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What escapes from cracks in the ocean floor?
Heat as well as lava can seep from cracks in the ocean floor.
What are types of evidence that the sea floor is expanding?
Rocks have a north and south pole. The sea floor was discovered to have different magnetic poles on cracks in the ocean floor.
What three pieces of evidence for Wegener's theory came from the sea floor?
seafloor spreading, age of the sea floor and ocean trenches.
Is the location where lava pours out of cracks in the ocean floor?
The mid-ocean-ridge.
An area by which heated ocean water rises through cracks in the ocean floor is?
a hydrothermal vent
What are pieces of evidence of sea floor spreading?
Pieces of evidence for sea floor spreading include the presence of mid-ocean ridges where new crust is formed, symmetric magnetic striping on either side of mid-ocean ridges, age dating of oceanic crust that shows it gets older as it moves away from ridges, and the discovery of pillow basalts and other volcanic rocks on the ocean floor.
Mineral-rich water heated by newly formed oceanic crust escapes through cracks in the ocean floor called?
Th water escapes through cracks in the ocean floor called hydrothermal vents.
What is a deep crack in the ocean floor?
huge cracks in the ocean floor are called trenches.
What is the location where lava pours out of cracks in the ocean floor?
The location where lava pours out of cracks in the ocean floor is known as a mid-ocean ridge or a spreading center. This is where tectonic plates move apart, allowing magma to rise from the mantle and create new oceanic crust.
What is the effect of magma pushing up through cracks in the ocean floor?
push and a pull
What happens at hydrothermal vents?
Seawater seeps into the ocean floor through cracks in the crust
What is sea floor spreading and what evidence do we have to prove it is happening?
Magnetic minerals on the ocean floor.
