BC: Wood Burning | This is a Chemical Change because it has changed color, and has an odor. Also the wood has burned away and created a new substance, "Ash".
FC: Ethan Holcombe's Digital Portfolio Physical and Chemical Changes | 5th Period
1: Physical Changes-a change from one state to another without a change in chemical composition | This is a Physical Change because it is still paper, and it has not changed to a new substance. | Paper Crumbling
2: Crackers Breaking | This is a Physical Change because it is still a cracker just broken up into smaller pieces and it also did not create a new substance.
3: Chocolate Melting | This is a Physical Change because it is still chocolate. It has not formed a new substance because if you freeze the melted chocolate you would get the original solid chocolate.
4: Chemical Changes-a change in composition and characteristics of matter. A new substance may be formed | A Nail Rusting | This is a Chemical Change because this nail has formed a new substance, "Rust". It also has changed color which is a Chemical Property.
5: Green Tablet Dissolving | This is a Chemical change because when I put the Green Tablet into the water it started to dissolve and it turned the water green. That proves a Chemical Change because it formed a new substance and it changed color.