Can you suggest some changes in your school which would make it environment-friendly?
Some changes we can make in our school which would make it environmental- friendly. These are following:-
1. Plantation of the trees around the school campus, make loan to sit in the ground that will be more comfortable for the kids as well as the teachers.
2. We should switch off our lights, fans television and energy or light appliances when they are not in use.
3. Putting solar panels on the roof of the school instead of using generator because solar panel generators are silent and have no moving parts. Generators produce high amount of noise that comes from gas or diesel powered machines. Solar panels require less maintenance than generators.
4. By avoiding water waster while we are drinking.
5. By separating degradable or non- biodegradable wastes.
6. There can be more windows for saving the electricity bill or for the natural light consumption.
7. Reusing the paper for writing on both the sides or we can use pencil for the rough work so that we can use the paper for the multiple times.
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?
Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.
A shiny brown coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.
What are the qualities of an ideal source of energy?
Design an experiment to demonstrate hydrotropism.
What kind of mirror – concave, convex or plain – would be best suited for use in a solar cooker? Why?
What processes would you consider essential for maintaining life?
What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?
Give an example of a plant hormone that promotes growth.
Compare and contrast fossil fuels and the Sun as direct sources of energy.
Why is vegetative propagation practised for growing some types of plants?