MCQ Chapter 7 Class 7 Science Curiosity NCERT Advertisement Heat Transfer in Nature 1. What are underground layers that store water called?AquifersRiversGlaciersCloudsQuestion 1 of 202. Why are clay cups used for drinking tea?They conduct heatThey are poor conductorsThey radiate heatThey absorb heatQuestion 2 of 203. In the water cycle, what forms clouds?EvaporationCondensationPrecipitationInfiltrationQuestion 3 of 204. Why are two thin blankets warmer than one thick blanket?They conduct heatThey trap air, a poor conductorThey absorb heatThey radiate heatQuestion 4 of 205. What is the primary source of heat for Earth?FireSunCandleMetalQuestion 5 of 206. In Activity 7.3, why does water at the beaker’s bottom rise?It becomes heavierIt becomes lighter when heatedIt is pushed by the candleIt is coolerQuestion 6 of 207. Why do coastal areas get cooler air during the day?Land breezeSea breezeConductionRadiationQuestion 7 of 208. What is the purpose of ice stupas in Ladakh?Conduct heatStore water for springRadiate heatPrevent evaporationQuestion 8 of 209. Which heat transfer process requires no medium?ConductionConvectionRadiationInfiltrationQuestion 9 of 2010. Why does soil cool faster than water at night?It conducts heat betterIt loses heat fasterIt traps airIt absorbs heatQuestion 10 of 2011. What is a bukhari used for in Himalayan homes?Cooling roomsWarming roomsStoring waterConducting heatQuestion 11 of 2012. What is water evaporation from plants called in the water cycle?PrecipitationCondensationTranspirationInfiltrationQuestion 12 of 2013. Why are dark-coloured clothes worn in winter?They reflect heatThey absorb heatThey trap airThey conduct heatQuestion 13 of 2014. In Activity 7.1, what happens if a wooden strip is used?Pins fall fasterPins do not fallPins fall togetherPins meltQuestion 14 of 2015. What provides heat for melting ice cubes in a dish?Conduction from dishRadiation from surroundingsConvection in airEvaporationQuestion 15 of 2016. Why is a smoke detector best placed on the ceiling?Smoke sinksSmoke risesIt is easier to installIt conducts heatQuestion 16 of 2017. In Activity 7.5, why is water seepage slowest through clay?Clay has wider spacesClay has smaller spacesClay conducts heatClay absorbs heatQuestion 17 of 2018. What replenishes groundwater?EvaporationRainwater harvestingConductionRadiationQuestion 18 of 2019. Which processes are involved in a bukhari for cooking?Only conductionOnly convectionOnly radiationAll three processesQuestion 19 of 2020. Why do wet clothes dry faster on a sunny day?ConductionConvectionRadiation from SunInfiltrationQuestion 20 of 20 Loading...
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