NCERT Solutions Class 7th Geography Social Science Chapter – 5 Water Notes

May 11, 2022

Notes Solutions Class 7th Geography Social Science Chapter – 5 Water

Textbook	NCERT
Class	7^th
Subject	(Geography)Social Science
Chapter	Chapter – 5
Chapter Name	Water
Category	Class 7th Social Science Geography
Medium	English
Source	Last Doubt

NCERT Solutions Class 7th Geography Social Science Chapter – 5 Water Notes What is a simple definition of water? What are the 7 main properties of water? Why is it called water?What is water in answer? is the full form of water? What are 10 uses of water? Why water is important? What is the importance of water? Why is water important 10 points? Where is water found? What is the story of water? Who named water? Is water the mother of life? Who is the first water in the world?Who discovered water? Who is the first water man of India? Who purified water first? What is the oldest method of water? How is water purified in India? What did early humans drink? Does water have a Colour?What is main source of water?

NCERT Solutions Class 7th Geography Social Science Chapter – 5 Water

Chapter – 5

Water

Notes

Water Cycle

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

The major sources of freshwater are the rivers, ponds, springs and glaciers. The ocean bodies and the seas contain salty water. Most of the salt is sodium chloride or the common table salt that we eat.

Distribution of Water Bodies

Three-fourth of the earth’s surface is covered by water. Water is absolutely essential for survival. Water alone can quench our thirst when we are thirsty.

Ocean Circulation

The movements that occur in oceans can be broadly categorised as waves, tides and currents.

Tides

The rhythmic rise and fall of ocean water twice in a day is called a tide. It is high tide when water covers much of the shore by rising to its highest level. It is low tide when waterfalls to its lowest level and recedes from the shore.

The strong gravitational pull exerted by the sun and the moon on the earth’s surface cause the tides. 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.

But when the moon is in its first and last quarter, the ocean waters get drawn in diagonally opposite directions by the gravitational pull of sun and moon resulting in low tides. These tides are called neap tides.

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. The warm ocean currents originate near the equator and move towards the poles. The cold currents carry water from polar or higher latitudes to tropical or lower latitudes.

Warm currents bring about warm temperature over land surface. The areas where the warm and cold currents meet provide the best fishing grounds of the world. Seas around Japan and the eastern coast of North America are such examples. The areas where a warm and cold current meets experience foggy weather making it difficult for navigation.