Probably not. Many Adult turtles could easily hold their breath for 15 minutes or much longer. Small turtles would likely be able to hold their breath for 5 minutes, IMO.
A turtle needs air to breathe. Some turtles can slow their metabolism, allowing them to sleep underwater, but it must come up to the surface of the water in order to breathe. It can hold it's breath and stay underwater awhile, but it must surface to breathe or it will drown. Turtles cannot breathe underwater because they do not have gills, like fish - they have lungs, much like human lungs. Some aquatic turtles such as the red-eared slider can hold their breath for 3-4 hours, which might make you think that they are breathing underwater, but they really are not.
yes, they need to fill their lungs with air. although aquatic they need land to bask and breed, if they get stuck underwater they will drown if they have no access to air.
No, of course not. If a turtle is upside-down underwater, it means that it is drowning. At those times, you must save them quickly before they drown.
Turtles have to go to the surface of water to breathe so if they get caught in underwater fishing nets they will drown.
Yes. Snails have gills, which makes them able to breathe underwater.
they do
to drown
Dolphins breathe air, so if they get trapped underwater they will drown.
I wouldn't risk it. They wouldn't last long with all the chemicals they put in pools. Turtles are better suited to salt or fresh water. Yes they can if there are no chemicals. If it is just for housing the turtle. Also if you're keeping it outdoors make sure that it can survive outdoors in your area. Be sure the turtle can climb out of the pool, and be sure Raccoons and other critters cannot get them.
yes, because you can't breathe in water.
you tell it "Swim or drown!!"
70% of the time a land turtle can drown it has lungs and is not capable of breathing underwater for a long time.