2. Physical and Chemical Changes A Write On Activity

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

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

5. 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, odor, volume, mass, weight, and density.

6. Physical Change

7. Chemical Change  Chemical changes are changes matter undergoes when it becomes new or different matter.  To identify a chemical change look for 3 signs (Power of 3).

8. Signs of a Chemical Change  color change  bubbling and fizzing (gas)  light production  smoke, and presence of heat  rusting  change in mass  odor  decomposing  digestion

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

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

12. Correct!

13. Is it a chemical or physical change?  Logs burning Chemical Change Physical Change

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

15. Correct!

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

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

18. Correct!

19. Is it a chemical or physical change?  Cutting paper 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. Is it a chemical or physical change?  Crushing an aspirin 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. Is it a chemical or physical change?  Metal rusting 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. Is it a chemical or physical change?  Lighter fluid burining 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. Is it a chemical or physical change?  An egg rotting 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. Is it a chemical or physical change?  An egg breaking 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. Writing Activity  Write a paragraph about the difference between a chemical and physical change. Give examples of each.