Physical or Chemical Reaction?

Physical or Chemical?

You be the judge!

1) Ice Melting

2) Wood Burning

3) Bending a Spoon

4) Chocolate Melting

5) A Lit Sparkler

6) Baking Bread

7) Clothes Drying

8) Digestion

9) Shaping Playdoh

10) A Penny Reacting

11) Photosynthesis

12) Crinkling Paper

13) Combining These Two Liquids

14) A Pipe Corroding

15) Making a Paper Plane

16) Sugar Dissolving in Water

17) Baking Soda Combined with Vinegar

18) Cutting Paper

19) Making Ice

20) A Thermometer