It should be noted that a volcanic arc results from ridgeconvergent while tectonic movements and is associated with mid ocean ridge.
<h3>What is a volcanic arc ?</h3>
A volcanic arc can be regarded as a chain of volcanoes, which some miles long and it is usually formed above a subduction zone.
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Answer:
They allow users to layer map information from different sources.
Explanation:
Geographic information system is important today because it allows users to layer map information from different sources one on top of another.
- A geographic information system gathers, stores, visualize and interprets spatially aware data.
- The spatial attribute of its data makes it different from every other information systems or statistical tool out there.
- The system is made up of the hardware, software and the people ware.
- The hardware is usually the computer, gps devices and so on used to collect and interact with data.
- The software is the environment where the data is stored and interpreted using some applications on the computer.
- People ware refers to the human technician that interprets the data.
Geographic information system can overlap multiple map layers to make for more robust interpretation.
<span>Scientists choose where are units of time began and ended based on major changes in life forms at certain times</span>
Answer:
The upwelling of seawater refers to the rising up of the deeper and cold water towards the surface of the sea. This cold water is comprised of the valuable and essential nutrients and as they move upward, it provides these nutrients to the marine organisms.
El Nino is usually defined as the large-scale changes in the climate that occurs due to the interaction between the ocean and the atmosphere. It leads to the episodic rise in the temperature of the sea surface, which typically occurs in the central and the eastern part of the central Equatorial Pacific.
The occurrence of El Nino leads to the reduction of the upwelling of deep-sea cold water. During the time of this harsh climate, the fishes die or they sometimes migrate into some other places where they can obtain their food. Due to this, the fisherman cannot go fishing.
Thus, the occurrence of El Nino directly affects a fisherman's life.
A high pressure area is an area where the air sinks. As it does, it warms up by the adiabatic effect of a greater pressure and that causes the clouds to evaporate, giving place to a clear sky
