science changes around us

CHANGES AROUND US

DONE BY:AYISHA KHATOONGRADE:6

SUBMITTED TO: MRS.JAYA RAMESH

INTRODUCTIONChanges can occur every where at anytime.

Changes differ from each other, example; melting of ice ; burning of paper etc. Different types of changes are- REVERSIBLE CHANGE, IRRIVERSABLE CHANGE, PHYSICAL CHANGE AND CHEMICAL CHANGE.

REVERSIBLE CHANGE

Reversible change is an effect on a substance which can then

be returned to its original state. The change alters only

the physical state of the substance. However, no new substance is formed.

IRRIVERSIBLE CHANGE

An irreversible change is a change that you cannot undo. For example, if you burn a book, there is no way to restore it. Even if you carefully collect all the ashes, and all the smoke and other gas that is produced by the fire, there is no possible way of processing these materials to make them come back together.

CHEMICAL CHANGE

A chemical change produces a new substance. Examples of chemical changes are burning , cooking an egg.

A chemical change produces a new substance. Examples of chemical changes are burning , cooking an egg.

CHEMICAL CHANGE

PHYSICAL CHANGE

A physical change does not produce a new substance . Examples of physical changes include crushing can, melting an ice cream etc.

10 EXAMPLES OF

CHANGES

MELTING OF ICE (reversible change)

BLOWING A BALLOON(reversible change)

BURNING OF PAPER(chemical change)

BAKING A CAKE(Chemical change)

COOKING AN EGG(chemical change)

BREAKING A GLASS(physical change)

BOILING WATER(physical change)

BLOOMING OF FLOWER

(irreversible change)

RIPENING OF FRUIT(irreversible change)

CRUSHING A CAN(physical change)

TEARING A PAPER(irreversible change