We are now on our fifth module in studying the world of Physical Science. I know that you are all excited to learn new things.

As the famous saying goes ―nothing is permanent in this world except the word ‗change‘.‖ Everything that surrounds us undergoes transformation — from the food that fills our stomach, to the basic necessities that we use every day, to the stars and heavenly bodies that light up our skies and even you. Yes, you. You undergo a series of transformation every single day. Since well before the beginning of recorded history, natural substances have been purposely changed into new products. The changes brought about by humans for their own use include conversion of natural clay into pottery, limestone rock into building materials, and metals, like silver and gold, into jewelry pieces..

Lets' start our lesson!