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Oils are of three main kinds - vegetable, animal and mineral oil. Vegetable oil is obtained by crushing oil seeds. Mineral oil is pumped out from deep under the earth. Animal oil is got from the fat of the animals. To extract vegetable oil, the dried oil seeds are put in the rushing machine and oil is squeezed out. This is collected in containers. Mineral oil is pumped out by digging oil wells. These are found deep below the ground. Holes are drilled and oil is pumped or forced out. The crude oil is a source of many useful things. We get kerosene, petrol, and diesel out of the crude oil. We use most of the vegetable oils for cooking. Mineral oils are mainly used as fuels. Animal oil is used as medicine. For example, shark liver oil is given to strengthen the weaker children. Neem oil, sandalwood oil and lime oil also have medicinal values
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Make notes of the following passage and prepare a summary using the notes.
Butterflies - in garden - all different colours - 50,000 - kinds of butterflies. Suck - nectar - feelers help find its way - tube mouth suck nectar - tiny holes breathe - four stages egg-butterfly - William words worth - poem on butterfly - sleeping (or) feeding.
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