Question 1:
Who made the Ghadsisar ? How big it is ? Describe.
Answer:
King Ghadsi of Jaisalmer made it 650 years ago with the help of the people. All around there are Ghats with steps leading to the water, decorated verandahs, large halls, rooms and much more. Rain water collected in it spread over many miles. It was made in such a way that when the lake was full, the extra water flowed into another lake at a lower level. When that too was filled up, The extra water flowed into the third lake and so on filling nine such interconnected lakes. The collected rain water could be used throughout the year and there was no shortage of water.
Question 2:
Who was Al-Biruni ? What has wrote about ponds of India
Answer:
Al-Biruni was traveller who came to India from Uzbekistan thousand years ago. He wrote about the ponds at that time. The people here are very skilled in making ponds my countrymen would be surprised to see them. They pile up high rodes and join them with iron rods to build chabutaras all around the lake. Between these, there are rows of long stair cases for going up and down. The steps for going up and coming down are separate, so there is less crowdling.
Question 3:
How is the area around your school ? Where the rain water around it goes ?
Answer:
Area around our school’s cemented Here drains and roads are cemented and rain water goes to earth drains, pipes and diletres.
Question 4:
Why there is great shortage of water in Jaisalmer of Rajasthan and other areas ?
Answer:
Besides Jaisalmer, many area in Rajasthan get very little rainfall. Here, it rains for only ten to twelve days in the entire year. The rivers, here donot have water in them all round the year. Therefore, there is shortage of water.
Question 5:
How the people of villages in Rajasthan collect the water ?
Answer:
Here people has made lakes and Johadi to collects water. Some water from the lakes is soaked by the ground and reaches the wells and bavadis in that area. The soil of the area also became wet and fertile.
Question 6:
How people collect rain water in houses ?
Answer:
Every house has a system to collect the rain water. Rain water that falls on the roof reaches the under ground tank. This water can be used when needed.
Question 7:
Are there any custom related to water ?
Answer:
Yes, there are many customs, festivals and celebration related to water. At some places whenever lake get filled with rain water. The people gather around the lake to celebrate. In the cities one can see this custom. The new bride worships the tap in her house.
Question 8:
Now a days how people make arrangement of water by different ways.
Answer:
1. By water tanker
2. Tap
3. Installing pump on the tap water pipeline.
4. Wells
5. By installing water motor
6. By hand pump
7. Taking water from canal.
Question 9:
Why tulu pump is put on the Jal board pipeline ?
Answer:
When there is no water or less water in Jal board pipeline then people put Tulu pump to get more water.
Question 10:
How Tarun Bharat Sangh helped to solve the water problem of Darki mai’s village ?
Answer:
Darki mai’s women who lives in a village of Alwar district of Rajasthan. She made a lake in the village with the help of Tarun Bharat Sangh. The problem of food and water for animals was solved people get more milk. They have started earning more.
Question 11:
What function the Tarun Bharat Sangh performs ?
Answer:
It rebuild the old lakes and Jahadi, it also build new ones..
Question 12:
Make two posters relating water.
Answer:
1. Water on earth is for one for all “Think of some other”.
2. “Save water for your children, not the money.”
Question 13:
What information do you get from the water bill of your house ?
Answer:
We get the following information from the water bill of our house :
1. What is the period of the water bill ?
2. How much money is to paid on the bill.
3. Sometimes repair and miscellaneous charges are also added in the bill.
Question 14:
When does an object floats on water ?
Answer:
The object which can displace the volume of water which has more weight than the weight of the body, floats on the surface of water otherwise it sinks.
Question 15:
An iron needle sinks while a heavy ship floats. Why ?
Answer:
Because ship displaces more water than its own weight while a needle cannot displace more water than its own weight. Therefore, ship floats while a needle sinks down
Question 16:
An egg sinks when put into the water. But when a spoon of salt is added then it floats. Why ?
Answer:
When salt is added to the water then it becomes concentrated, due to which its density increases. So, the weight of the water displaced by egg has now more weight than that of the egg. So, the egg floats now.
Question 17:
Why is it easy to swim in dead sea ?
Answer:
It is very easy to swim in dead sea, because dead sea has large quantity of salt dissolved in it, due to which its density is quite more, due to which it is easy to swim in it.
Question 18:
What do you mean by density ?
Answer:
Density. The mass per unit volume of a substance is called its density.
Question 19:
Name two soluble and insoluble substances.
Answer:
Soluble substances. Sugar and salt. Insoluble substances. Chalk powder and raw wood.
Question 20:
Does water solve in water ?
Answer:
No water does not solve in water.
Question 21:
What is evaporation ?
Answer:
A liquid evaporates on heating. The process of changing water vapours is called evaporation.
Question 22:
When a wet cloth is spread in sunlight, how does it dries up ?
Answer:
When cloth is put in sunlight, the water in it evaporates, due to which the cloth dries up.
Question 23:
How Tarun Bharat Sangh helped to solve the water problem of Darki mai’s village ?
Answer:
Darki mai’s women who lives in a village of Alwar district of Rajasthan. She made a lake in the village with the help of Tarun Bharat Sangh. The problem of food and water for animals was solved people get more milk. They have started earning more.
Question 24:
What are the conditions of evaporation ?
Answer:
1. High temperature
2. Blowing air
3. More surface area.
Question 25:
Describe the Dandi March incident.
Answer:
In 1930, before independence Gandhiji did the Dandi March to break the salt law. Salt can be made easily from sea water. But Indians were not allowed to make the salt, people had to purchase costlier salt from the market. People had to pay tax for the same. Gandhiji with other people went on a Yatra from Ahmedabad to the Dandi sea shore in Gujarat to protest against the salt law. British Govt. imprisoned Gandhi Ji.
Question 26:
How is salt made ?
Answer:
Sea water is filled in small pits on the ground. The water dries up in the strong sunlight and heaps of salt are left behind.