Author: Heba Soffar

The transfer of the heat energy . 6

The importance of the heat (thermal energy)

The heat The heat is a form of energy that transfers from the higher temperature object to the lower temperature object, and is transferred through the conduction, the convection and the radiation.

Acids 0

The types and properties of the acids

Types of the compounds There are a countless number of existing compounds, they can be classified according to their properties only into the acids, the bases (alkalis), the oxides and the salts.

Mass vs weight 0

What are the factors affecting the weight?

The weight The reason of object’s falling downward the Earth is a type of force called the weight (the gravitational force), and you can feel this force when you carry an object or try...