Materials: Fresh water sample from a local stream or pond 1000 milliliter beaker or large container 3 500 milliliter beakers or jars to set up miniature water ecosystems Dissecting microscope and hand lenses Graduated cylinder Dissolved Oxygen test kit (Chemical) Petri dishes Pipettes Fish tank pump and tubing with a t-connection so the tubing can provide air to 2 beakers Air regulator for beaker 2 or a paper clip Procedure: Working with a partner: 1.
(miniature water ecosystems; Dissecting; microscope and hand lenses) (the tubing; can provide; air; to 2 beakers Air regulator) (Petri dishes Pipettes Fish; Working; with a partner)
miniature water ecosystems the tubing Petri dishes Pipettes Fish
Dissecting can provide Working
microscope and hand lenses
air to 2 beakers Air regulator
with a partner