I think the green film is probably algae, which can make the water yucky for the fish. The fish might be floating because the algae is taking away the oxygen they need to breathe. To prove it, I can catch a fish and look closely to see if it's sick or if the water feels different around the green stuff.
Answer the following in 3 sentences in a 3rd graders response
You have a pond on a piece of land near your house where you love to fish.
Recently you notice there is a large amount of green film forming on the surface.
When you disturb the green film with a stick, you notice that a few fish are floating on top of the water.
Why do you think this is happening? What can you do to prove it?
1 answer