1) Who invented the first functional telephone? a) Einstein b) Abdul Kalam c) Copernicus d) Newton e) Alexander Graham Bell 2) Which organ covers the entire body and protects it? a) Skin b) Liver c) Brain d) Heart e) Eye 3) What is Earth's only natural satellite ? a) Sun b) Venus c) Moon d) Mars e) Jupiter 4) What is the primary energy source of Earth? a) Sun b) Moon c) Water d) Air e) Fire 5) What is the lightest gas present abundantly in the universe a) Oxygen b) helium c) Ozone d) CO2 e) Hydrogen

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