Student Projects/Physical change

Properties such as shape ,size, color and state of a substance  are called its physical properties.a change in which .A change in change of physical properties are called physical change.

Examples:

1.Crushing a can

2.Melting of ice cube.

3.shredding a paper.

4.Mixing of water and pebbles.

5.Boiling of water.

6.Dissolving salt in water.

When the shape ,size,appearance of a substance is altered,but its chemical composition remains same physical change of matter takes place.No new  substance is formed.It is a reversible change,by reversing the process the original substance can be obtained.It is temporary change. physical change occurs when objects or substances undergo a change that does not change their chemical composition .All physical changes are reversible but reversibility is not a certain criteria of classification and their mass does not change.some examples are changes of shapes .Physical changes could be melting, freezing ,boiling,evaporating and sublimation.phase changes are physical changes.many mixtures are a physical change. physical means appearance  ,physical change means appearance is only changed.many physical changes also involve the rearrangement of atoms noticeably in the formation of crystals.even magnetism is physical change, Ferry-magnetic materials can become magnetic .This process is reversible and does not affect the chemical composition