BC: Digesting food is a chemical change because the composition of the food is being changed by the acids in your stomach can't be changed back.
FC: Physical and Chemical Changes Morgan Winkelmann 7th Period- Hebert
1: Physical Changes
2: A towel absorbing water is a physical change because the water is not changing the towel into anything different.
3: Inflating a balloon is a physical change because all it's doing is adding air to the inside of the balloon, no change in substance is occurring.
4: Ripping tin foil is a physical change because you are only changing its shape, not its content.
5: Melted ice is a physical changed because even though it's changing into a different form it's still water.
6: Crumbled paper is a physical change because the paper is still paper it's just not smooth anymore.
7: Broken plastic is a physical change because even though the glass is broken it's still glass, no content was changed.
8: Chemical Changes
9: Photosynthesis is a chemical change because it changes carbon dioxide and water into glucose and oxygen, which means the content, was changed.
10: Rusted metal is a chemical change because it's altering the metals composition.
11: Rotting fruit is a chemical change because once the fruit is rotten you can't change it back to the original substance.
12: Burning wood is a chemical change because as the wood is burning the composition is changing.
13: Fireworks are a chemical change because when the fireworks explodes it's a new substance.