This question is about reactions of metals. Figure 1shows what happens when calcium, copper, magnesium and zinc are added to hydrochloric acid. Figure 101.1What is the order of decreasing reactivity of these four metals?[1 mark]Tick()onebox. Zn Ca Cu MgCa Cu Mg ZnCu Zn Ca MgCa Mg Zn Cu

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.