1. The three methods of science are observation, experimentation and _______.   inference   deduction   hypothesis   measurement   Hint Half-n-half Clue   2. Which of the following is necessary for burning (combustion)?   Carbon   Nitrogen   Petrol   Oxygen   Half-n-half Clue   3. How many planets are there in our solar system?   8   9   10   12   Half-n-half Clue   4. What is the name given to molten rocks erupted by a volcano?   Firestone   Geyser   Lava   Crater   Half-n-half Clue   5. The Earth is surrounded by an insulating blanket of gases which protects it from the light and heat of the Sun. This insulating layer is called the   Biosphere   Atmosphere   Hydrosphere   Lithosphere   Half-n-half Clue   6. Which rare element would you associate with Marie and Pierre Curie?   Uranium   Platinum   Gold   Radium   Half-n-half Clue   7. Who discovered the circulation of blood?   William Harvey   Louis Pasteur   Hargobind Khorana   Edward Jenner   Half-n-half Clue