Importance of the water and its structure
The importance of the water There are no living organisms that can live without water as it is the medium through which all the vital processes take place, The water in the oceans and...
Category: The Matter
Matter construction and properties of molecules of matter
The molecules The matter consists of very small structural units known as the molecules, The molecule is the smallest part of the matter which can exist freely, and it has the properties of the...
Metals and nonmetals, Economic importance of some metals and nonmetals
Every day, we can see the matter around us which has a mass and a volume. The matter may exist as an element or a compound, The element is the simplest form of matter that can...
What is the difference between physical and chemical changes?
The essential difference between physical and chemical changes lies in whether the substance’s composition is altered or remains the same during the change. Understanding the differences between physical and chemical changes helps to identify...