Class 10 Science - Chapter Sustainable Management of Natural Resource NCERT Solutions | What would be the advantages of exploiti

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.

Why do you think that there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?

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

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?

By considering their position in the Periodic Table, which one of the following elements would you expect to have maximum metallic characteristic?
Ga     Ge      As     Se     Be

You are given a hammer, a battery, a bulb, wires and a switch.

(a) How could you use them to distinguish between samples of metals and non-metals?
(b) Assess the usefulness of these tests in distinguishing between metals and non-metals.

What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?

Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?

Write word equations and then balanced equations for the reaction taking place when –

(a) dilute sulphuric acid reacts with zinc granules.
(b) dilute hydrochloric acid reacts with magnesium ribbon.
(c) dilute sulphuric acid reacts with aluminium powder.
(d) dilute hydrochloric acid reacts with iron filings.

Show how you would connect three resistors, each of resistance 6 Ω, so that the combination has a resistance of (i) 9 Ω, (ii) 4 Ω.

What were the limitations of Döbereiner’s classification?

Why does the cord of an electric heater not glow while the heating element does?

What are the disadvantages of fossil fuels?

How does binary fission differ from multiple fission?