1. Chemical and Physical Properties and Changes

2. Matter Matter is everywhere.
Matter is anything that takes up space and has mass.
Matter is constantly experiencing both chemical and physical changes.

3. Physical Properties and Changes
Physical Properties are used to observe or describe matter.
How do you observe or describe someone?
Height
Hair Color
Eye Color
Weight
Age
Clothing Color
Let’s describe
Dwight Schrute

4. Physical Properties and Changes
When we observe or describe something or someone we use “drivers license” descriptions.
When we observe or describe MATTER we use some of the same descriptions.

5. List as many physical properties as you can…

6. Physical Properties and Changes
Things you observe and can describe about matter:
Color
Size
Smell
Freezing Point
Melting Point
Mass
Shape
Volume
Density

7. Physical Change
Physical changes occur when matter changes its property but not its chemical nature.
Physical property changes could include a change in: texture, shape, size, color, volume, mass, weight, and density.

8. Physical Properties and Changes
Do NOT change the structure of matter when they are observed or described.
What does “structure” mean?
How the atoms are stuck together!
Each letter is a different atom, and the lines that connect the letters show the STRUCTURE of the substance.
And here each color represents a different atom and this picture shows the STRUCTURE of the substance.

9. Physical Properties and Changes
What is the “structure” of water?
What is the “structure” of ice?
What is the “structure” of steam?

10. Physical Properties and Changes
We just observed one of the physical properties of H2O!
PHASE CHANGE
We observed how H2O is different in each phase, but the structure of H2O never changed!

11. The difference between Physical Property and Physical change.
The physical property is something that we can measure with out changing the identity of the matter. That includes the materials ability to change but not change what it is
The physical change is the actual process of changing.
Remember that no new substance it formed!

12. Physical Properties and Changes
When a physical property (like the phase of water) is altered we called it a PHYSICAL CHANGE
In other words: A physical change involves a change in physical properties (shape, size, density, etc.)
It takes a physical change to change water to steam, or ice to liquid.
What are some other examples of physical changes?

13. Physical Properties and Changes
Shape
The shape of the wood changed. But is it still a piece of wood?

14. Physical Properties and Changes
Size

15. Physical Properties and Changes
Color
The tip of the nail changed color. But is it still a fingernail?

16. Physical Properties and Changes
Melting Point
The ice cream melted. But does it still taste like ice cream?

17. Physical Properties and Changes
You can think of Physical Changes like changing the font of a word…
Mrs. Hall
The “structure” of the words is still the same, even though the physical appearance changed.

18. Chemical Change
Chemical changes are changes matter undergoes when it becomes new or different matter.
To identify a chemical change look for signs such as color change, bubbling and fizzing, light production, smoke, odor, and presence of heat.

19. Chemical Properties and Changes
And you can think of Chemical Changes like rearranging the letters of the words…
Mrs. Coates
Most Acres
Cream Toss
Re: Mascots
Me Toss Car
Cares Most

20. Chemical Properties and Changes
The letters are the same, but we’ve rearranged the structure and made new words! This is what happens in a chemical change! Chemical properties lead the way for chemical change

21. Chemical Properties and Changes
What are some examples of Chemical Properties?
Flammability
Oxidation
Toxicity
Radioactivity
Sensitivity to Light
Reactivity with water

22. Chemical Properties and Changes
Flammability:
The ability to catch fire!

23. Chemical Properties and Changes
Oxidation
The ability to react with Oxygen

24. Chemical Properties and Changes
Toxicity
The ability to be poisonous

25. Chemical Properties and Changes
Sensitivity to Light
The ability to change when exposed to light

26. Chemical Properties and Changes
Reactivity with water
Some elements react explosively with water!
Sodium, Potassium, Lithium, and Calcium

27. Chemical Change
A chemical change occurs when fireworks are used. Fireworks are made of metals such as magnesium and copper. These change chemically as they light up the sky.

28. Examples of Chemical changes
Soured milk
Alka seltzer
Statue of liberty
Space shuttle launch

29. Chemistry & Matter
We can explore the MACROSCOPIC world — what we can see —
to understand the PARTICULATE worlds we cannot see.

30. Kinetic Nature of Matter
Matter consists of atoms and molecules in ____.

31. The In-Betweens: Physical or chemical?
Some properties (abilities) can be either physical or chemical
Examples:
Ability to change color
Ability to make a gas

32. Both of these examples are making a gas
Both of these examples are making a gas. Which one is physical and which is chemical?

33. Both of these pictures show a color change due to heat: which is physical and which is chemical?

34. Lets Take the QUIZ…

35. 1. Is it a chemical or physical change?
Sugar dissolving in tea
Chemical Change
Physical Change

36. OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?

37. Correct!

38. 2. Is it a chemical or physical change?
Logs burning
Chemical Change
Physical Change

39. OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?

40. Correct!

41. 3.Is it a chemical or physical change?
Breaking water up by separating it into hydrogen and oxygen
Chemical Change
Physical Change

42. OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?

43. Correct!

44. 4.Is it a chemical or physical change?
Cutting paper
Chemical Change
Physical Change

45. OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?

46. Correct!

47. 5.Is it a chemical or physical change?
Crushing an aspirin
Chemical Change
Physical Change

48. OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?

49. Correct!

50. 6. Is it a chemical or physical change?
Metal rusting
Chemical Change
Physical Change

51. OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?

52. Correct!

53. 7.Is it a chemical or physical change?
Lighter fluid burning
Chemical Change
Physical Change

54. OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?

55. Correct!

56. 8.Is it a chemical or physical change?
An egg rotting
Chemical Change
Physical Change

57. OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?

58. Correct!

59. 9. Is it a chemical or physical change?
An egg breaking
Chemical Change
Physical Change

60. OOPS! Did it change size, color, shape (Physical Change)? or
Did it become different matter (Chemical Change)?

61. Correct!

62. Writing Activity
Write a paragraph about the difference between a chemical and physical change. Give examples of each.