Aluminum can react with oxygen gas to produce aluminum oxide, what time of reaction is this?

Which statement is a reason to support population regulation? a) it is unethical for us to control birth control rates b) humans have the freedom to produce as many children as desired c) the gap between the rich and poor has been narrowing since 1960 d) billions more people on the earth will intensify many environmental and social problems

Modern weaponry has increased the number of deaths in wars and violent conflicts.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?