1. The atom is made of   Protons, Neutrons and Electrons   Neutrinos, Gamma Rays and Positrons   Positrons, Neutrons and Electrons   Protons and Quarks   Hint Half-n-half Clue   2. Who discovered the circulation of blood?   Hargobind Khorana   Louis Pasteur   William Harvey   Edward Jenner   Half-n-half Clue   3. Which gas in the atmosphere protects us from harmful ultraviolet radiations?   Ozone   Nitrogen   Oxygen   Carbon Dioxide   Half-n-half Clue   4. The Sun is a   Satellite   Comet   Star   Huge Planet   Half-n-half Clue   5. A communicable disease can be passed on from one person to another.   True   False   6. The tail of a comet always points towards the Sun.   True   False   7. What is the name given to molten rocks erupted by a volcano?   Geyser   Crater   Lava   Firestone   Half-n-half Clue