Why don't volcanic arcs form at transform plate boundaries?(1 point)
Responses
A. Plates that pull away from each other produce earthquakes but not volcanoes.
B. Plates sliding past each other destroy all landforms at their edges.
C. Plates sliding past each other do not produce large pools of rising magma.
D. Plates that push together don't form volcanoes.
C. Plates sliding past each other do not produce large pools of rising magma.
The oldest of Hawaii's volcanic islands are those that(1 point)
Responses
have not yet reached the hotspot.
are the farthest distance from the hotspot.
are on top of the hotspot.
are a short distance past the hotspot.
are the farthest distance from the hotspot.
Which is caused by the difference in density of oceanic and continental plates?(1 point)
Responses
pyroclastic flows
subduction
rift valleys
hotspots
subduction
The correct answer is C. Plates sliding past each other do not produce large pools of rising magma.
To understand why volcanic arcs don't form at transform plate boundaries, we need to first understand what happens at these boundaries. Transform plate boundaries occur when two plates slide past each other horizontally, such as the San Andreas Fault in California.
Unlike convergent plate boundaries (where plates collide) or divergent plate boundaries (where plates move apart), transform plate boundaries do not involve the creation or destruction of crust. Instead, they mainly accommodate horizontal motion and result in earthquakes.
Volcanic arcs, on the other hand, are typically formed at convergent plate boundaries, where one tectonic plate subducts (dives beneath) another plate. In this process, the subducting plate is forced deep into Earth's mantle, where it starts to melt due to the high temperatures and pressures. The melted rock, or magma, then rises to the surface, forming volcanoes.
At transform plate boundaries, there is no subduction occurring. The plates are simply sliding past each other, causing rocks to grind and slip along fault lines, leading to earthquakes. Without the process of subduction and the creation of large pools of rising magma, volcanic arcs do not form at transform plate boundaries.
Therefore, the correct answer is C. Plates sliding past each other do not produce large pools of rising magma.