Children everywhere wonder about the world around them. The questions they ask are the beginning of scientific inquiry. Given below are some questions that children in India have asked Professor Yash Pal and Dr Rahul Pal as reported in their book, Discovered Questions (NCERT, 2006). (i) What is DNA fingerprinting? What are its uses? (ii) How do honeybees identify their own honeycombs? (iii) Why does rain fall in drops? Can you answer these questions? You will find Professor Yash Pal’s and Dr Rahul Pal’s answers (as given in Discovered Questions) on page 75.
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an element is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei. Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by chemical
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Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
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