Why are all organs are in the alimentary canal important in digesting food

Compare and contrast physical changes with chemical changes.

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.

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %