Which theory best explains the present arrangement of continents?
theory of plate tectonics
What is the name of the theory that explains the movement of the continents and oceans?
What statement is true about the theory of plate tectonics and the theory of continental drift?
Plate tectonics is the scientific theory proposed by scientist Alfred Wegener in 1960. This theory substantiate the fact that the a large landmass got splitted and drifted into continents which were drifted to different locations from the site they were originated. The theory provides the reason for continental drift.
What is the name of the theory that explains the shifting of the Earth’s continents?
How did Pangea split?
Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle. About 200 million years ago Pangaea broke into two new continents Laurasia and Gondwanaland.
What will happen if tectonic plates are not moving?
One big problem with plate tectonics stopping is that plate motion is the mechanism by which Earth is cooling down and getting rid of its internal heat. If the plates stopped moving, the planet would have to find a new and efficient means to blow off this heat.
What happens when the Earth’s plates move?
When the plates move they collide or spread apart allowing the very hot molten material called lava to escape from the mantle. When collisions occur they produce mountains, deep underwater valleys called trenches, and volcanoes. The Earth is producing “new” crust where two plates are diverging or spreading apart.
Is it safe to live near divergent boundaries?
Explanation: Most of the hazards that characterize a divergent plate boundaries lie under the ocean but on land the hazards are faults, volcanoes , and the most obvious one; earthquakes. These are also known as conservative boundary because the plates grind past one another, not destroying the lithosphere.
Do divergent boundaries cause volcanoes?
Most volcanoes form at the boundaries of Earth’s tectonic plates. The two types of plate boundaries that are most likely to produce volcanic activity are divergent plate boundaries and convergent plate boundaries. Divergent Plate Boundaries. At a divergent boundary, tectonic plates move apart from one another.
What are examples of divergent boundaries?
- Mid-Atlantic Ridge.
- Red Sea Rift.
- Baikal Rift Zone.
- East African Rift.
- East Pacific Rise.
- Gakkel Ridge.
- Galapagos Rise.
- Explorer Ridge.
What landforms are created at divergent boundaries?
Two landforms that are created from divergent boundaries are rift valleys and mid-oceanic ridges.