Question

Studying in the Light of a Lantern	Use of Mineral Oil
A pinwheel winnowing	Using natural Gas as fuel
A Solar Energy Panel

Observe the picture and answer the questions.

• Which energy resource is used in figure (Studying in the Light of a Lantern) to obtain light?
• Where did this resource come from?
• Figure (Use of Mineral Oil) shows fuel being filled in a motorcar. From where was this energy resource brought to the pump?
• Figure (A pinwheel winnowing) shows Malati with her pinwheel and her father winnowing grain. Who is helping both of them?
• Which energy resource is used for lighting a · lamp, running a rickshaw and heating oil as shown in Figure (Using natural Gas as fuel)?
• What are the various purposes for which man can use sunlight?
• For which of the above energy resources do we hove to spend money?
• Which of these energy resources are available free of cost?

Answer 1

• Kerosene is used in the lantern to obtain light.
• Kerosene is obtained from mineral oil or petroleum, which is extracted from beneath the Earth’s surface.
• The fuel was brought to the petrol pump from a petroleum refinery, where crude mineral oil is processed.
• Wind is helping Malati’s pinwheel to rotate and her father to winnow the grain.
• Natural gas is used in the form of LPG and CNG for these purposes.
• Sunlight can be used for drying clothes and grains, heating water, cooking food, and generating electricity through solar energy.
• We have to spend money on kerosene, petrol, diesel, LPG and CNG.
• Sunlight and wind energy are available free of cost.