(2) Plants and animals would die or suffer from overheating or dehydration. If there is no water for the animals there would be virusis.
(3)we need to not use much water or waste it like when you brush your teeth turn your faucet off and do not let it go down the drain.
(4)Water or the scientific use H2o is very interesting it has many things to study about like why is it clear and other things. what would you do when all water is dirty can you clean it?
(5) It would be important for scientist to study water so if it has a virus life would not be hurt or get the virus say there is some virus and a person drinks the water what would happen she would get sick that is why scientist study the water.