That really depends upon the river. In a large river, only the upper layer freezes and the water still flows underneath, but a smaller river might freeze completely. The temperature is also a factor, as well as the size of the river. At colder temperatures, larger rivers can freeze completely.
either the lake pond or river is not fully frozen, or they don't survive
A frozen river is called a frozen river. Rivers that normally flow as liquid water, are called frozen rivers when they become frozen.
The oil ends up under the frozen water.
You can walk on the water when its simply frozen, or if you want to run on a river (that`s not frozen of course!) you have to attain enough speed to be very light to run on water.
it would, but it needs to be in a really cold and you need it to be more than freezing point
Water will stay the same weight when it is frozen, it still has the same molecules that it started with
The top freezes. Under the frozen top is liquid water.
there is frozen water on mars some where under its surface
Potato
Years.
if you think so then maybe
It is a fact that there is water on the moon, just frozen under it's surface