Along which features does seafloor spreading occur?(1 point)
Responses
ocean basins
ocean basins
ocean trenches
ocean trenches
fault lines
fault lines
mid-ocean ridges
mid-ocean ridges
Why is no land created or destroyed at transform boundaries?(1 point)
Responses
because magma rushes into gaps at these boundaries
because magma rushes into gaps at these boundaries
because the plates only slip past each other at these boundaries
because the plates only slip past each other at these boundaries
because the plates are more dense at these boundaries
because the plates are more dense at these boundaries
because the plates crumble into each other at these boundaries
because the plates only slip past each other at these boundaries
Iron particles in basalt on the ocean floor tell scientists [the direction of the magnetic field / the direction the plate is moving]. In two adjacent magnetic stripes, the iron particles show [different / the same] alignments.
Iron particles in basalt on the ocean floor tell scientists the direction of the magnetic field. In two adjacent magnetic stripes, the iron particles show different alignments.
Which statement identifies a major reason for the subduction that helps to form volcanoes?(1 point)
Responses
the upwelling of magma between diverging plates
the upwelling of magma between diverging plates
the release of hot ash and steam in a pyroclastic flow
the release of hot ash and steam in a pyroclastic flow
the difference in density of oceanic and continental plates
the difference in density of oceanic and continental plates
the unusually high temperature at hotspots
the difference in density of oceanic and continental plates
In trying to prove continental drift, Alfred Wegener used evidence from long ago to show that in the distant past, similar animal species lived in places that are [seperated by great distances / no longer in existence / now underwater / on different tectonic plates] today. For example, fossils of the [Mesosaurus / Lystrosaurus / Tyrannosaurus / Glossoptera] were found in India, Africa, and Antartica.
In trying to prove continental drift, Alfred Wegener used evidence from long ago to show that in the distant past, similar animal species lived in places that are separated by great distances today. For example, fossils of the Mesosaurus were found in India, Africa, and Antarctica.
Which features do most stratovolcanoes and cinder cone volcanoes have in common?(1 point)
Responses
steep sides and violent eruptions
steep sides and violent eruptions
broad base with quiet eruptions
broad base with quiet eruptions
wide dome shape and thick lava
wide dome shape and thick lava
violent eruptions and thin, flowing lava