Why do earthquakes and volcanoes occur at plate boundaries? A.Plate boundaries undergo much tension and friction. B.Temperatures fluctuate greatly at plate boundaries. C.Earthquakes and volcanoes cause new plates to form. D.The causes of earthquakes and volcanoes are unknown.查看答案更多“Why do ea...
During subduction, as one plate dives into the depths beneath another, we think part of the rock melts and eventually finds its way back to the surface in the form of volcanoes. In fact, most of the world"s volcanoes and earthquakes occur at plate boundaries. This is what you"d expect....
Why do earthquakes happen?Scientists explain that the outside of the earth is made of a number of different plates(极块).For example,at San Francisco the Pacific Plate which is moving towards the northwest meets the North American Plate.The Pacific Plate is moving very slowly-at 5.3 centimet...
On the West Coast, it can be possible to determine exactly which fault line a quake originated along, the USGS said, because of how well-studied some plate boundaries like the San Andreas fault are. But on the East Coast, the nearest plate boundaries are in the center of the Atlantic Oce...
语言素材: Why do earthquakes happen? Scientists explain that the outside of the earth is made of a number of different plates. At San Francisco, the Pacific plate which is moving towards the northwest meets the North American plate. The Pacific plate is moving very slowly--at 5.3 centimeters...
Why do earthquakes occur before a volcano erupts? Why do earthquakes often happen near volcanic regions? Why are most earthquakes and volcanoes at plate boundaries? Why is Mount Pinatubo considered an active volcano? Why do tectonic plates exist? Why do tectonic plates move? Why do most earthquak...
Earthquakes may happen anywhere on the earth. The surface of the earth has many plate pieces (板块). These plates are always moving. When two plates move past each other, there is an earthquake. Many earthquakes begin under the sea. They often happen near the moun...
Conversely, in places where the plates collide—called convergent boundaries—one plate will often slide under the other. This process, called subduction, produces many of the planet's mountain ranges and volcanoes. Subduction can be a violent process. It's no coincidence that mostundersea earthqua...
The Pacific Plate is slowly speading away from its neighbors. (Map by John Nelson from NASA Visible Earth satellite imagery and tectonic plate boundaries from Hugo Ahlenius) Slide 1Slide 2Slide 3 Transformation and Destruction For starters, what happens in the ocean doesn’t stay in the ocean...
of Fire) is an area where large numbers of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. In a 40,000 km (25,000 mi) horseshoe shape, it is associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts and/or plate ...