1.other uses of the archimedes screw
a. it is also can be called archimedean screw and the screw pump.




2.paper making through the ages.
a.


start: ancient egypt + travel through
times today.


include:- what was used
- the path travelled around the world
include:samarand.
-what relevant has religion to the spread and develop of paper.


what materials have been used?


when was wood pulp first used paper making in thailand paper making in new zealand.

christchurch water

1. Chch stormwater: -What is it?

                             -Where does it go?

                             -What contaminates it?

2. Chch wastewater: - What is it?

                                 -Where does it go?

                                 -What contaminates it?

3. (i)Where does chch get its water?

    (ii)How is it purified?

    (iii)What pollutes our city water before we drink it?

4.Where does Aucklands water supply come from?

                (may be more than 1 place)

5. What bourne diseases and parasites can we catch in NZ? ( Hopefully not in chch!)

-What do they do to us

6. Chch's waste water is treated after use.

-where is it treated?

-what are the steps involved in treating it?

-what happens at each step?

-how long does each step take?