<Ul> <Li> Change of odor . </Li> <Li> Change of color ( for example , silver to reddish - brown when iron rusts ) . </Li> <Li> Change in temperature or energy , such as the production ( exothermic ) or loss ( endothermic ) of heat . </Li> <Li> Change of composition - paper turning to ash when burned . </Li> <Li> Light and / or heat given off . </Li> <Li> Formation of gases , often appearing as bubbles in liquids . </Li> <Li> Formation of a precipitate ( insoluble particles ) . </Li> <Li> The decomposition of organic matter ( for example , rotting food ) . </Li> <Li> The change is difficult or impossible to reverse . </Li> </Ul>
<Ul> <Li> Change of odor . </Li> <Li> Change of color ( for example , silver to reddish - brown when iron rusts ) . </Li> <Li> Change in temperature or energy , such as the production ( exothermic ) or loss ( endothermic ) of heat . </Li> <Li> Change of composition - paper turning to ash when burned . </Li> <Li> Light and / or heat given off . </Li> <Li> Formation of gases , often appearing as bubbles in liquids . </Li> <Li> Formation of a precipitate ( insoluble particles ) . </Li> <Li> The decomposition of organic matter ( for example , rotting food ) . </Li> <Li> The change is difficult or impossible to reverse . </Li> </Ul>
list three types of evidence that indicate a chemical reaction
list three types of evidence that indicate a chemical reaction
Change of odor Change of color Change in temperature or energy
Change of odor Change of color Change in temperature or energy