Hi, I am in Ms. Diaz and Mr. Smith’s 4th-grade class. This week in Science, we started to solve a mystery about why in the fictional town of Gray Area all the fish were dying out. We had to figure out which place was causing the problem so we tested different water sources like the rain, lakes, streams, and more to see how much acid was in the water. We took samples of the different waters. We dropped in the indicator and it changed colors. You could tell by what color it was, how much acid was in it. Red was 7, green was 4, and yellow was 6.