Science Lessons for Grade 7

2. MATTER
Science Teacher: T. Jen

3. What is MATTER?
Matter is any living or non-living
things in the universe
All objects, things, plants, people,
animals, etc are made up of matter.

4. What are the matters?

5. OBJECTIVES
• Describe what matter is made up of
• Distinguish between the physical properties
and chemical properties of matter
• Classify changes of matter as physical or
chemical.
• Cite the importance of matter in our daily life

6. Matter
• Matter has mass and
volume.

7. Mass:
•the amount of matter in an object
•measured with a balance

9. Volume:
•the amount of space an object
takes up
•measured with a ruler or graduated
cylinder

10. Matter
• Matter is composed of
tiny particles called atoms.

11. Atoms
• Atoms are the basic
building blocks of
ordinary matter.

12. PARTS OF ATOM

13. • Molecules is a large
particle formed by the
combination of two or
more atoms by
chemical bonds

14. What matter can you observe in this
picture?

15. What matter can you observe in this
picture?

16. PROPERTIES OF
MATTER

18. Physical Properties
• are those that can be observed and measured
without changing the substance into another
substance.
• changes in the size or shape of matter.
• Changes of state—for example, from solid to
liquid or from liquid to gas.

20. Physical Properties
• Some of the processes that cause physical
changes include cutting, bending,
dissolving, freezing, boiling, and melting.

22. Examples include
1. Boiling point
2. Melting point
3. Malleability and Ductility

23. 1. Boiling Point
- Is the temperature at which a
liquid starts changing into gaseous
phase.

24. 2. Melting Point
- Is the temperature at which
solid begins to melt.

25. 3. Metallic properties
Malleability is the capacity of a
material to be hammered into thin
sheets.
Ductility is the ability of a material
to be drawn into wires.

26. Physical Properties

27. Physical Changes terms to
consider…

Boil, melt, cut, break, split, grind, crush,
bend, condense, freeze, dissolve and
crack are examples of physical changes.
,

28. Chemical Properties
• Are properties that can only be
identified when one substance reacts
with another substance.
• Ability of a substance to undergo a
chemical reaction C + O2
(reactants)
CO2
(product)

29. If you cut an apple, the flesh of apples turn brown
due to oxidation.

30. Chemical Properties
Characteristics:
1.Change in odor
2.Change in color
3.Change in form
4.Change in temperature or energy
5.Form gas
6.Give off light and heat
7.Form precipitate

31. • Example include:
–Charcoal burning in air
– iron rust
–Decomposition of wood
Chemical Properties

32. CHEMICAL PROPERTIES
•Consider terms
such as:
–burn
–rot
–rust
–decompose
–ferment
–explode
–oxidize
–corrode
–grow
–precipitate
–gas formation
–digest

33. Give an example of:
Physical Change?
Chemical Change?

34. Identify Me!

35. Physical or Chemical Change?

36. Physical or Chemical Change?

37. Physical or Chemical Change?

38. Physical or Chemical Change?

39. Physical or Chemical Change?

40. Physical or Chemical Change?

41. Physical or Chemical Change?

42. Physical or Chemical Change?

43. Physical or Chemical Change?

44. Physical or Chemical Change?

45. Physical or Chemical Change?

46. Physical or Chemical Change?

47. Physical or Chemical Change?

48. Physical or Chemical Change?

49. Rusting

50. Rusting is a chemical
change.

51. Melting

52. Melting is a physical
change.

53. Freezing

54. Freezing is a physical
change.

55. Burning

56. Burning is a chemical
change.

57. Cutting paper

58. Cutting paper is a physical
change.

59. Rotting

60. Rotting is a chemical
change.

61. Let’s have a review!

62. Any questions?

63. GOD BLESS!!!!!!