Documents Density Sub Marine Activity

Slide 1 Our previous lesson Density is the mass per unit volume We have carried out some activity about density We compared the density of substances 2) We draw the layer…

Documents Chemical water testing. Chemical hardness testing of drinking water Our water has a hardness of...

Chemical water testing Chemical hardness testing of drinking water Our water has a hardness of 28dH which means that the water is hard Testing pH Our drinking water has a…