Assalamualaikum w.b.t & a very good evening,
The first topic in Primary 5 Science is MICRRORGANISM.
Followed are the pictures of two experiments conducted in my class in the beginning of year 2012.
Growth of microorganisms ( patches of fungi) on orange skin.
the oranges were left in the lab at room temperature for 4 days.
These are the pictures of the oranges taken on the 4th day of experiment.
observation : bigger size of fungi patches could be seen on the skin day by day
conclusion : microorganism grow
Another experiment was regarding 'microorganisms breathe'
4 beakers of same size of dough were added with 1/2 tablespoon of yeast,1 tablespoon of yeast,2 tablespoon & 3 tablespoon respectively.
observation : the more yeast added to the dough the higher it risen
conclusion : microorganisms breathe( produce air bubbles, the dough risen)