Physical Changes:
1. Boiling water: I observed that when I boiled the water it evaporated. It can go back to being normal water by the water cycle.
2. Melting ice: I saw that when the ice malted it looked and felt different. It can go back to being ice by pitting it into the freezer.
3. Breaking Glass: When I dropped the glass I observed that the glass shattered on the floor and the shape looked different. The glass can be put back together by putting glue on it.
Chemical Changes:
1. Mixing two different colors to create a new color: When I mixed two colors together, a new color was created. The color was different then it was before. I could not put it back to its original color.
2. A Rusting Bicycle: When the bicycle rusted it felt and looked different. I cannot return the original color which made it a chemical change.
3. Burning toast: When I was burning my toast I saw that it felt harder and the color had changed. Since I could not melt it or do anything to return it to its original color it is a chemical change
Adib Saeed
One of your chemical changes was mixing colors, if you are referring to mixing paint, then it depends on the type of paint.
ReplyDeleteFirst of all changing color is considered a physical change because the composition of the paint is the same no matter what you change it too.
But some times the pigments in the paints react making it a chemical change, so you cannot say for sure that it is a chemical change.
All your other physical and chemical changes are great though. :)