Management Of Natural Resources Science - Management Of Natural Resources

Which of the following is not a fossil fuel?

Khadins are used in Rajasthan to:

The use of one of the following is eco-friendly. This one is:

Snakes are killed in large numbers because:

Write the full names of:

1. CFL, and
2. CFC.

What is the main purpose of rainwater harvesting?

Name two fossil fuels.

What is meant by “sustainable development”?

Name the rivers with which the following dams are associaL.

1. Tehri Dam.
2. Sardar Sarovar Dam.
3. Bhakra Dam.

Although coal and petroleum are produced by the degradation of biomass, even then we need to conserve them. Why?

What measures would you take to conserve electricity in your house?

Is water conservation necessary? Give reasons.

Describe briefly the ‘khadin’ system of rainwater harvesting practised in Rajasthan.

Why should fossil fuels like coal and petroleum be used judiciously?

Explain briefly, how rainwater harvesting is done from open spaces around the buildings in city areas.

Describe how, the water of river Ganga has been highly polluted.

Write a short note on ‘Chipko Andolan’ (Hug the Trees Movement).

Describe some of the problems associated with the construction of dams.

What are the various advantages of water stored in ground?

Why do we need to manage our natural resources?

A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking.

1. Name the device X.
2. What is the source of energy which cooks food in this device?
3. What is the name of the process which traps energy in this device?
4. State one advantage (other than saving on fuel) or using such a device for cooking food.

There are two important fuels A and B both of which are extracted from deep inside the earth. Fuel A is a thick, dark, foul smelling liquid whereas fuel B is a black solid. Combustion of both the fuels produces products, C, D, E and F. The product C makes the rainwater only slightly acidic but it is mainly responsible for causing global warming. The product D is neither acidic nor basic. It is harmless and does not affect the environment in any way. Both E and F attack breathing system of humans and are mainly responsible for causing acid rain. In addition to combustion of fuels A and B, the product F is also formed when lightning occurs in the sky.

1. What are (i) fuel A, and (ii) fuel B?
2. Name (i) C (ii) D (iii) E, and (iv) F?
3. What is the process of formation of F during lightning known as?
4. Which fuel is supposed to be exhausted sooner : A or B?
5. Which fuel is mostly used for generating electricity at thermal power plants?

Explain why, despite good rains, we are not able to meet the demand for water of all the people in our country.

Fill in the following blanks with suitable words:
One of the main aim of management of forests and wildlife is to conserve the _________ which we haveinherited.

Fill in the following blanks with suitable words:
Khadin is a traditional _________ harvesting system in Rajasthan.

Fill in the following blanks with suitable words:
LPG is a _________ fuel but biogas is not a ________ fuel.

Fill in the following blanks with suitable words:Glaciers are a source of __________.

Fill in the following blanks with suitable words:
When a fuel burns in an insufficient supply of air, then some poisonous gas called ____________ is also produced.