Check latest NCERT solutions for Class 5 EVS Chapter 8 - A Treat for Mosquitoes. You will find here the detailed solutions for all the questions given at each page of NCERT Class 5 EVS Chapter 8. All these latest solutions will help you clear all your doubts.
NCERT Solutions for Class 5 EVS
Chapter 8: A Treat for Mosquitoes
NCERT Page No. 68
(i) Do you know anyone who has had malaria?
(ii) How did they find out that they had malaria?
(iii) What problems did they have on having malaria?
(iv) What other diseases can be caused by mosquito bites?
(v) In which season is malaria more common? Why do you think this happens?
(vi) What do you do in your house to protect yourself from mosquitoes? Also find out from your friends about what they do?
Look at the report of the blood test given here. Which words in the report help us to know that the person has malaria?
(i) Yes, one of my friends once suffered from malaria.
(ii) My friend suffered from high fever with chills. He also had body ache and vomiting. Then after his medical check-up he was diagnosed with malaria.
(iii) When he was suffering from malaria, he faced problemslike fever, body ache, vomiting and weakness.
(iv) Diseases such as dengue, chikungunya and yellow fever can be caused by mosquito bites.
(v) Malaria is more common in rainy seasons.This is because more of the mosquitoes breed in water logged and damp places in rainy season.
(vi) We adopt the following measures to protect ourselves from mosquitoes in our house:(i) We keep our surroundings neat and clean.(ii) We don’t allow water to get collected for long time in our surroundings.(iii) We usually spray a layer of kerosene over open ditches and pools.
(iv) We use mosquito repellents and mosquito nets to protect ourselves from mosquitoes.We also keep our coolers, pots clean by changing their water regularly.
(v) The words “Malarial Parasite Found in Blood Sample” help us to know that the person has malaria.
NCERT Page No. 70
(i) Look at Aarti’s blood report and find out the minimum required haemoglobin?
(ii) How much did Aarti’s haemoglobin go up and how long did it take for that?
(iii) What does the newspaper report say about the problems caused by anaemia?
(iv) Have you or anyone in your family ever needed to get a blood test? When and why?
(v) What was found out by the blood test?
(vi) Have you had a health check up in your school? What did the doctor tell you?
(i) The minimum required haemoglobin is 12 gm/dl.
(ii) Aarti’s haemoglobin went up by 2.5 gm/dl and it took 2 months and 25 days to rise it up.
(iv) The newspaper report says that anaemia affects both the physical and mental health of affected children. They do not grow well and their energy levels are also low. Anaemia also affects their ability to study properly.
(v) Yes, last year I had to get my blood tested I was suffering from severe fever.
(vi) The blood test reports said that I was suffering from malaria.
(vii) Yes, I had a health check-up in my school last months. The doctor said that I was fit and healthy.
NCERT Page No. 71
Ask a doctor or elders about the food items which contain iron.
Some of the main food items which contain iron are: spinach, beans, cabbage, lettuce, pomegranate, apple, etc.
NCERT Page No. 72
Find Out and Tell
(i) Have you seen any poster like this put up anywhere?
(ii) Who do you think put up such posters, or give ads in the newspapers?
(iii) What are some of the important points given in the poster?
(iv) Why do you think pictures of a tank, cooler and pits are shown in the poster?
(i) Yes, I have seen such posters on the boundary walls of a dispensary in our locality.
(ii) The government put such posters and give ads in the newspapers to spread awareness among people about various general problems arising in the society and steps to control them.
(iii) Some of the important points that are given in the poster are:
- Names of diseases spread by mosquitoes
- Measures to be taken to prevent growth of mosquitoes in our surroundings
- Ways to protect ourselves from mosquito bites.
(iv) Tank, cooler and pits are the places where water can stagnate and would become the favourable sites for mosquito breeding and multiplication.
(i) Why do you think it talks about putting fish in the tank? What do you think the fish eats?
(ii) What will happen when oil is spread on the water?
(i) It talks about putting fish in the tank because the fish eats larvae of mosquito developing in water.
