Sawdust is not a change. Making solid wood into sawdust by sawing it, would be a physical change.
No, it is a chemical change.
No. Antacids neutralize the hydrochloric acid in the stomach. It is a chemical change.
This change is a physical change because the matter is made up of the same components that it consisted of before it was broken. An example of a chemical change is the molecular rearrangement of matter like rust on a car.
Taking an antacid is an example of a chemical reaction known as a neutralization reaction. In this reaction, the antacid reacts with stomach acid to form water and a salt, which helps to reduce acidity in the stomach.
It is a chemical change, even though the cigarette is getting physically smaller. When heat is added and you inhale the chemicals, the cigarette burns and you blow out smoke which in itself is a chemical reaction that cannot be reversed. Therefore, it's purely chemical. Remember that chemical changes cannot be reversed and physical changes can. Freezing water and then melting it is an example of a physical change. The example you mentioned is a chemical change. Hope this helps! - D.F
Saw dust
sawdust pilling under the table.
A physical change is melting.A chemical change is combustion.
Boiling is a physical change, not chemical.
Vaporization is a physical change, not chemical.
Chemical change.
Rusting is the oxidation of a metal and is an example of a chemical change.