1. Physical and Chemical Changes
A Write On Activity
Free powerpoints at

2. Objective: Chemical/Physical Change: Differentiate
The learner will be able to distinguish between a physical and chemical change.

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

4. The difference between Physical Property and Physical change.
The physical property is the material’s ability to change what it looks like but not change what it is
The physical change is the actual process of changing shapes.

5. Physical Change vs. Property
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, odor, volume, mass, weight, and density.

6. Examples of physical changes
Crushing an aluminum can
Melting
Dissolving sugar in water
Bending a paper clip
Freezing water for ice cubes
Mixing oil and vinegar
Cutting your hair
Sanding a piece of wood

7. Physical Change

8. 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, and presence of heat.

9. 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.

10. Examples of Chemical changes
Soured milk
Alka seltzer
Statue of liberty being eroded by acid rain
Space shuttle launch

11. Chemistry & Matter
We can explore the MACROSCOPIC world — what we can see —
to understand the PARTICULATE worlds we cannot see.
We write SYMBOLS to describe these worlds.

12. Kinetic Nature of Matter
Matter consists of atoms and molecules in MOTION.
Dense/Slow
Less Dense/Faster
Least Dense/Fastest

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

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

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

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

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

18. Correct!

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

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

21. Correct!

22. 3.Is it a chemical or physical change?
Melting an ice cube to become water.
Chemical Change
Physical Change

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

24. Correct!

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

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

27. Correct!

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

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

30. Correct!

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

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

33. Correct!

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

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

36. Correct!

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

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

39. Correct!

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

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

42. Correct!

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