Social Science Question(1 Marks)

Ocean currents are streams of water flowing constantly on the ocean surface in definite directions.

The rhythmic rise and fall of ocean water twice in a day is called a tide. The strong gravitational pull exerted by the sun and the moon on the earth’s surface causes the tides.

Temperature, density and salinity, storm, earthquake, a volcanic eruption or underwater landslides, gravitational pull exerted by the sun and the moon on the earth’s surface.

When the water on the surface of the ocean rises and falls alternatively, they are called waves.

Swimmers float in Dead sea because the increased salt content makes it dense.

They contain salty water.

The average salinity of the oceans is 35 parts per thousand.

It is low tide when water falls to its lowest level and recedes from the shore.

It got submerged.

Ice-caps, ground water, atmosphere moisture, Rivers are the sources of fresh water.

When the water vapour cools down, it condenses and forms clouds. From there, it may fall on land or sea in the form of rain, snow or sleet.

Unlike the calm waters of ponds and lakes, ocean water keeps on moving continuously. It is never still. The movements that occur in the oceans can be broadly categorised as waves, tides and currents.

The ocean bodies and the seas contain salty water. The water of the ocean is salty or saline as it contains large amount of dissolved salts.

When the water on the surface of the ocean rises and falls alternately, they are called waves. During a storm, the winds blowing at very high speed form huge waves. These may cause tremendous destruction.

March 22 is celebrated as World Water Day when the need to conserve water is reinforced in different ways.

During low tide water falls to its lowest level and recedes from the shore.

It is high tide when water covers much of the shore by rising to its highest level. It is low tide when water falls to its lowest level and recedes from the shore.

Salinity is the amount of salt in grams present in 1000 grams of water.

The water of the earth closer to the moon gets pulled under the influence of the moon’s gravitational force and causes high tide.

Caspian Sea is the largest of the world.

The major sources of fresh water are the rivers, ponds, springs and glaciers.

The salinity of Dead sea is 45 parts per thousand.

Indira Points lowest point of India until Tsunami 2004.

The first indication that tsunami is approaching is the rapid withdrawal of water from the coastal region, followed by destructive wave.

Our earth is like a terrarium. The same water that existed centuries ago still exists today. The water used to irrigate a field in Haryana may have flowed down the Amazon River a hundred years ago.

It is high tide when water covers much of the shore by rising to its highest level.

Salinity is the amount of salt grams present in 1000 grams of water.

The water of the oceans is salty or saline as it contains large amount of dissolved salts.

Salinity is the amount of salt in grams present in 1000 grams of water.

The movements of oceans are categorized as tides, currents and waves.

Salinity is the amount of salt in grams present in 1000 grams of water.

The major sources of fresh water are the rivers, ponds, springs and glaciers.

Tsunami is a Japanese word that means “Harbour waves” as the harbours get destroyed whenever there is tsunami.

During high tide waves rise high and water covers much of the shore.

The Labrador Ocean current is cold current while the Gulf Stream is a warm current.

During the full moon and new moon days, the sun, the moon and the earth are in the same line and the tides are highest. These tides are called spring tides.

Water is absolutely essential for survival. Water alone can quench our thirst when we are thirsty.

World Water Day observed on 22 March every year.

The dead Sea is located is Israel.

Caspian Sea.

Tsunami is a series of huge tidal waves caused by earthquakes or other disturbance under the sea.

Waves are formed winds scrape across the ocean surface. The stronger the wind blows, the bigger wave becomes.

74% of earth’s surface is water.

He major sources of fresh water in the are ponds, lake, glaciers and rivers.

The rise of sea level is called the flood tide and fall is called the ebb tide.

Spring tides and neap tides.

Swimmers can float in it because the increased salt content makes it dense.