A Treat for Mosquitoes - 2 Class 5 Worksheet EVS Chapter 8

Q1: Fill in the blanks. 

(i) The _____________ has to be tested to find out the patient has malaria or not.
(ii) Blood is observed under the _____________.
(iii) Lack of haemoglobin in blood causes _____________.
(iv) The young ones of mosquitoes (baby mosquitoes) called __________.
(v) _____________ spread many diseases especially stomach problems. f) Mosquitoes lay eggs in __________ water
(vi) ___________________ spread Malaria.
Ans:
(i) Blood
(ii) Microscope
(iii) Anaemia
(iv) Larvae
(v) Flies
(vi) Stagnant

Q2: Tick (✔) the correct answer.

(i) What does a mosquito do when it bites us?
(a) It pinches us
(b) It bites off a piece of flesh
(c) It tickles us
(d) It sucks blood from our body
Ans: (d)

(ii) What is the symptom that shows that a person has malaria? 
(a) Indigestion
(b) Shivering
(c) Stomach pain
(d) Vomitings
Ans: (b)

(iii) How do mosquitoes locate human beings to bite?
(a) They have sharp eyes 
(b) They locate human beings through heat 
(c) They use sound to locate them 
(d) They use their sense of smell
Ans: (d)

(iv) In which season is Malaria more common?
(a) Rainy season 
(b) Winter 
(c) Summer 
(d) Spring
Ans: (a)

(v) Where will you look for mosquitoes’ eggs in water?
(a) At the bottom of the water
(b) In the middle layer of water
(c) At the top floating on it
(d) Everywhere in the water
Ans: (d)

Q3: Answer the following questions.

(i) What are the diseases that are spread by mosquitoes?
Ans: Diseases transmitted by mosquitoes include malaria, dengue, West Nile virus, chikungunya, yellow fever, filariasis, tularemia etc.

(ii) What measures have to be taken to protect ourselves from mosquitoes?
Ans: Wear long, light-coloured clothing when you go outdoors, especially at times when mosquitoes are active, Use mosquito repellent, Install proper mosquito nets on the doors and windows of your house, as well as on your tent and camping shelter.

(iii) What should we eat to increase haemoglobin or iron in the blood?
(or)
How can you prevent anaemia?
Ans: It is important to load up iron rich foods like green leafy vegetables, liver, tofu, spinach, eggs, whole grains, pulses and beans, meat, fish, dry fruits, et al. Folic acid is a B-complex vitamin that is required to make red blood cells in the body.

(iv) In which season is Malaria more common? Why?
Ans: Malaria is more widespread during the rainy season. During rains, mosquitoes have favourable breeding grounds, due to stagnant waters and puddles, as a result, mosquitoes increase in number and the harmful diseases they spread become more common.

(v) Why does the government advise people to put kerosene oil in the water coolers and on stagnant water during the rainy season?
Ans: It is advised to put kerosene oil in the water tanks of coolers during rainy seasons because kerosene oil prevents the breeding of mosquitoes that spread various diseases like malaria. It acts as a larvicidal, killing the larva of mosquitoes.

(vi) What are algae? Where and when are they commonly seen?
Ans: Algae are unicellular or multicellular organisms.They are green in colour. They make their food by the process of photosynthesis because chlorophyll.

(vii) What are the effects of anaemia on children?
Ans: Untreated anemia in children can have a serious effect on a child's growth. Anemia may affect mental development and function. This often leads to attention problems, delays in reading ability, poor school performance and in very rare cases - stroke

(viii) How can you check the growth of mosquitoes?
Ans: We can check the growth of mosquitoes around us by using the mosquito repellent like all out, good night and mosquito coil.

(ix) Some jumbled sentences are given below showing how the flies spread diseases. Arrange them in sequence by writing 1, 2, 3, 4, etc. in the boxes provided. ( )
1. They pick disease-causing agents (microbes) from there. ()
2. We consume such food. ()
3. Flies sit on the garbage and other waste products. ()
4. Microbes enter our bodies and cause diseases. ()
5. Then they sit on our food. ()
Study the reports given below carefully and answer the following questions.

Ans:
Order will be:
1. Flies sit on garbage and other waste products.
2. They pick disease causing agents (microbes) from there.
3. Then they sit on our food.
4. We consume such food.
5. Microbes enter our body and cause diseases.