1. Beginning with the letter 'F", what nam is given to a duct , or chimney   which conveys exhaust gases  from a fireplace , furnace , boiler  etc to the outdoors
2. What name is given to the force  per unit area  applied in a direction perpendicular  to the surface of an object
3. What are generally referred to as the 3 classical states of matter
4. In the metric measuring system, what is a megametre
5. What is a Clepsydra  a) water clock  b) temperature gauge  c) barometer  d) sundial
6. Beginning with the letter "E", what name is given to a mobile piece of heavy equipment  consisting of a boom , bucket  and cab, often on a rotating platform
7. What name beginning with the letter "P" is given to a raised walkway  over water, supported by widely spread piles  or pillars
   
8. What name is given to the process by which an object is suspended by a physical force  against gravity , in a stable position without solid physical contact.
9. Beginning with the letter 'C", what name is given to a rotary electrical  switch  in certain types of electric motors  or electrical generators  that periodically reverses the current  direction between the rotor and the external circuit
10. Zn is the chemical symbol for what
    
    Bonus Question
    What am I
    I am a chemical element
    I am a multivalent nonmetal of the nitrogen group
    I am commonly found in inorganic rocks
    Elementally I exist in 2 major forms, white and red
    I am an essential element in all living cells
    I am widely used in explosives, friction matches, pesticides, toothpastes and detergents
    I was produced during of an experiment by German alchemist Hennig Brand in 1669 when he was attempting to create the Philosophers Stone from his own urine
    My chemical symbol is P
    
    
    Hold down the left mouse button and drag below - to reveal the answer

1) Flue  2) Pressure  3) Gas, Liquid, Solid  4) 10 to the power 6 metres  5) a) water clock  6) Excavator  7) Pier  8) Levitation 9) Commutator  10) Zinc

Bonus Question - I am Phosphorus