An object in motion needs less force
to continue moving because the inertia or the resistance to change in motion
was already overcome and the sliding friction that opposes a moving object is
also lesser. Therefore, <span>it is easier to
move an object at constant velocity as you only need to overcome the resisting
forces of the object.</span>
Answer: Winds are primary energy source for currents that flow horizontally in the ocean surface layers (less than 100 to 200 m deep). Hence surface currents often called “wind driven currents” or “wind drift currents”.
Currents that flow deep in the oceans below the level affected by winds are generated by convection caused by variations in water density. Higher-density waters sink and displace (push aside or up) less –dense water. Because density is determined by temperature and salinity, deep-water circulation is called “thermohaline circulation”.
The winds are the primary source for both ‘wind driven circulation’ and ‘thermohaline circulation’ is the sun. Winds are generated by the density variations in the earth’s atmosphere caused by solar heating and radiative and evaporative cooling.
Thermohaline circulation is driven by density difference between ocean water masses caused by temperature and salinity variations.
Explanation:
This is the main cause to form a wave over the sea surface.
<span>Might support large shellfish fisheries as well as acting as nurseries for young fish.</span>