Why should scientists perform expierements

Why does a cake rise when you bake it? ♡

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.