Students will read a brief informational text and then determine what the causes are that threaten the health of the estuary. Multiple answers may apply.
Answers Page 1:
Top box - runoff from farms, waste from pets, sewage treatment plants, fertilizers, septic tanks, etc.
Middle box - viruses, bacteria, parasites
Bottom box - plants and animals stowing away in the ballast of ships, aquarium trade released species, nursery fish that escape, and ornamental plants
Answers Page 2:
Top Box - Building dams, pumping water from the ground, deredging for new water sources, housing developments, buildings constructed on coastline, new paved roads, etc.
Middle box - Mercury, lead, and chemicals used to kill fungus, viruses, and bacteria.
Bottom box - Housing developments and buildings constructed on coastlines, new paved roads, etc.