Question

write some characteristics of chemical change

Answer 1

change in our
change in colour
change in temperature

Answer 2

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In order to know if it is a chemical or physical change, you need to know the following characteristics. With these characteristics it is easier to know what kind of change took place. 
There is a change in color
There is a change in temperature: you can tell when the temperature is changing because when a chemical reaction is happening and bubbles start showing up. 
There is a change in the smell when two substances are mixed and a chemical reaction has occurred. 
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