1. Who invented the miner's safety-lamp?   Sir Frank Whittle   Thomas Alva Edison   Sir Humphrey Davy   Alexander Graham Bell   Hint Half-n-half Clue   2. How many planets are there in our solar system?   8   9   10   12   Half-n-half Clue   3. The science that deals with the study of sound is known as acoustics.   True   False   4. Which planet is known as the Red Planet?   Earth   Mars   Jupiter   Mercury   Half-n-half Clue   5. The three states of matter are solid, liquid and gas.   True   False   6. Where is the Sea of Tranquility?   Near the Bermuda Triangle   In the Pacific Ocean   In the Atlantic Ocean   On the Moon   Half-n-half Clue   7. The tail of a comet always points towards the Sun.   True   False