List any two traditional systems of water harvesting. [Foreign]
Two traditional systems of water harvesting are:
State two changes you can make in your habits to reduce the consumption of electricity or water. [All IndiaiC)]
Name the products of combustion of fossil fuels like coal and petroleum products. How do they affect us and our environment ?
Why do you think there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?
In a village in Karnataka, people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their field in order to enhance the yield. Soon they discovered that the water body was completely covered with green floating plants and fishes started dying in large numbers. Analyse the situation and give reasons for excessive growth of plants and death of fish in the lake.
What is an equitable distribution of resources in a society and why is it necessary? State any two factors which work against an equitable distribution of resources. [Foreign]
Name the rivers with which the following dams are associated :
Name the rivers with which the following dams are associated :
(a) Tehri Dam
(b) Sardar Sarovar Dam
(c) Bhakra Dam
(a) What is a natural resource ? Name three important natural resources.
(b) Why do we need to manage our natural resources ?
Suggest three ways to maintain a balance between environment and development to survive. [Delhi]
Give two examples each of the following:
Apart from the availability of forest products, name two other things which are affected by the destruction of forests.
Which fossil fuel is conserved :Which fossil fuel is conserved :
(a) when we save on electricity ?
(b) when we use bicycle for covering short distances instead of a motorbike ?
(a) State the advantages of constructing dams across the rivers.
(b) Describe some of the problems associated with the construction of dams.
Why must we conserve our forests? List any two causes for deforestation to take place. [Delhi]
Name any four categories of people who depend on the forest resources, mentioning major needs of each category. [Foreign]
Which of the two is a better option, (i) to collect rainwater in ponds or artificial lakes, or (ii) to let it recharge groundwater by water harvesting? List two advantages of the option to justify your answer. [Foreign]
The pH of a river water sample as measured by pH paper is found to be 6. What does it tell us about water ?
(a) Locate and name the water reservoirs in figures (a) and (b).
(b) Which has an advantage over the other and why?
An environmentalist on visit to your school suggested the use of three R’s to save the environment. Explain what he meant by three R’s and how you would follow his advice at home. [All India]
List any two causes of our failure to sustain availability of underground water.[Foreign]
State any four personal choices you would like to make to reduce energy consumption without affecting the quality of life or work explaining how each one of them would help you to do so. [Foreign]
List three problems which arise due to construction of big dams. Suggest a solution for these problems. [All India]
List the products of combustion of fossil fuels. What are their adverse effects on the environment? [All India]
Name the bacteria whose presence in water indicates the contamination with disease-causing micro-organisms.
What is the name of the process in which rainwater falling on the earth is stopped from flowing and made to percolate into the ground ?
Give one example to show how the participation of local people can lead to the efficient management of forests.
(a) What is meant by rainwater harvesting ? Name some of the ancient structures used for rainwater harvesting by the rural people.
(b) What are the various advantages of water stored in ground ?
In the context of conservation of natural resources, explain the terms reduce, recycle and reuse. From among the materials that we use in daily life, identify two materials for each category.
State the meaning of “sustainable management”. Reuse is better than recycling. How? [Foreign]
How did ‘Chipko Andolan’ ultimately benefit the local people? Describe briefly. [Foreign]
Fill in the following blanks with suitable words :Fill in the following blanks with suitable words :
(a) LPG is a ……………fuel but biogas is not a…………. fuel.
(b) Glaciers are a source of…………………..
(c) One of the main aim of management of forests and wildlife is to conserve the……………….which we haveinherited.
(d) Khadin is a traditional………………………..harvesting system in Rajasthan.
(e) When a fuel burns in an insufficient supply of air, then some poisonous gas called ……………………….. is also produced.