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Social Studies, Lesson-15 Knowing Our Earth, Answer the following questions:Q-1 Who first proved that the Earth is round and not flat?, A-1 Ferdinand Magellan was first to proved that the, Earth is round and not flat., Q-2 What is globe?, A-2 A globe is a small model of the Earth that shows, different continents, countries and oceans., Q-3 What are maps?, A-3 A map is a drawing of the whole or part of the, Earth on a flat surface., Q-4 What is a compass?, A-4 A compass is an instrument which shows us, directions with the help of a small magnetic, needle which always points to the North-South, , direction.