A new substance is produced.
Bubbles are given off (fizzing), which shows that a gas has been produced.
Color changes.
Turbidity (cloudiness)
heat/light given off.
A sound is produced/an explosion occurs
etc
If you mean a change in chemical identity, that would be a chemical change.
It is a physical change because while the apple is cut into smaller pieces, it is still composed of the same materials. If you lit the apple on fire, that would result in a chemical change.
A. Burning. Burning a plastic soda bottle would involve a chemical change because the plastic molecules are being broken down and rearranged into different chemical substances. Freezing, cutting, and crushing would not result in a chemical change, as the chemical composition of the plastic would remain the same.
Frying an egg is a chemical change.
It would be a chemical change, because if it was a physical change it would stay the same substance, but in a chemical change you mix 2 different substances to get a new substance.
reaction, chemical process, chemical change, chemical action
This is a physical change, not a chemical change! It is because all the wax is still all there as for if it was a chemical change it would be all gone!Physical. Its physical state changed from solid to liquid. It's chemical make up remains the same.Melting wax is a chemical change because a new substance is forming. Trust me im intelligent and we just learned this in science.physical change :)It is a chemical change because it gives off heat even when it is burning. heat is one of the signs that tell whether it is physical or chemical change. The signs are heat , light's ,gas,discolor.Melting was would be a physical change-- no chemical reaction occurs when something melts or boils. A burning candle is a chemical change, both can occur at the same time.
The temperature increase from 90 to 100 degrees for heptane would not cause a chemical change. It would only result in a physical change, such as a phase change from liquid to gas.
A change in the rate of enzyme action in aquatic invertebrates would most directly result from a change in temperature, pH, or substrate availability in their environment. These factors can influence the activity and efficiency of enzymes in these organisms.
Mixing Epsom salt and ammonia would result in a physical change. It is considered physical because no new substances are formed during the mixing process.
Mixing salt water and silver nitrate would result in a chemical change, as a reaction would occur between the compounds to form a precipitate of silver chloride. This new substance has different chemical properties than the original reactants.
chemical change
If you mean a change in chemical identity, that would be a chemical change.
It is a physical change because while the apple is cut into smaller pieces, it is still composed of the same materials. If you lit the apple on fire, that would result in a chemical change.
A. Burning. Burning a plastic soda bottle would involve a chemical change because the plastic molecules are being broken down and rearranged into different chemical substances. Freezing, cutting, and crushing would not result in a chemical change, as the chemical composition of the plastic would remain the same.
No, corrosion is a chemical change of the metal involved.
That would be a chemical change.