What were the pH levels in the farm dam water? What does this tell us about the quality of the dam water (Hint, is it acidic or alkaline? is this healthy for organisms to consume or
live in)

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.