of continental drift?
Glacial scrapes are found across continents where there are no glaciers, like Africa.
Warm weather plant fossils found in cold climates. Glossopteris
400
What is the theory of plate tectonics?
Pieces of the Earth's lithosphere are in slow constant motion, driven by convection currents
400
Which is the hot liquid layer
outer core
400
In a convection current, a fluid becomes LESS DENSE or MORE DENSE as it is heated?
a fluid becomes LESS DENSE as it is heated
400
What creates the Earth's magnetic field?
Movement in the outer core
400
What landforms are created at a convergent boundary?
mountains, deep sea trenches, volcanoes
500
How are rock clues evidence of continental drift?
Rock layers and mountain ranges match up
500
How is new ocean crust formed?
seafloor spreading
500
Which is the solid layer
inner core
500
How does the ocean floor move as it carries the continents with them?
like a conveyor belt
500
Which layer has hot liquid?
outer core
500
What 2 landforms are created at a divergent boundary?
rift valleys and mid-ocean ridges
