Oceanography and Hydrology

The Labrador Current is a cold ocean current in the North Atlantic Ocean that flows from the Arctic Ocean south along the coast of Labrador.

The Gulf Stream is a powerful, warm Atlantic ocean current that originates in the Gulf of Mexico and flows along the eastern coast of North America.

The process by which water continually changes its form and circulates between oceans, atmosphere and land is known as water cycle. In the water cycle, water from oceans, lakes, swamps, rivers, plants can turn into water vapour. Water vapour condenses into millions of tiny droplets that form clouds. Clouds lose their water as rain or snow, which is called precipitation. Precipitation is either absorbed into the ground or runs off into rivers. Plants take up the water that was absorbed into the ground. Plants lose water from their surfaces as vapour that goes back into the atmosphere. Water that runs off into rivers flows into ponds, lakes, or oceans where it evaporates back into the atmosphere. This cycle continues.

Islands are not in good number at the sea coast of Africa.

Evaporation is the method to separated dissolved solid impurites in the liquid so if we evaporate sea water evaparates and common salt is left behind.

The Internal Drainage Basin is described by rivers/streams draining into a group of inland water bodies (lakes) that are located around the north-central part of the country. The system, mainly of troughs and faults runs southward from lake Natron at the border with Kenya to central Tanzania in the Bahi depression and varies in width from 30-90 km.

These bacteria in rainfall don't seem to cause any harm to humans though. 

The term 'lates' is likely a typo for 'lates' (referring to Lates calcarifer, the barramundi or Asian sea bass), which is a catadromous fish often found in estuaries.

Running water flows naturally in a direction according to gravity along the slope and makes its own way. This is called a flow of water. When many such flows of water come together, a river is formed.

The continental shelves of Lakshadweep are originated due to coral reefs. 2. The continental shelves of western coast are due to faulting and submergence.

• Corals are marine invertebrates in the class Anthozoa of phylum Cnidaria.
  
• They typically live in compact colonies of many identical individual polyps.
  
• Coral, a sessile animal, relies on its relationship with plant-like algae to build the largest structures of biological origin on Earth.
  

A group of islands is collectively called Archipelago. An island is a piece of land that is surrounded on all sides by water. Most archipelagoes are made of oceanic islands. So the islands were formed by volcanoes erupting from the ocean. The islands are considered part of a larger land mass. Places such as Hawaii and the Virgin Islands are considered to be archipelagos.

Lakshadweep Islands are the product of Reef formation. Lakshadweep is an archipelago of twelve atolls, three reefs and five submerged banks, with a total of about thirty-nine islands and islets.