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…
Short Answer Type Questions 1. Why is there a need to create protected areas such as wildlife sanctuaries, national parks, and biosphere reserves? Answer: Protected areas are created for several crucial…
1. Tick [√] the correct option. a. Which of the following correctly defines the term ‘ecosystem’?i. The narrow zone of contact between the lithosphere, the hydrosphere, and the atmosphere.ii. Complex…
1. Tick [√] the correct option. a. Why is the Earth known as the ‘blue planet’? Choose the most appropriate reason.i. The Earth’s atmosphere is filled with a layer of…
A. Choose the correct option. 1. This animal does not give wool. a. Goat b. Sheep c. Cow d. Camel Answer: (c) Cow 2. This is two humped camel found…