Telangana SCERT Solution Class VII (7) Social Studies Chapter 3 Tanks and Ground Water.
(1) Correct the incorrect sentence
(a) The water flows from the plateaus to the plains.
(b) There is a thick deposit of alluvial soil in the plains.
(c) Ground water will eventually dry up.
(d) It is difficult to dig well in Rajahnundry.
(2) The wells shown in this figure are situated on the slopes of the Godvari. But there seems to be mistake in the figure. Can you correct it?
Ans: – The mistake is level of water.
(3) In which of the places do you except maximum percolation to take places?
Ans: – I think its third picture.
(4) When the owners of some wells in Pallerla started using high-powered motors to draw water from the wells, the owners of other wells noticed that their wells were drying up. Discuss the possible solution to the problem.
Ans: – We know that high speed motors and wells are being used arbitrarily in various places off present days then he needs in daily life the water level in not the same everywhere. In this way, the water level is gradually drying up due to unnecessary wastage of water. As a result our next generation will face more crises we all need to be aware them will these water levels get rid of drying out.
(5) In areas where there is a shortage of ground water, should there be any restrictions on digging bore wells? Why?
Ans: – Yes, There should restrictions on digging bore wells where there is shortage of water. Because the next generation will get the value of fur immoral irrationality. Due to indiscriminate use of water at present there will be no water to drink later. More over it is level is drying p. This will prevent damage to natures.
(6) Think about the ways to restore the ground water in your areas.
Ans: – The ways to restore the ground water in my area are –
(i) The first is to stop the arbitrary wastage of water.
(ii) Trees should be planted in the land to maintain the moisture of the soil.
(iii) Grasses help keep the soil moist
(iv) Wells should not be dug here n there
(v) Where the water level is low excavation should not be done.
(vi) Excess water required should not be given to cultivated land.
(vii) The water used by humans can be used for farming.
(viii) After retaining rainwater on the root of the house, it can be used for farming.
(9) Read the third paragraph under quality of ground water in page no 30 and comment on it.
Ans: – Now a day’s various harmful chemicals are used in factories for cultivation. Then we can see the harmful effects of all those chemicals on soil and water.
Extra Questions and Answers:
Q.1. Answer the following questions.
1.) What is the other name of tank ?
Answer:- The another name of tank is Cheruvulu.
2.) How were the tanks built?
Answer:- The tanks were usually built by building a strong wall of stones and mud across a small stream in such a way that with a wall on just one side, a large lake could be formed.
3.) How did the tanks help ?
Answer:- Tanks helped the people not only by giving them and their animals drinking water, but also in irrigating their fields in such a way that even during drought years, they could raise at least some crops.
4.) Write about Mission Kakatiya.
Answer:- After the formation of the new state, the government of Telangana has started a programme for minor irrigation tanks in the state. This programme, called ‘MissionKakatiya, manaurumanacheruvu”, aims at removal of silt from tank beds and repair and construction of tank bunds on about 47000 tanks.
5.) What are traditional fishing communities?
Answer:- Traditional fishingcommunities like Besta (Gangaputra),Goondla and Mudiraj (Tenugu) community depend upon these tanks and rivers for leading their lives.
6.) What types of fishes were available in rivers and canals ?
Answer:- Different kinds of fishes likeBuddaparakalu, Kodipelu,Chandamamalu, Kuntumukkulu, Pulishalu,Isuka dondulu, paperalu, Gandraparakalu,Guriyopillalu, Koraminulu, Valugalu etc, were easily available in the streams, small rivers and canals.
7.) Which fishes are available in market nowadays?
Answer:- The important among these areMerige, Ravvu, Bochche (Katla) andBangaru Theega.These fishes are mainly available in the market nowadays.
8.) What two methods does fisherfolk uses?
Answer:- Fisherfolk use two methods to catch fish one in shallow waters and one in deep Waters. Visire vala is used when there is less water in the tank. Kachchu vala weighs less.
9.) What the fisherman does after fishing?
Answer:- When the catch is small they take them to Kodad or Suryapet for selling and when it is large they take it to cities like Hyderabad. Usually it is the men who do the fishing and it is the women who do the selling in the market.
10.) Define previous rocks .
Answer:- Rocks which have cracks or pores (minute holes) in them and can contain water are called pervious rocks.
11.) Define aquifier.
Answer:- The layer of water which accumulates under the ground among rocks is called Aquifer.
12.) Grass are planted on hill slopes. Give reason.
Answer:- Grass are plantedon the hill slopes because from where a stream starts and small check dams are also built across streams to store water for a longer time.
13.) Why sometimes the groundwater is salty or sweet, explain.
Answer:- The groundwater is sometimes salty or sweet because of the minerals which are dissolved in the groundwater. These minerals come from the rocks and soils underneath. Hence,depending upon the minerals which mix with the water, the taste and nature of water changes.
14.) Explain how excess minerals in water affects humans?
Answer:- Drinking such water is not good for our health and can cause diseases, which affect our bones, teeth etc.
Q.2. Fill in the blanks.
1.) Groundwater is usually mixed with many minerals.
2.) The areas adjacent to the great rivers likeKrishna and Godavari have deep layers ofSand and silt.
3.) The thickness of the aquifer determines the availability of groundwater in the area.
4.) There are 339 members in cooperative society of fishermen.
5.) The membership is decided on the basis of the Ayakat.
6.) Bhethavolugot its name from Bhethala Reddy.
7.) Tank bed could be used for raising some crops.
Q.3. Choose the correct answer.
1.) The most important thing is that tanks helped to prevent ________ and ___________.
a.) Run-off rainwater
b.) Soil erosion
c.) Both a and b
d.) None of these
Answer:- c. Both a and b
2.) Bhethavolu Village is _______ km from Kodada.
a.) 13
b.) 14
c.) 15
d.) 16
Answer:- d. 16
3.) Kannalu is _________ net.
a.) Largest
b.) Smaller
c.) Thicker
d.) None of these
Answer:- c. Thicker
4.) Doddu vala is used to catch the fish of Weight ______grams to ____ kilos.
a.) 300 gm to 3 kg
b.) 400 gm to 4 kg
c.) 500 gm to 5 kg
d.) 100 gm to 5 kg
Answer:- d. 100 gm to 5 kg
5.) Fishing is done ________ a day.
a.) Once
b.) Twice
c.) Thrice
d.) Anytime
Answer:- b. Twice
6.) Water contains mineral like ______.
a.) Sodium
b.) Fluoride
c.) Chloride
d.) All of the above
Answer:- d. All of the above
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