Class 9 Science - Chapter Natural Resources NCERT Solutions | We know that many human activities lead
We know that many human activities lead to increasing levels of pollution of the air, water-bodies and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollution?
Yes. Isolating human activities to specific areas would help in reducing levels of pollution.
For example ;
(i) Having heavy industries outside the main city will control pollution to some extent.
(ii) The pollution caused by these industries will not contaminate water resources, agriculture land, fertile land, etc.
More Questions From Class 9 Science - Chapter Natural Resources
- Q:-
List any three human activities that you think would lead to air pollution.
- Q:-
What causes winds?
- Q:-
Why is the atmosphere essential for life?
- Q:-
Why do organisms need water?
- Q:-
Why is water essential for life?
- Q:-
List any three human activities which would lead to an increase in the carbon dioxide content of air.
- Q:-
How does the atmosphere act as a blanket?
- Q:-
How is our atmosphere different from the atmospheres on Venus and Mars?
- Q:-
You have seen weather reports on television and in newspapers. How do you think we are able to predict the weather?
- Q:-
What is the greenhouse effect?
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
- Q:-
What are canal rays?
- Q:-
State any two conditions essential for good health.
- Q:-
Who discovered cells, and how?
Recently Viewed Questions of Class 9 Science
- Q:-
How do poriferan animals differ from coelenterate animals?
- Q:-
Why are the ceilings of concert halls curved?
- Q:-
What is the mass of—
(a) 1 mole of nitrogen atoms?
(b) 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?
(c) 10 moles of sodium sulphite (Na2SO3)? - Q:-
How are pteridophytes different from the phanerogams?
- Q:-
A bus starting from rest moves with a uniform acceleration of 0.1 m s-2 for 2 minutes. Find (a) the speed acquired, (b) the distance travelled.
- Q:-
State any two conditions essential for being free of disease.
- Q:-
An electric heater is rated 1500 W. How much energy does it use in 10 hours?
- Q:-
The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?
- Q:-
Calculate the molecular masses of H2, O2, Cl2, CO2, CH4, C2H6, C2H4, NH3, CH3OH.
- Q:-
Which wave property determines
(a) loudness, (b) pitch?
- All Chapters Of Class 9 Science
- All Subjects Of Class 9