Physical change
Chemical changes
Physical
Chemical
The browning of a flower is a chemical change. Color changes are one sign of a chemical reaction.
At first it is a physical reaction. If you keep heating it it will undergo a chemical change. In fact, once it melts you have altered its chemical makeup (melting by itself is a physical change but in sugar that also marks a chemical change). Heat more and it undergoes another chemical change and goes from clear to brown another chemical change takes places. Eventually you can drive off (almost) all but the carbon atoms.http://answers.yahoo.com/question/index?qid=20080906171221AAcGFPs
An apple turning brown is a CHEMICAL change.
Depends on the temperature! If it gets brown, yes.
it is a chemical change
It is a chemical change - oxidisation.
Physical
Chemical
The browning of a flower is a chemical change. Color changes are one sign of a chemical reaction.
A chemical change. Color change is a good indicator of a chemical change.
At first it is a physical reaction. If you keep heating it it will undergo a chemical change. In fact, once it melts you have altered its chemical makeup (melting by itself is a physical change but in sugar that also marks a chemical change). Heat more and it undergoes another chemical change and goes from clear to brown another chemical change takes places. Eventually you can drive off (almost) all but the carbon atoms.http://answers.yahoo.com/question/index?qid=20080906171221AAcGFPs
An apple turning brown is a CHEMICAL change.
It is a chemical change because cut apples turn brown through the process of oxidation.
yes
because heat has been used and the waffle has changed color from light brown to dark brown