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Cement and concrete
Secure a small bag of Portland cement. Have the pupils mix it with water and put it in tin can covers, paper cups, or small pasteboard boxes unless it hardens. Study its appearance and its properties. Break a piece of cement and study it. Mix the dry cement with about twice as much sand or gravel. This will form concrete. After adding water and mixing thoroughly place it in moulds. Permit these to arden various days. Again study the appearance and the characteristics of these samples.
Frost in the classroom Frost can be made in the classroom by using a tall metal container like as a tin can. Pack the can with exchange layers of ice and salt, using about doub
Illustrating an eclipse of the sun Hold a small coin a few inches from one eye and close the other eye while looking at the lighted electric bulb on the ceiling of a room. The
methods of heat transfer
What is tocopherols Vitamin E refers to a group of compounds known as which are the derivatives of a parent compound called as 'tocol'. Four tocopherols namely a, P,
Transport of Bulk Chemicals : Ideally only sufficient concentrated acids, flammable solvents and other hazardous chemicals should be kept in the laboratory for immediate requireme
Mechanical or Physical Weathering Processes A rock broken into smaller pieces is said to be physically or mechanically weathered. It has a large exposed surface area which fur
First Hominids The First Human Fossil The earliest human like or hominid remains come from two separate East African sites. Ethiopia has yielded several hundred fossil fragment
INTRODUCTION : This exercise is based on here 'Laws and Regulations' of this course. What are we going to do in this exercise? - This might be the question arising in your mind. I
Explain the Menstrual Phase - Menstrual Cycle If the ovum is not fertilized, a high level of progesterone in the blood inhibits the activity of pituitary gland and the producti
What is Immunity? Amino acids are involved in giving immunity by maintaining the vulnerable surfaces of the body in such a way so as to resist infections. Most of the external
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