Class 7 Geography Chapter 5 Water Question Answer

Class 7 Geography Chapter 5 Water Question Answer

Class 7 Geography Chapter 5 Water Question Answer | Class 7 Geography NCERT Solution | for all the students of CBSE /ICSE /State Board Exam..

Answer the following questions.

Que- What is precipitation?

The term precipitation refers to all forms of liquid and solid water particles, which fall from the atmosphere and reach the Earth’s surface.  

 

Que- What is the water cycle?

The process by which water continually changes its form and circulates between oceans, atmosphere, and land is known as the water cycle

 

Que- What are the factors affecting the height of the waves?

Speed, duration, and distance of the wind over the water determine the height of the waves.

 

Que- Which factors affect the movement of ocean water?

Ocean water movement is affected by temperature, earthquakes or volcanic eruptions, and underwater landslides

 

Que- What are tides and how are they caused?

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.

 

Que- What are ocean currents?

Ocean currents are streams of water flowing constantly on the ocean surface in definite directions. The ocean currents may be warm or cold.

 

Give reasons.

 

Que- Ocean water is salty.

The water of the oceans is salty or saline as it contains a large amount of dissolved salts. Most of the salt is sodium chloride or the common table salt that you eat.

 

Tick the correct answer

 

The process by which water continually changes its form and circulates

between oceans, atmosphere, and land………….

  • Water cycle
  • Tides
  • Ocean currents

 

Generally, the warm ocean currents originate near

  • Poles
  • Equator
  • None of these

 

The rhythmic rise and fall of ocean water twice in a day is called

  • Tide
  • Ocean current
  • Wave

 

Match the following

Caspian Sea Largest lake
Tide Periodic rise and fall of water
Tsunami Strong seismic waves
Ocean currents Streams of water moving along definite paths
Water cycle

 

Water Class 7 Questions and Answers

 

Our earth is like a terrarium. The same water that existed centuries ago still exists today. 

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

Salinity is the amount of salt in grams present in 1000 grams of water. The average salinity of the oceans is 35 parts per thousand. 

The dead sea in Israel has a salinity of 340 grams per liter of water. 

March 22 is celebrated as World Water Day. 

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

The largest tsunami ever measured was 150m. high. These waves travel at a speed of more than 700 km. per hour. The tsunami of 2004 caused widespread damage in the coastal areas of India. 

The Indira Point in the Andaman and Nicobar Islands got submerged after the tsunami. 

At high tide, the water covers much of the shore by rising to its highest point. Low tide occurs when the water drops to its lowest level and recedes from the shore. 

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. 

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

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