MCQ Chapter 1 Science Class 6 Maharashtra Board MCQ For All Chapters – General Science Class 6Natural Resources – Air, Water and Land 1. What are the three spheres of the Earth?Atmosphere, Biosphere, CryosphereAtmosphere, Lithosphere, HydrosphereLithosphere, Cryosphere, BiosphereStratosphere, Mesosphere, ThermosphereQuestion 1 of 202. What percentage of the Earth's surface is covered by water?50%60%71%80%Question 2 of 203. What is the major component of the atmosphere?OxygenCarbon dioxideNitrogenArgonQuestion 3 of 204. Which gas is essential for respiration?NitrogenOxygenCarbon dioxideArgonQuestion 4 of 205. Which gas is used in fire extinguishers?OxygenCarbon dioxideNitrogenHeliumQuestion 5 of 206. Which gas helps plants in photosynthesis?NitrogenCarbon dioxideOxygenArgonQuestion 6 of 207. What is the role of the ozone layer?To absorb UV raysTo provide oxygenTo trap carbon dioxideTo generate rainQuestion 7 of 208. What percentage of oxygen is present in the atmosphere?10%21%50%78%Question 8 of 209. What is the major cause of air pollution?Increased oxygenEmission of harmful gasesDecreased nitrogenIncreased water vaporQuestion 9 of 2010. What is the smallest proportion of gas found in the atmosphere?ArgonCarbon dioxideNitrogenOther inert gasesQuestion 10 of 2011. What happens to air as altitude increases?It becomes denserIt remains the sameIt becomes rarerIt turns into liquidQuestion 11 of 2012. What is the universal solvent?AirWaterSoilOxygenQuestion 12 of 2013. Which component of soil is formed by the decomposition of plants and animals?HumusSandClayGravelQuestion 13 of 2014. What is the process of breaking down rocks into soil called?EvaporationWeatheringCombustionCondensationQuestion 14 of 2015. What percentage of fresh water is available for drinking?0.3%1.5%2.7%10%Question 15 of 2016. What is the best way to prevent soil erosion?Removing vegetationIncreasing green coverBurning dry leavesDigging more wellsQuestion 16 of 2017. Which gas is used in electric bulbs?OxygenArgonHeliumNitrogenQuestion 17 of 2018. What is the main function of the India Meteorological Department (IMD)?Air pollution controlStudying and forecasting weatherOceanic researchSoil analysisQuestion 18 of 2019. Which gas is used in neon lights?NeonKryptonXenonArgonQuestion 19 of 2020. How many years does it take for 2.5 cm of mature soil to form?100 years500 years1000 years2000 yearsQuestion 20 of 20 Loading...
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