1. Complete the following table (Carefully study the carbon, oxygen, and nitrogen cycles). Bio-geochemical cyclesBiotic ProcessesAbiotic Processes1. Carbon cyclePhotosynthesis, respiration, decompositionCombustion, volcanic activity, diffusion in oceans2. Oxygen cycleRespiration, photosynthesisOxidation, ozone…
1. In many villages, people accuse women for giving birth to a girl child instead of a male child. Do you think they are scientifically correct? Answer. No, this belief…
1. Pranjal gets angry in every new situation. Which chemical is responsible for causing this emotion within her? Name the organ that releases the chemical. Answer. When Pranjal gets angry,…
1. Mayank found a slide in the laboratory without a label. When he viewed it under a microscope, he saw that it had cells with a thick cell wall and…
1. Palak says she saw real dinosaurs in a national park in America. Do you think she is speaking the truth? Why? Answer: No, Palak is not speaking the truth.…
1. Can white phosphorous be used as a fuel? Answer: No, white phosphorus is not suitable for use as a fuel.Although it burns easily in air at room temperature (undergoing…
1. Can we store copper sulphate solution in an iron container? Answer: No, we cannot store copper sulphate solution in an iron container.This is because iron is more reactive than…
1. Why are PVC pipes preferred over iron pipes for water supply to homes and in sewer systems? Answer: PVC pipes are preferred over iron pipes because they are lightweight,…
1. The baker wants to bake a spongy bread. Which of these should he use and why? Answer: The baker should use yeast.Yeast is a microorganism used in baking. When it…
1. Kishan always adopts the process of mixed cultivation for getting a higher yield of a crop. However, he always needs to keep adding more fertilizers in this method. Can…