1) The ............. is the layer of earth on which we live. a) Crust b) Core c) Mantle 2) The ................ is the innermost layer of Earth. a) Crust b) Core c) Mantle 3) A ............ is a natural feature of the surface of Earth. a) Mantle b) Landform c) Crust 4) A.......... is a low flat land. a) Mountain b) Hill c) Plain 5) ............... is the planet where we live. a) Earth b) Mantle c) Core

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