Tectonic.
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Seafloor spreading is caused by the movement of tectonic plates away from each other at mid-ocean ridges. As the plates separate, magma rises to the surface, solidifies, and creates new oceanic crust. This process is part of the theory of plate tectonics.
Three types of evidence supporting the idea of seafloor spreading include magnetic striping of the ocean floor (paleomagnetism), the presence of young volcanic activity near mid-ocean ridges, and the discovery of deep-sea hydrothermal vents that release hot mineral-rich water. These pieces of evidence suggest that new oceanic crust is continuously forming at mid-ocean ridges and spreading outward.
Sea floor spreading is primarily found along divergent boundaries, where tectonic plates move away from each other. As the plates separate, magma rises from the mantle to create new oceanic crust at the mid-ocean ridges. This process contributes to the continuous expansion of the ocean basins.
The plate boundary that causes mountains to form is called a convergent boundary.
Cirrostratus clouds are wispy, thin sheets of ice crystals found spreading at high elevations. These clouds are typically located above 20,000 feet and are associated with upcoming weather changes.
This would be an example of a negative correlation, where as one variable (air temperature) increases, the other variable (activity of test animals) decreases.