chemical and physical changes

1. ( Physical change )
Reversible change

2. ( chemical change )
Irreversible change

3. Evidence of irreversible change
1) Changein colour
Iron rusting Silver tarnish

4. Evidence of irreversible change
2) Changein scent ( smell )
Toasting
marshmallow

5. Evidence of irreversible change
3) Presenceof bubblesor fizzing
Antacid tablets

6. Evidence of irreversible change
3) Presenceof bubblesor fizzing
vinegar
+
Carbon dioxideBaking soda

7. Evidence of irreversible change
4) Heat isreleased or absorbed
Fire gives off heat and light

8. Evidence of irreversible change
1) Changein colour
2) Changein scent
3) Presenceof bubbles
4) Heat isreleased or absorbed