1. Explain the exotic species?
2. Determine the two ways humans affect the nitrogen cycle and in turn affect the ecosystem
3. Two science students set out to prove the Law of Conservation of Mass. they calculate that the mass of all the products in a chemical reaction will be equal to the mass of all the reactants. They chose to react sodium bicarbonate and hydrochloric acid. However, the results seemed to "disprove" the Law of Conversation of Mass. Give possible reasons why the student's prediction was wrong and explain what they should do to make the experiment work.