Amal was on a picnic to Hatta with his parents and family friends. While playing, he collected some muddy water from the Wadi in
his beaker, which he wanted to make pure and clean. A) What do you think will happen to the mud in his beaker if left overnight? B) What is this process called?
A) <u>The mud in Amal's beaker will settle down at the bottom of the muddy water if left overnight with clear water occupying the surface.</u> This is because the particles of mud are insoluble in water and will settle down at the bottom of the muddy water if left undisturbed for a while.
B) The process is called sedimentation. The settled mud particles are referred to as the sediments and the clear water at the top can be decanted off to separate the sediment from the water.
The principle is called CEPHALOCAUDAL PRINCIPLE. This principle proposed that growth follow a particular pattern in which the head and the upper part of the body grow first before the growth proceeds to other part of the body.
