| Popis: |
Have you ever accidentally gotten seawater in your mouth? You probably spit it out because it tasted so bad, right? Even though it looks clear, water in rivers, bays, and oceans contains lots of other things besides H2O, including some things that are not healthy for people or animals! To determine the quality of a body of water, scientists measure the temperature and how much salt, sediment, and nutrients are present in that water. Too much or too little of these things, caused by pollution, floods, or droughts, might be bad for the health of the environment. Just like the porridge in the story of Goldilocks and the Three Bears, water quality must be “just right” to be healthy for the living things that need it. |
