Class 2 Exam > Class 2 Notes > Science for Class 2 > Chapter Notes: Water
Water Class 2 Notes EVS
We all need water. Plants as well as animals also need water to stay alive.
We need water for drinking, bathing, cooking, and gardening.
Sources of Water
Rain is the main source of water on the earth. The rainwater fills up the ponds, lakes, rivers and oceans. These are called the waterbodies. These waterbodies give us surface water.
Some of this water also seeps deep into the ground. This is called groundwater. We get the groundwater by digging a well, handpump or a tube well.
A well
A tube well
The water that we get directly from these sources is not clean. It has impurities like dirt, sand and germs. This water is first purified and then used. In towns and cities, it is supplied into our homes through taps.
A tap
Clean Drinking Water
The water that reaches our home looks clean. However, it still needs to be made safe for drinking. This can be done either by boiling the water or by filtering it. Boiling kills the germs present in the water. It can also be purified using water filters and water purifiers. Clean drinking water is called potable water. This water is tasteless, colourless, odourless and germ free.
If we drink unclean water, we may suffer from diseases like jaundice, cholera and typhoid.
Storing Water
At home, we store water in containers like the pot, bucket, tub and overhead tank.
Do you know
- Our body is actually about 65% water.
- Water stored in dams across the rivers is used to produce electricity.
- The Egyptians were the first people to record methods for treating water.
Save Water
The water available for our use is limited. So, we should not waste water. Given below are some tips to save water.
Another good way to save water is through rainwater harvesting. Rainwater is collected in big tanks with the help of pipes. It is then filtered, purified and stored. This water can then be used when needed. Nowadays, many houses, schools and factories store water in this way.
Do you know
In Bikaner, Phalodi and Barmer of Rajasthan, almost all the houses traditionally had underground tanks or tankas for storing drinking water.
The document Water Class 2 Notes EVS is a part of the Class 2 Course Science for Class 2.
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FAQs on Water Class 2 Notes EVS
| 1. What are the main sources of water pollution? |  |
Ans. The main sources of water pollution include industrial waste, agricultural runoff, sewage and wastewater discharge, and improper disposal of household chemicals and trash.
| 2. How does water pollution affect human health? | |
Ans. Water pollution can have severe impacts on human health. Contaminated water can lead to the spread of waterborne diseases such as cholera, typhoid, and dysentery. It can also contain harmful chemicals that can cause long-term health problems like cancer and organ damage.
| 3. What are the consequences of water scarcity? | |
Ans. Water scarcity can have various consequences. It can lead to inadequate sanitation and hygiene practices, increasing the risk of waterborne diseases. It can also result in food shortages as agriculture heavily relies on water. Additionally, water scarcity can lead to conflicts and social unrest in regions where water resources are limited.
| 4. How can individuals contribute to water conservation? | |
Ans. Individuals can contribute to water conservation by practicing simple habits such as turning off taps when not in use, fixing leaky faucets and pipes, using water-efficient appliances, and collecting rainwater for household use. Additionally, reducing water-intensive activities like excessive lawn watering and taking shorter showers can also help conserve water.
| 5. What are some methods of water purification? | |
Ans. There are several methods of water purification. Some common methods include filtration, where water passes through a physical barrier to remove impurities, and disinfection, where microorganisms are killed using chemicals or ultraviolet light. Other methods include distillation, reverse osmosis, and the use of activated carbon to remove contaminants.
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