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No, freezing water is not a chemical reaction. It is a physical change which water undergoes at temperatures below 0oC. At higher temperature the ice melts back to water again.
A chemical reaction. You can tell because the smell of the apple changes. There are many other ways of telling if it is a chemical change. They are listed below: Temperature change Smell change Colour change If it is burning if gas is produced If it's state changes(from liquid to gas or solid etc.)
The formation of steam is a physical change. The chemical composition of steam (water vapor), is H2O, and the chemical composition of liquid water is H2O, so there is no chemical change going from liquid to gas (vapor/steam). Thus, it is a physical change.
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No, freezing water is not a chemical reaction. It is a physical change which water undergoes at temperatures below 0oC. At higher temperature the ice melts back to water again.
Dissolution is a chemical change. See the link below.
It is a chemical change. Look at the explanation below the picture of the rusting nail. With toast a new substance has been formed due to the heat which caused the chemical change.
Yes, fire can change lots of different colors please refer to the web site I have listed below.
It is a physical change, known as a phase transition (see related links below).There is no chemical change: the water molecules remain water molecules. They have simply acquired enough kinetic energy to escape the attraction of the molecules in the liquid and move (almost) freely.
The numbers can sometimes change, but they are listed in the Hall of Fame. See the related link below.
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A chemical reaction. You can tell because the smell of the apple changes. There are many other ways of telling if it is a chemical change. They are listed below: Temperature change Smell change Colour change If it is burning if gas is produced If it's state changes(from liquid to gas or solid etc.)
how many cities listed below