NG OF SHADOWTo study the relationship between the distance of the source of light from the object and the size of shadow.STESEN 7 & 8: FORMING OF SHADOWTo study the relationship between the distance of the object from the screen and the size of shadow.STESEN 9 & 10: MICROORGANISMTo show that microorganism breath.STESEN 11 & 12: ACID AND ALKALITo test whether a food is acidic or alkaline4.45 ??? 5.