Question

student exploration: pond ecosystem
vocabulary: abiotic factor, algal bloom, biotic factor, concentration, eutrophication, mean, oxygen, parts per million, photosynthesis
prior knowledge questions (do these before using the gizmo.)

1. all animals need oxygen. we gtext cut off oxygen from the air we breathe. how do fish get theirs?

Explanation:

Fish obtain oxygen from water. Water contains dissolved oxygen, and fish use their gills to extract this dissolved oxygen from the water as it flows over the gill filaments. The gills have a large surface area and a network of blood vessels that allow for the diffusion of oxygen from the water into the fish's bloodstream and the removal of carbon dioxide from the bloodstream into the water.

Answer:

Fish get oxygen from the water. They use their gills to extract dissolved oxygen from the water as it passes over the gill structures. The gills have a high surface area with blood vessels that facilitate the diffusion of oxygen from the water into the fish's blood and the release of carbon dioxide from the blood into the water.