The document discusses reversible and irreversible changes, noting that a reversible change can go forward or backward while an irreversible change cannot. It defines physical changes as altering the form of matter without changing its type, and can be reversible or irreversible. Chemical changes form new substances and are always irreversible. Examples are provided of changes that are reversible, such as folding paper or melting butter, and irreversible, such as burning wood or rusting iron.

1. Reversible and Irreversible
change

2. Reversible change
A change that can go forward
or backward

3. Irreversible change
A change that cannot go
backward

4. Physical change
Alters the form of an object
without changing what type of
matter it is
I can be reversible or
irreversible

5. Chemical change
Is any change that results in he
formation of a new chemical
substance
It is irreversible

6. physical change

7. physical change

8. physical change

9. chemical change

10. Chemical change

11. chemical change

12. Is it reversible or irreversible change ?
Folded paper
reversible

13. Is it reversible or irreversible change ?
Blowing a balloon
reversible

14. Is it reversible or irreversible change ?
Burning wood
irreversible

15. Is it reversible or irreversible change ?
Iron rust
irreversible

16. Is it reversible or irreversible change ?
Melting butter
reversible

17. Is it reversible or irreversible change ?
Burning match stick
irreversible

18. Is it reversible or irreversible change ?
Toasting bread
irreversible

19. Is it reversible or irreversible change ?
Freezing orange juice
reversible

20. Is it reversible or irreversible change ?
Dissolving salt in water
reversible

21. Is it reversible or irreversible change ?
Melting wax
Burning thread irreversible
reversible

22. Is it reversible or irreversible change ?
Ice turning into water
reversible

23. Is it reversible or irreversible change ?
Sharpening a pencil
irreversible