Class 9 Science - Chapter Why Do We Fall ill NCERT Solutions | What precautions can you take in your sc
What precautions can you take in your school to reduce the incidence of infectious diseases?
Precautions to reduce incidence of infectious diseases are:
(i) Drinking clean and hygienic water.
(ii) Keeping the toilet neat and clean.
(iii) Stay away from the diseased person.
(iv) Using handkerchief to cover the mouth while sneezing or coughing.
(v) Initiations of the school immunization program for children.
(vi) Preventing over crowded classes.
More Questions From Class 9 Science - Chapter Why Do We Fall ill
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Why are we normally advised to take bland and nourishing food when we are sick?
- Q:-
A baby is not able to tell her/his caretakers that she/he is sick. What would help us to find out
(a) that the baby is sick?
(b) what is the sickness? - Q:-
State any two conditions essential for being free of disease.
- Q:-
Under which of the following conditions are you most likely to fall sick?
(a) when you are taking examinations.
(b) when you have travelled by bus and train for two days.
(c) when your friend is suffering from measles.Why?
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In which of the following case do you think the long-term effects on your health are likely to be most unpleasant?
• if you get jaundice,
• if you get lice,
• if you get acne.Why?
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What are the different means by which infectious diseases are spread?
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Conduct a survey in your neighbourhood to find out what the three most common diseases are. Suggest three steps that could be taken by your local authorities to bring down the incidence of these diseases.
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What are the immunisation programmes available at the nearest health centre in your locality? Which of these diseases are the major health problems in your area?
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List any three reasons why you would think that you are sick and ought to see a doctor. If only one of these symptoms were present, would you still go to the doctor? Why or why not?
- Q:-
Are the answers to the above questions necessarily the same or different? Why?
Popular Questions of Class 9 Science
- Q:-
Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?
- Q:-
State the universal law of gravitation.
- Q:-
Which of the following are matter?
Chair, air, love, smell, hate, almonds, thought, cold, cold-drink, smell of perfume.
- Q:-
A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (Fig. 11.3). Let us take it that the force acts on the object through the displacement. What is the work done in this case?
- Q:-
What is meant by a pure substance?
- Q:-
How does the sound produced by a vibrating object in a medium reach your ear?
- Q:-
In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium observations are in agreement with the law of conservation of mass.
sodium carbonate + ethanoic acid → sodium ethanoate + carbon dioxide + water
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What are canal rays?
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How is our atmosphere different from the atmospheres on Venus and Mars?
- Q:-
Who discovered cells, and how?
Recently Viewed Questions of Class 9 Science
- Q:-
Why should preventive measures and biological control methods be preferred for protecting crops?
- Q:-
Which separation techniques will you apply for the separation of the following?
(a) Sodium chloride from its solution in water.
(b) Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.
(c) Small pieces of metal in the engine oil of a car.
(d) Different pigments from an extract of flower petals.
(e) Butter from curd.
(f) Oil from water.
(g) Tea leaves from tea.
(h) Iron pins from sand.
(i) Wheat grains from husk.
(j) Fine mud particles suspended in water. - Q:-
Abdul, while driving to school, computes the average speed for his trip to be 20 km h-1. On his return trip along the same route, there is less traffic and the average speed is 40 km h-1. What is the average speed for Abdul’s trip?
- Q:-
Name the technique to separate
(i) butter from curd,
(ii) salt from sea-water,
(iii) camphor from salt. - Q:-
The mass per unit volume of a substance is called density. (density = mass/volume). Arrange the following in order of increasing density – air, exhaust from chimneys, honey, water, chalk, cotton and iron.
- Q:-
Will advanced organisms be the same as complex organisms? Why?
- Q:-
Draw a sketch of Bohr’s model of an atom with three shells.
- Q:-
Fill in the gaps in the following table illustrating differences between prokaryotic and eukaryotic cells.
Prokaryotic Cell Eukaryotic Cell 1. Size : generally small (1-10 μm)
1 μm = 10-6 m1. Size generally large (5-100 μm) 2. Nuclear region: ________________
and known as _________________2. Nuclear region: well defined
andsurrounded by a nuclear
membrane3. Chromosome: single
3. More than one chromosome 4. Membrane-bound cell organelles absent 4. _______________________
_______________________ - Q:-
Which of the following will show “Tyndall effect”?
(a) Salt solution
(b) Milk
(c) Copper sulphate solution
(d) Starch solution. - Q:-
State which of the following situations are possible and give an example for each of these:
(a) an object with a constant acceleration but with zero velocity
(b) an object moving in a certain direction with an acceleration in the perpendicular direction.
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