1. Physical and Chemical
change
Angel Faith P. Pastolero

2. Objectives:
At the end of the lesson, you should be
able to:
1. Differentiate between physical and
chemical change.
2. Give examples of physical and
chemical change.

3. Physical
change
Chemical
change
Matter undergoes two types of
changes….

4.  Involves change in physical properties,
such as size, shape, and density , or
changes in phase without undergoing a
change in the composition of the
substance.
 Changes are reversible
Physical Change

5. Examples of Physical Change
1. Melting of ice

6. Examples of Physical Change
2. Tearing of paper into small pieces
What
happened to
the size of the
paper?
• Kindly get
a piece of
paper.
•
• Tear it into
three part.

7. Examples of Physical Change
3. Blowing of a balloon

8. Chemical change
 In chemical change, matter undergoes
change in its composition and/or structure.
 New substances are formed that have
different properties and composition from
the original material.
 Changes are irreversible

9. Evidences of chemical change
 Change in color
 Formation of a solid compound or
precipitate
 Release of a gas
 Release or absorption of heat

10. Examples of Chemical Change
1. Rusting of Iron

11. Examples of Chemical Change
2. Burning of
Paper
Can we turn back the
ashes into paper?
?

12. Examples of Chemical Change
4. Curdling
of Milk
3.Ripening of
Fruits

13. Summary
Physical Change
• Change of matter
from one form to
another without
changing its chemical
composition
• Reversible
Chemical Change
• Change that occurs
when one more
substances change
into entirely new
substances with
different properties
• Irreversible

14. A B
Evaluation
2. Give 2 examples of physical change
and 3 examples of chemical change we
can observe in our environment.
1. Identify which of the two
image shows physical
change and which shows
chemical change. Explain
your answer .

15. References
Magno M.C et al.(2009). Science and
Technology Textbook for Third
Year(reprint edition).Vibal publishing
house, Inc. pp 72-74
www.google.com- Images