SSC MCQ Question Ans.Water for Life
SSC MCQ Question Ans.Water for Life. Introduction: Life is the other name of water. We obtain water from different sources. The sources of such an important resource are being polluted in many ways. Water is one the naturally abundant liquid matter. In the human body, around 65-75% is water. Similarly meat, fish, vegetables etc. may contain 60-90% water. Seventy-five percent of the earth surface is covered by water which is also very important for human survival. So it is said, “water is the other name of life”. Now let us know some important properties of water.
What is the melting point and boiling point of water? When water is in solid state, we call it ice. The temperature at which ice melts is called its melting point which is 0°Celsius. On the other hand, at atmospheric pressure, the temperature at which a liquid boils is called its boiling point. Boiling point of water is 99.980Celsius which is very
close to 100°Celsius. That is why we generally say that boiling point of water is 100°Celsius. Pure water is colourless, odourless and tasteless. Do you know what the density of water is? Density of water depends on temperature. The density of water is highest at 4°Celsius and it is 1gram/cc or 1000kg/m3 which means at 4° Celsius, the mass of 1cc of water is 1 gram or the mass of 1 m3 of water is 1000kg.
teachingbd24.com is such a website where you would get all kinds of necessary information regarding educational notes, suggestions and questions’ patterns of school, college and madrasahs. Particularly you will get here special notes of physics that will be immensely useful to both students and teachers. The builder of the website is Mr. Md. Shah Jamal Who has been serving for 30 years as an Asst. Professor of BAF Shaheen College. He expects that this website will meet up all the needs of Bengali version learners /students. He has requested concerned both students and teachers to spread this website home and abroad.