(g) What are the non-conventional energy resources ?
(g) Non-conventional energy resources, also known as renewable energy resources, include solar energy, wind energy, tidal energy, hydroelectric power, energy obtained from oceanic waves, and atomic energy.
(h) Which forms of energy from the sun are used in solar energy devices ?
(h) Solar energy devices utilize two main forms of energy from the sun: heat energy and light energy. Heat energy is used in solar cookers and water heaters, while light energy is harnessed by solar cells to produce electrical energy.
(i) Why should we maximise the use of non-conventional energy resources ?
(i) We should maximize the use of non-conventional energy resources because they are sustainable and do not deplete natural resources or contribute to environmental pollution. They also reduce our dependence on finite and polluting fossil fuels, which is crucial for mitigating climate change and preserving the environment for future generations.
Who is the odd-one-out ?
(1) Diesel, crude oil, natural gas, wind – Wind is the odd-one-out because it is a renewable source of energy.
(2) A running car, hauling a log, a book kept on a table, picking up the school bag. – A book kept on a table is the odd-one-out because it does not involve any form of mechanical work.
(3) Sunlight, wind, waves, petrol – Petrol is the odd-one-out because it is a non-renewable fossil fuel.
(4) Leaving the fan on in a vacant room,leaving the TV on while working,using AC during winter, putting off the light when going out.–Using AC during winter is the odd-one-out because it involves unnecessary energy consumption