During a chemical change, you may observe any or all of the following:
1. Color change.
2. Temperature change, either hotter or cooler.
3. Bubbles or "fizzing," which signals the production of a gas.
4. A smell that wasn't there before.
5. The production of a precipitate, which is a solid coming out a liquid solution.
The production of smoke from something burning would be a sign of a chemical change. Broken pieces, change in shape, or change in state are all physical changes.
Not really. A broken glass is still glass; no chemical change has occurred. But it is physically different, so it is better to say a physical change happened.
Physical.
It is physical. The tooth is broken into smaller pieces, but the pieces are still made of the same substances.
physical
The production of smoke from something burning would be a sign of a chemical change. Broken pieces, change in shape, or change in state are all physical changes.
A physical change in an ice cube can be suggested by observing a change in its shape, size, or phase. For example, if an ice cube melts into water or is crushed into smaller pieces, it indicates a physical change has occurred.
Not really. A broken glass is still glass; no chemical change has occurred. But it is physically different, so it is better to say a physical change happened.
Breaking coal into pieces is a physical change because it does not alter the chemical composition of the coal. The coal remains composed of the same elements before and after being broken into pieces.
Physical.
Physical.
It encountered a physical change.
no... its a physical change
It is a physical phenomenon.
False. Changing the size and shape of pieces of wood is a physical change, not a chemical change. A chemical change involves the alteration of the chemical composition of a substance, while a physical change only affects the physical properties of a substance.
it is a chemical change.
That change would be physical, since the chemical identity of the wood has not been altered by cutting it.