natural resourse-water std v std

8/13/2019 Natural Resourse-water Std v Std

1/11

SOCIAL STUDIESPROJECT

Natural Resource

.


2/11

TOPIC-WATER


3/11

Introduction

Water is a chemical compound and may found in a liquid form or in a solidform or in a gaseous form. All this three forms of water are extremelyuseful to human beings and other living things. No life can exist withoutwater.

Water is a natural resource. Water required for our needs must be goodand it should not contain unwanted impurities or harmful bacteria in it.Water should be wholesome safe to the people for drinking, cooking,bathing, washing etc.

Water is also used for maintaining better sanitation, beautification ofsurrounding, irrigation, fire fighting, generation of electricity etc.


4/11


5/11


6/11

Uses of water

Try to imagine life without water.

It is impossible.

Water is used for drinking, bathing, washing etc.

Without water can we do this thing. No.

Water is a natural resource which we have to use it in a manner.

Not only human beings need water, plants also need water for dispersal, tomake their seed soft and for normal growth.

As we can see in the previous slides animals also need water.

Animals which live in the water are called aquatic animal.


7/11

Sources of water

The various sources of water are available on the earth are-

Surface sources such as ponds and lakes, rivers, ocean and storage fromdam i.e reservoirs.

Underground sources such as springs, wells, tube-wells etc.


8/11

WATER IS USED TO GENERATEELECTRICITY.

A Dam is used a barrier that blocks flowing water or sends it in a new direction.People and animals build dams to control rivers and to create ponds and lakes. Abeavers dam work in much the same way as the giant dams that people build.

People throughout the world have built dams since ancient times. Early Egyptiansbuilt a dam almost 5,000 years ago. The Chinese built stone structures to block rivers

as early as 240 BC. Two dams in Spain that were built ancient Romans are still in usetoday.

People build dams to keep rivers from flooding and to save water. During heavy rainsa rivers water may rise too high. Without a dam to contain it, the extra water iswasted as it flows away unused.

With a dam in place , a deep reservoir, or pool, of water builds up behind the dam.This extra water can be put to many good uses. It might be used as a lake for

boating or swimming, for drinking water, for farm irrigation, or in manufacturing. The force created by water rushing through pipes in a dam is also useful. The flowing

water makes wheels called turbines spin. The turbines run machines calledgenerators, which produce electricity. This type of power is known as hydroelectricpower.


9/11

EARTHQUAKE IN WATER- TSUNAMI. Natural Disasters, both on land and under the ocean, may cause deadly

ocean waves called tsunamis. By the time a tsunami reaches shore it hasgained tremendous size and power. Tsunami can wipe out entire coastalvillage or towns.

Earthquakes, landslides or volcanic eruptions can trigger waves in a nearbyocean . These waves may travel for thousands of miles. They may move asfast as 500 miles [ 800 Kilometers ] an hour. As they approach a coastline,

the waves move more slowly. They also rise often to heights as great as100 meters [30 meters ]. As the first huge wave nears land, the coastalwater often draws back dramatically. Then the tsunami hits the land.Tsunami can destroy trees, buildings and even whole beach.

Tsunamis cannot be stopped, but there are ways to defend against them.Scientists around the world watch for early signs of earthquakes . They alsonote unusual changes in ocean levels. With this information, Scientists canwarn people to leave areas that a tsunami might hit .

The Pacific Ocean is the site of many tsunamis, but tsunamis can form inthe Atlantic and Indian Ocean, too. A Powerful earthquake struck beneaththe Indian Ocean in December 2004. The earthquake set off tsunamis that

hit about 10 countries. More than 2,00,000 people died. This was the worsttsunami ever recorded.


10/11

Flood

When water overflows onto dry land, a flood takes place. Floods havealways been a part of life on earth. Almost every culture has a legend abouta great flood . From the time of the earliest civilizations people have builttheir cities along rivers because humans rely on the rivers as sources of

water to drink and to grow their crops. River floods therefore affect manypeople. In some places have built dams or levees [ types of barriers ] toprotect lands from flooding.

Floods can be dangerous and destructive each year. Some years are farworse. In 1993 the Great Flood in the mid-west alone caused more than12 billion dollars in damage and killed 48 people. Floods are a part of

nearly 90 percent of all natural disasters in the United States.

Floods are not always bad. In many places flood bring rich soil and neededwater to farmland. People in ancient Egypt depended on the flooding of theNile River every year to help them grow their crops.


11/11

natural resourse-water std v std

Documents