CBSE ADDA

Chairman SDV Pankaj Jee The Sadhana Devi Vidyapith is located at Punjabi Colony, Dharampur Nistama.  The school was established in year 2000. It is a Co-educational school and offers education in English medium,running under the aegis of Sadhana Devi Memorial Seva Sansthan, Samastipur. Sadhana Devi Vidyapith is a school providing quality education to the student under the guidance of experienced teachers and a very well organized trust handle the all working, so that your kids can get the best. We are an affiliated school from C.B.S.E. till standard 10th. School Name: Sadhana Devi Vidyapith Affiliation Number: 330386 Type of Affiliation: Provisional Affiliation Period From: 1/4/2012 Affilation Period To: 31/3/2015 State: Bihar District: Samastipur Pin Code: 848101 Office Phone No: 06274-225126

Discovery of Cell Robert Hooke at first examining a thin slice of dead cork [the bark of a tree] through a self-designed microscope in 1665. Robert Hooke predicts that the cork resembled the structure of a honeycomb consisting of many little boxes. He called these boxes cells. He described about this in his book “Micrographic”.  Cell is a Latin word which means ‘a little room’. The word cell was derived from a Greek word “Cellulae” which means small room. First living cell was discovered by A.V. Leeuwenhoek with the improved microscope in pond water. Q. What are Living Organisms made up of? Answer: All living organisms that we observe around us are made up of cells. Q. Who gave the cell theory? What does it state? Which organism is an exception of cell theory? Answer: Two biologists, “Schleiden and Schwann” gave the “Cell theory” which was later on expanded by “Rudolf Virchow”. Cell theory states that (a) All plants and animals are composed of cells. (b) Cell is the ba

1. Radiation (a) does not require any medium (b) is the process of transfer of heat in liquids (c) is the process of transfer of heat in which heat traveles in one direction. (d) Occurs in solids. 2. A Thermos flask prevents loss or gain of heat by a. conductions only b. convections only c. radiation only d. all the above 3. Handles of cooking utensils should be made of material that a. conducts heat well b. does not conduct heat c. radiate heat well d. does not radiate heat 4. Sea breeze and land breeze a. are caused by currents set up in air due to conduction b. are caused by currents set up in air due to convection c. are caused by currents set up in air due to radiation d. have no relation to conduction, convection and radiation 5. Which of the following is the best heat insulator a. air b. steel c. copper d. iron 6. He