They have a hibernation mode that makes then live a long time without oxygen.The hibernation mode is under the water and their heart beat slows down and you can barely detect it.Some turtles like the snapping turtle has a special gland that makes the water get oxygen on the lining on the throat.Nuff said
Lake freezes first at the surface is convection involved
It explodes and the apocalypse happens.... What do you think happens? it freezes
It freezes.
Yes, there are lots of turtles in Lake Victoria.
It freezes
On the shoreline in vegetated areas as well as the shallows when they are looking for food. The best areas are any channels on the lake.
You dry dock it.
it gets cold and freezes
There are lake effects in most lakes, but if it freezes its normal temps. Lake effects are the best answer i can think of.
if it is a cosmetic pond put your fish in an aquarium and drain your pump so it doesn't freeze and break drain your pond
about 4000,000,000,000
no sorry