What plants live in a lake?
seaweed and many others
In the winter ice floats on the top of a lake.How is this helpful to the plants that live in the lake?
Suppose a lake were polluted by acid rain how might you make it safe again for animals and plants to live there?
There are no standard collective noun for plants or animals in general that live on a lake bottom. There are standard collective nouns for specific species, for example: a clump of reeds a bed of mussels an army of frogs a knot of toads a bale of turtles a rout of snails a shoal of bass And of course, a school of fish.
In what ways do you think the plants and animals that live in the fast moving water of rivers must be different from the animals and plants that live in a still lake?
In fast moving rivers, plants can be carried away. Dirt can also be moved, possibly decreasing the amount of plant life in different areas. In a still lake, nothing moves around, so my guess is that nothing changes much. But, I'm not a scientist, so I wouldn't recommend using my answer for school work.
If it is an unnamed lake or pond that is part of your own property, yes. If it is a named or designated lake in the state or province you live in, no. Say, for example, you live in (fictional) Catalin County, Missouri. There is a designated lake in Catalin County named "Forrester Lake". Your property fronts on Forrester Lake. You need a license to fish that lake.