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Q. No. 1: Encircle the correct option: /40 _ is the outermost layer of the earth and is just like a thin, solid skin.a. Crust b. Mental c. Core d. None Geologists have been able to differentiate between the earth layers with the help of_ waves.a. Seismic b. Inner c. Semi d. Plates Trees have… Continue reading Previous paper class 6th(S.St)