PS Worksheet 27

1. B; breathe 2. A; air
3. The opening of Container A is too small.
There is not enough dissolved air in the
water, so the fish have to come up to the
surface to breathe more often.
4. The opening of Container B is big. There is
enough dissolved air in the water so the fish
only need to come up to the surface to
breathe once in a while.
5. I can use an air stone and connect it to an
air pump. OR I can put in some aquatic
plants.