Which of the following is evidence of plate tectonics?
Material in the mantle is constantly circulating as a result of heat within the mantle. As the partially molten rock flows, the tectonic plates move as well. Other evidence of plate tectonics include Seafloor spreading, which involves the creation of new crust at divergent plate boundaries.
Which of the following is evidence of plate tectonics quizlet?
Earthquakes and volcanic activity are also evidence of plate tectonics. Divergent and convergent boundaries are both prone to frequent volcanic activity.
What is the importance of plate tectonics to the survival of the earth and its inhabitants?
Earth’s oceans might not exist if water were not periodically subsumed by the planet’s mantle and then released. Without plate tectonics driving the creation of coastlines and the motion of the tides, the oceans might be barren, with life-giving nutrients relegated forever to the stygian depths.
What is the relation between volcanic activity and plate tectonics?
In hot spots beneath the ocean, the tectonic activity creates a volcanic mound. Over millions of years, volcanic mounds can grow until they reach sea level and create a volcanic island. The volcanic island moves as part of its tectonic plate. The hot spot stays put, however.
What are the three types of plate boundaries Class 9?
There are three main types of plate boundaries:
- Convergent boundaries: where two plates are colliding. Subduction zones occur when one or both of the tectonic plates are composed of oceanic crust.
- Divergent boundaries – where two plates are moving apart.
- Transform boundaries – where plates slide passed each other.
What happens when two tectonic plates separate?
The plates diverge and this causes the construction of new rock. It happens when two tectonic plates pull apart and rock from the mantle rises up through the opening to form new surface rock when it cools. It happens at the start of a new ocean and continues at the mid-ocean ridge while the ocean is opening.