One could be the lighting of a firefly, because there is a chemical reaction that happens inside of the firefly that makes it glow, and another could be making food, because you have to add baking soda in some foods, and it reacts with other ingredients. Hope that helps.
Just you know what that is but if I’m clearly about that question then I don’t know what to tell you and beside I don’t know the answer too
Answer:
I'm guessing you mean to the nearest thousand, soo the answer would be 8,000.
Hope this helps!
