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1. Choose the correct option. a. The __________ of a mirror is the centre of the sphere of which the mirror is a part.(i) Centre of curvature  (ii) Radius of curvature  (iii)…

1. Choose the correct option. a. In asexual reproduction, only one parent is needed, resulting in offspring that are genetically identical to the parent.Which method of asexual reproduction takes place…

A. Choose the correct option Pressure can be defined asa. Force per volumeb. Force per capacityc. Force per unit aread. Twice the force Answer: c. Force per unit area An open-tube…

A. Choose the correct option. The unit of force isa. Metreb. Centimetrec. Newtond. SecondAnswer: c. Newton Force can change the ______ of an object.a. Speedb. Direction of motionc. Shaped. All…

A. Choose the correct option. Orchids are commonly found in a. Tropical rainforests The type of forests that have very low temperatures, often below zero degrees b. Boreal forests Rock-like structures made…

Let Us Exercise 1. Choose the correct option. a. Which option correctly classifies a natural resource?i. Soil – Exhaustibleii. Natural gas – Inexhaustibleiii. Coal – Exhaustibleiv. Water – Exhaustible Answer: iii.…

1. Match the items in column 'A' with the proper ones in column 'B' and explain their impact on the environment. Harmful waste – c. Radioactive materialImpact: Causes long-term radiation damage to…

1. Complete the statements using the proper option from those given below. Explain the statements.(mycotoxins, budding, rhizobium) a. Yeast reproduces asexually by the budding method.Explanation: In budding, a small outgrowth (bud) forms on…

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…