Class 10 Science - Chapter Sustainable Management of Natural Resource NCERT Solutions | Can you suggest some changes in your sch

Find out about the traditional systems of water harvesting/management in your region.

Suggest some approaches towards the conservation of forests.

We saw in this chapter that there are four main stakeholders when it comes to forests and wildlife. Which among these should have the authority to decide the management of forest produce? Why do you think so?

List five things you have done over the last one week to —

(a) conserve our natural resources.
(b) increase the pressure on our natural resources.

Find out the source of water in your region/locality. Is water from this source available to all people living in that area?

How can you as an individual contribute or make a difference to the management of (a) forests and wildlife, (b) water resources and (c) coal and petroleum?

Why should we conserve forests and wildlife?

Compare the above system with the probable systems in hilly/mountainous areas or plains or plateau regions.

What changes can you make in your habits to become more environment-friendly?

What can you as an individual do to reduce your consumption of the various natural resources?

Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.

What is a good source of energy?

Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?

What are trophic levels? Give an example of a food chain and state the different trophic levels in it.

What is the difference between a reflex action and walking?

What is the importance of DNA copying in reproduction?

If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

Why should a magnesium ribbon be cleared before burning in air?

Define the principal focus of a concave mirror.

You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?

Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes?

Which metals do not corrode easily?

What are the limitations of extracting energy from—

   (a) the wind?          (b) waves?          (c) tides?

Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?

What are the qualities of an ideal source of energy?

Give the names of two energy sources that you would consider to be exhaustible. Give reasons for your choices.

The device used for producing electric current is called a

(a) generator.
(b) galvanometer.
(c) ammeter.
(d) motor.

Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).

Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.

How are fats digested in our bodies? Where does this process take place?