Important Questions for CBSE Class 9 Science Chapter 3 Atoms and Molecules IMPORTANT QUESTIONS 1 MARK QUESTIONS Question. 1. Name the scientist who laid the foundation of chemical sciences. How ? Answer. Antoine Laurent Lavoisier, by establishing two important laws of chemical combination. Question. 2. Define law of conservation of mass. Answer. It states that, 'Mass … [Read more...]
Important Questions for CBSE Class 9 Science Is Matter Around us Pure
Important Questions for CBSE Class 9 Science Chapter 2 Is Matter Around us Pure IMPORTANT QUESTIONS 1 MARK QUESTIONS Question.1. Define atomic number. How it is denoted ? Answer. Number of protons of an atom determines its atomic number. It is denoted by 'Z'. Question.2. What are nucleons ? Answer. Protons and neutrons present in the nucleus of an atom are called … [Read more...]
Important Questions for CBSE Class 9 Science Why Do We Fall III
Important Questions for CBSE Class 9 Science Chapter 13 Why Do We Fall III IMPORTANT QUESTIONS 1-MARK QUESTIONS Question. 1 Name any two groups of microorganisms from which antibiotics could be extracted. Answer. Bacteria and fungi. Harmful Effects of Microorganisms Question.2 Why are we advised to take blend and nourishing food when we are sick ? Answer. We are … [Read more...]
Important Questions for CBSE Class 9 Science Diversity in Living Organisms
Important Questions for CBSE Class 9 Science Chapter 7 Diversity in Living Organisms IMPORTANT QUESTIONS 1 MARK QUESTIONS Question. 1 Name one basic characteristic for classifying organisms. Answer. Cell structure. Question. 2 What was the modification introduced by Woese in kingdom Monera ? [SAII -2012] Answer. Carl Woese modified the Kingdom Monera by dividing it into … [Read more...]
Important Questions for CBSE Class 9 Science Work, Power and Energy
Important Questions for CBSE Class 9 Science Chapter 11 Work, Power and Energy IMPORTANT QUESTIONS 1-MARK QUESTIONS Question.1 Does work done depend upon the velocity of the body. [SAII-2014] Answer. No. Question.2 State the law of conservation of energy. [SAII-2014] Answer. It states that energy can neither be created nor destroyed. It can only change its … [Read more...]