Author: Heba Soffar

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The types of sound waves

Sound waves There are two types of the sound waves which are the audible sounds and the non-audible sounds, The audible sounds such as the sonic waves, and the non-audible sounds such as the...

Sound waves 0

Nature and the properties of the sound waves

The sound The sound is an external factor that affects the ear causing the sense of hearing. and it produced due to the vibration of the bodies and it stops when the vibrating bodies...

Fossils types 0

The types of fossils and the ways of formation

The Fossils The fossils are the traces and the remains of the living organisms which are preserved in the sedimentary rocks, The traces of once old living organisms indicate its activity during its life...

Water in three states 0

The physical and the chemical properties of the water

Physical properties of the water  The water has a higher melting point, boiling point, and heat of vaporization than most common liquid. This fact indicates that there are strong forces of attraction between the...