Broccoli, like all plants, has chlorophyll, making it green. You can really “see” the chlorophyll when you boil broccoli. This is such a simple experiment that you can do this as you prepare dinner tonight with your kids. Make sure you have an extra head of broccoli for this experiment, unless you really like to eat overcooked broccoli.
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Good question! I updated the explanation above. The color change is caused by natural acids in the broccoli.
Hi Aurora, why does acid enter the broccoli and from where?