The document discusses changes in matter for grade 4, highlighting the difference between physical and chemical changes. Physical changes are characterized by changes in size, shape, or phase without altering the substance, while chemical changes result in new substances with different properties. Examples include the ripening of fruit, cooking, and rust formation.

1. Changes in Matter
Science Grade 4

2. Many changes in matter happens
everyday.
Like green papaya fruit turns yellow
and sweet after several weeks.
Big woody trees are made into
chairs, tables, and cabinets.
These are all useful changes.
However, some changes are
also harmful.

3. Physical Change
When a material change only in size, shape
and form, the material undergoes physical
change.
A burnt bread is dark and bitter. It is different
from the original bread.It resulted in a new
material. Such change is called chemical change.

4. Crumpled paper
Burned paper

5. 1. Physical Change
1. Change in size and shape
2. Change in phase
a. melting
-is changing a solid into a liquid.

6. b. evaporation
c. condensation
d. freezing
-is the process of changing liquid
into gas.
-is changing a gas into a liquid.
-is changing liquid to solid.

7. e. sublimation
f. deposition
-is changing a solid directly to gas
without passing through a liquid state.
-is changing a gas directly to
solid particles.

8. What are the types of physical
change?
Change in size and shape
melting
freezing
deposition
evaporation
sublimation
condensation

9. Let’s try to answer activity on
your MDLB book page 221.
(10minutes)

10. 2. Chemical Change
-occurs when a new substance
with properties different from the
original substance is formed.
Unripe to ripe fruits

11. cooking
When objects burned

12. Rusting nails
Rust is the common name of the
chemical called iron oxide. ... Rust
forms when iron or its alloys are
exposed to moist air. The oxygen and
water in air react with the metal to
form the hydrated oxide. The familiar
red form of rust

13. Release of gas

14. What is chemical change
different from physical
change?

15. Activity #2
MDLB page 228 Letter B.