What are the 4 types of evidence of continental drift?
climate, puzzle-like fit, rock clues, fossils
What is continental drift?
the hypothesis that all the continents were one and drifted apart.
What is the outermost layer of Earth
crust
ROCKS are ______________________the CLOSER they are located to the mid-ocean ridge
younger
What are the main layers of the Earth?
How do plates move at a divergent boundary?
Plates move apart
Explain how puzzle-like fit is evidence of continental drift
continents fit together like a puzzle
What is the name of Wegener's supercontinent?
Pangea
What is the largest layer of Earth
mantle
Where does the mid-ocean ridge form?
At a divergent boundary where 2 oceanic plates are moving apart.
What are the 3 layers of the mantle?
lithosphere, asthenosphere, and lower mantle
What are 3 main types of plate boundaries?
convergent, divergent, transform
Fossils of freshwater reptiles were found on different continents. Mesosaurus
What is a trace of an ancient organism preserved in rock?
fossil
What is the thinnest layer
crust
What is formed when two oceanic plates move APART?
mid-ocean ridge
What are the 2 parts of the core?
outer core and inner core
How do plates move at a convergent boundary?
plates move together
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
What is the theory of plate tectonics?
Pieces of the Earth's lithosphere are in slow constant motion, driven by convection currents
Which is the hot liquid layer
outer core
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
What creates the Earth's magnetic field?
Movement in the outer core
What landforms are created at a convergent boundary?
mountains, deep sea trenches, volcanoes
How are rock clues evidence of continental drift?
Rock layers and mountain ranges match up
How is new ocean crust formed?
seafloor spreading
Which is the solid layer
inner core
How does the ocean floor move as it carries the continents with them?
like a conveyor belt
Which layer has hot liquid?
outer core
What 2 landforms are created at a divergent boundary?
rift valleys and mid-ocean ridges