By explosion, you mean combustion I presume. Because combustion is a type of reaction, explosions are chemical changes.
Well a chemical change cannot be reversed while a physical change can be, what do you think??
An explosion is an example of a chemical change because the arrangement of the atoms has been altered.
Dissolving is a physical process.
This is a chemical property.
Heating water to make it hot is a physical change, as the water's chemical composition remains the same. The change in temperature simply affects the kinetic energy of the water molecules, causing them to move faster and appear hot.
Answer A, "explosive breaks rocks" is a chemical change, releasing energy by the oxidation (combustion, ignition) of an explosive chemical. All of the others are physical or phase changes that do not chemically alter the molecules of the substances.
no
no
Crumple is a physical change.
Physical
a change in size, shape or the state of matter is a physical change. True for A+.
physical change