(ii) When oil is spread on water, its thin layer on water surface prevents oxygen supply to eggs and larvae of mosquitoes due to which they are killed.
NCERT Page No. 73
Which diseases are spread by flies and how?
Diseases spread by flies are dysentery, cholera, typhoid, anthrax, etc. These diseases are spread when the disease causing germs are carried by the flies. Actually, when a fly sits on contaminated or dirty material, harmful germs stick to its legs. When the same fly sits on food or other eatables, the germs get transferred to that food. When we eat that contaminated food, germs enter our body and cause the disease.
Divide your class into two or three groups. Each group will go around to check one area in school or around it. It must carefully note if water has collected anywhere, and mark (√) where it finds stagnant water.
(i) Since how many days has water collected there?
(ii) Has it caused any problem in the area?
(iii) Who is responsible for keeping these places clean?
(iv) Who is supposed to get the gutters and drains repaired?
(v) Can any larvae be seen in the collected water?
Pot – √
Cooler – √
Tank – √
Any open space in school ground – No
Gutter – √
Any other place – √ (near drains)
(i) The water seems to have been collected there for more than a week.
(ii) Yes, due to this stagnant water the whole area is stinking and has become a breeding place of mosquitoes and germs.
(iii) It is the responsibility of school authorities to maintain cleanliness within the school premises whereas in other places in the area its Municipal Corporation or village panchayatwho is responsible for keeping the places clean.
(iv) The Municipal corporation or the village panchayat is responsible for getting the gutters and drains repaired.
(v) Yes, some developed larvae can be seen in the collected water.
Make a Poster
(i) In your group, make a poster with a message to keep the cooler, tank, drains and the area clean (wherever water collects). Put up your poster in and around your school.
(ii) Find out who is responsible for keeping the area around your school clean. Write a letter from your class, reporting your findings and suggestions. Find out to whom the letter should be written and to which office it should be sent.
(i) Students can make a poster with their own imagination on giving an message to keep cooler, tank, drains, etc., clean and prevent mosquito breeding.
(ii)The municipality of my town is responsible for keeping the area around my school clean.
The letter should be written to the mayor and be sent to the local municipal corporation office.
Letter to the Mayor
Municipal Corporation of Delhi
Subject: Request for cleanliness and maintenance of area around BalBharati Public School Rohini, Sector-25
Through this letterI want to draw your attention towards the unhealthy situation of the area around my school. There are heaps of garbage lying around the school. Pits and drains are stinking with stagnant water. The entire area has been turned into a mess and has become a favourite spot for mosquitos and germs. If no measures will be taken to improve the condition of this area, then it is sure to cause spreading of dangerous diseases in the area.
So, I requestyou to look into the matter immediately and order to clean up the garbage and drains in the area as soon as possible.
For this I shall ever be very grateful to you.
Class V, BalBharati Public School Rohini, Sector-25
NCERT Page No. 74
Is there a pond or river around your house or school? Go and look around and observe these things:
(i) Can you see algae in or around the water?
(ii) Where else have you seen algae?
(iii) Are there plants growing on the side or in water? Find out their names. Draw some of these in your note book.
(iv) Do you think these were planted by someone or did they grow on their own?
(v) What else can you see in water? Make a list.
(i) Yes, I can see algae in or around the water.
(ii) I have seen algae on the surface of ponds and pools, near the drains,handpumps, etc.
(iii) Yes, there are some small plants growing on the side or in the water. Names of few plants are: liver worts, mosses, etc.
(iv) All these plants grew on their own.
(v) We can also find small fishes, frogs, mosquito larvae and tiny insects floating in water.
NCERT Page No. 75
What We Have Learnt
(i) What can you do so that mosquitoes do not breed in your house, school and neighbourhood?
(ii) How can you find out if someone has malaria?
(i) We can prevent mosquitos to breed by:
- Not allowing water logging in the nearby areas
- Spraying DDT and kerosene oil in drains, pits, etc.
- Cleaning the coolers and water tanks regularly
(ii) A positive blood test to diagnose malaria will confirm that the person has malaria.
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