Answer:
The active volcanoes are gradually moving away from the oceanic ridge.
Explanation:
- Many oceanic volcanoes occur as long lines of the active end of volcanoes as here in the mid-oceanic ridges the plate is pushed far away from the ridge surface of the earth as these tend to move out in the direction of the movement of the plates.
- Thus the volcanoes are generally found near the active zones or regions of the tectonic plate and associated with the earthquakes occurring on the fault line or shear lines of the plates.
- Spreading of the ridges as a result of the seafloor spreading takes place and the mantel and plates from below are the driving forces that make the volcanoes and convection current that rises through the mantle pushes or spread the volcanoes to the sides like seen in the ring of fire.
Two plates that are made up mostly of oceanic crust are the Pacific plate and the Nazca plate.
Explanation:
There are numerous tectonic plates that divide the surface of Earth, and they can be divided into oceanic plates and continental plates. Another division commonly used is major plates. minor plates, and micro plates. The oceanic plates are plates that are mostly made up of oceanic crust, and the land masses on them are consisted of island arcs, mostly of volcanic origin. Some of the oceanic plates are:
- Pacific plate
- Nazca plate
- Cocos plate
- Caribbean plate
- Scotia plate
The Pacific plate is the largest oceanic plate, and it is a major plate. It is dominated by ocean, with numerous island chains scattered across it. This plate is shrinking from all sides as it has subduction zones with all of the continental plates that surround it. The Nazca plate is another oceanic plate, being located between the South American and Pacific plates. It is a minor plate, and it has a subduction zone with the South American plate, which has resulted in the formation of the Andean Mountain Range.
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Answer:
Athenian democracy developed around the 6th century BC in the Greek city-state (known as a polis) of Athens, comprising the city of Athens and the surrounding territory of Attica. Athenian democracy is often described as the first known democracy in the world. Other Greek cities set up democracies, most following the Athenian model, but none are as well documented as Athens' democracy.
Explanation:
Answer:
Green algae, which is also known as chlorophyta belongs to the phyla Thallophyta.
