CLASSROOM OBSERVATION 1ST QUARTER SCIENCE 8 BULIHAN INTEGRATED NATIONAL HIGH SCHOOL

CLASSROOM OBSERVATION

2. Prayer

4. ATTENDANCE

5. LEARNING OBJECTIVES
Describe the characteristics
of physical and chemical
characteristics of matter.
Identify substances using
physical and chemical
properties

6. LEARNING OBJECTIVES
compare and contrast
physical and chemical
property
Enumerate the particle
theory of matter.

7. MOST ESSENTIAL LEARNING
COMPETENCIES
Explain the properties of
solids, liquids, and gases
based on the particle
nature of matter;

8. PRE-TEST (WHAT I NEED TO
KNOW?)
We will do the PRE-TEST in
Quizzes.com. Wait for the
link to be send in Google
Meet Chat Box.

9. Are you ready to learn?
WHAT’S NEW?

10. Let us watch the video…

11. GUIDE QUESTIONS
What are the 3 states of Matter?
Describe what are solids
Describe What are liquids
Describe what are gases

12. PARTICLE MODEL OF MATTER (
OBSERVE THE PICTURE)

13. LEARNING TASK 1 –RECORD
YOUR OBSERVATION
SOLID LIQUID GAS

16. ACTIVITY
How would you describe yourself
so that someone else could identify
you?
On a separate sheet of paper, write as many
physical descriptions of yourself as you can.
Do not put your name on the paper.

17. VOCABULARY
What is Property?
Thecharacteristicsthat
enable us to distinguish
one substance from
another are
calledproperties.

19. Physical Properties
A property of matter that can be observed or
measured without changing the identity of the
matter.
Physical properties identify matter.
Examples are:
Density
Malleability
Ductility
Solubility
State
Thermal Conductivity

20. Physical Properties
Density
Amount of mass in a given volume
Any substance is always the same at a given
pressure and temperature regardless of the size
of the sample of the substance.
The density of one substance is usually different
from that of another substance.
Density equals mass divided by volume.
D = m / v

21. ANALYSIS
If a nail and a toothpick are
simultaneously dropped from the
same height. What object will
reach the floor first?

22. ACCORDING TO GALILEO
Any substance is always the same
at a given pressure and
temperature regardless of the
size of the sample of the
substance.

23. LET US WATCH THE GALILEO
EXPERIMENT ABOUT FREE FALL.

24. Practice Problems
MATHEMATICAL ABILITY
A bar of copper has a mass of 216 Kg and a volume of 24 cmᴲ.
What is the density of copper?
The volume of a candy bar is 55 cmᴲ. The mass of the candy bar is 70
Kg. What s the density of the candy bar?

25. LET US CHECK
m= 216Kg
v= 24 cm
3
d= ?
Formula –d= m/v
d= (216Kg x 24cm
3
)
Answer = 5184 Kg/cm
3

26. LET US CHECK
m= 70Kg
v= 55 cm
3
d= ?
Formula –d= m/v
d= (216g x 24 cm
3
)
Answer = 3850 Kg/ cm
3

27. Physical Property
Malleability
The ability to be hammered into thin sheets.
Example:
Aluminum can be rolled or pounded into sheets to
make foil.
Ductility
The ability to be drawn into a wire
Example
Copper in wiring –soldering wires or joints

28. Physical Property
Solubility
The ability to dissolve in another
substance.
Example:
Sugar or salt dissolve in water
Three ways to increase solubility
Heat or make warmer
Grind or smash
Stir or mix

29. Physical Property
State of Matter
The physical form in which a substance
exists at room temperature, such as:
Solid –matter has a definite shape and
volume
Liquid–matter takes the shape of its
container and has a definite volume
Gas–matter changes in both shape and
volume

30. Physical Property
Thermal Conductivity
The ability to transfer thermal energy
from one area to another.
Examples:
Plastic foam is a poor conductor, so a hot
drink won’t burn your hand.
The inside of the toaster (hot coils)

31. Chemical Property
A property of matter that describes a substance based on its ability to
change into a new substance with different properties.
Combustibility
Flammability
Reactivity
Acids
Bases
Oxidation

32. Chemical Properties
Can be observed with your senses.
Are Not as easy to observe as physical
properties
Example:
Flammability–Only when wood burns
Combustibility–Only when fireworks
explode
Reactivity–Only when iron Oxidizes
(rust)

33. Physical Change
A change that affects one or more physical properties of a substance.
Do Not form new substances.
Can often be Undone
Example Butter on counter can be placed back in refrigerator.
Change of State
Solid to Liquid
Liquid to Gas

34. Chemical Change
A change that occurs when one or more
substances are changed into entirely new
substances with different properties.
Can Not change back under normal
conditions (some can be changed back by
other chemical means)
Common Examples:
Reactivity –Oxidation (rust) on a bicycle
pH (Acid / Base) –Effervescent tablets
Flammability –Burnt wood
Combustibility -Fireworks

35. 5 Signs of a Chemical Change
The only sure way to know there
has been a chemical change is
the observance of a new
substance formed
Sometimes that is hard to do, so
look for the signs…….

36. Sign 1 a Chemical Change
Odor Production-this is an odor far different
from what it should smell like
Ex: Rotting eggs, food in fridge, decomposing
flesh

37. 2
nd
Sign of a Chemical Change
Change in Temperature
Exothermic-When energy is released do
during the chemical change ex: wood burning

38. Change in Temperature
Endothermic-Energy is absorbed causing a decrease
in temperature of the reactant material ex: cold pack
in first aid kit

39. 3
rd
Sign of a Chemical Change
Change in Color
Ex: fruit changing color when it ripens,
leaves changing color in the Autumn,
dying your hair

40. 4
th
sign of a Chemical Change
Formation of Bubbles
This can indicate the presence of a gas.
Bubbles produced when boiling water is
not a chemical change.

41. 5
th
Sign of a Chemical Change
Formation of a Precipitate
When two liquids are combined
and a solid is produced

42. ENGAGEMENT
IDENTIFY THE FOLLOWING
PICTURE IF IT IS
PHYSICAL PROPERTY OR
CHEMICAL PROPERY

43. BURNING OF WOOD

44. 400 GRAMS SUGAR

45. GOLD HAMMERED INTO THIN
SHEETS

46. RED BAG

47. RUSTING OF METAL

48. ASSIMILATION

49. FACT OR BLUFF
ANY FRUIT WHEN IT
RIPENS IS AN EXAMPLE
OF PHYSICAL PROPERTY
OF MATTER

50. FACT OR BLUFF
Solids-closely packed
and organized
molecules/atoms with a
stable, definite shape
and volume

51. FACT OR BLUFF
CHEMICAL PROPERY
A property of matter that can
be observed or measured
without changing the identity
of the matter.

52. FACT OR BLUFF
Thermal Conductivity
The ability to transfer
thermal energy from one
area to another.

53. FACT OR BLUFF
PHYSICAL CHANGE
A change that affects one
or more physical
properties of a substance.

54. FACT OR BLUFF
Ductility
The ability to be drawn
into a wire

55. QUIZ
QUIZZES.COM

56. VALUING

57. REFLECTION
Please complete the sentence and send your answers in our chat
box.
I Understand
that________________________________________________________________
__________________________________.
I realized that
____________________________________________________________________
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