The ocean bodies and the seas contain (a)   water.

The average salinity of the oceans is (a)   parts per thousand.

(a)   salt is mostly dissolved in ocean and sea water.

(a)   are formed when winds scrape across the ocean surface.

Which is the largest lake in the world?

(a)  

What is a terrarium?

Ans. It is an artificial enclosure for keeping (a)  

What is meant by the term salinity?

Ans. Salinity is the amount of salt in grams present in (a)   .

What is the salinity of Dead Sea?

Ans. Dead Sea in Israel has salinity of (a)   .

How is it possible to float in the Dead Sea?

Ans. Swimmers can float in it because the increased salt content makes it (a)   .

Why is the ocean salty?

Ans. The water of the oceans is salty or saline as it contains large amount of (a)   .

What is the effect of high tide?

Ans. It is high tide when water covers much of the shore by rising to its (a)   .

What is the effect of low tide?

Ans. It is low tide when water falls to its (a)   and recedes from the shore.

What are the major sources of freshwater?

Ans. The major sources of fresh water are the (a)   .

When is world water day celebrated?

Ans. (a)   is celebrated as World Water Day when the need to conserve water is reinforced in different ways.

What is the first indication of a tsunami?

Ans. The first indication that tsunami is approaching is the rapid withdrawal of water from the coastal region, followed by (a)   .

Why is water essential for our survival?

Ans. Water is absolutely essential for (a)   . Water alone can quench our thirst when we are thirsty.

What happened to the Indira point during the tsunami of 2004?

Ans. The Indira point in the (a)   islands got submerged after the tsunami.

Name one warm ocean current and one cold ocean current?

Ans. The (a)   current is cold current while the Gulf Stream is a warm current.

What is Tsunami?

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

What are ocean currents?

Ans. Ocean currents are streams of water flowing constantly on the ocean surface in (a)   directions.

Where does the word tsunami come from and what does it mean?

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