Most species of salmon swim up river to lay their eggs.
If you put the lettuce in fresh water there are more salts in the leaf than in the water, so the water will move back into the cells and make them rigid again, because the cells will swell. So if your lettuce in limp, laying it in water will make it crisp again.
fresh water
he swims up sidedown his back is white and has some sort of water proof cover over his wings
The water cycle ensures that water gets used again and again by constantly recycling water through processes like evaporation, condensation, and precipitation. Water evaporates from bodies of water, condenses into clouds, and then falls back to the Earth as precipitation. This cycle repeats itself, allowing water to be used over and over again.
A saltwater fish can't get enough oxygen from fresh water and vice versa. I believe it has something to do with the fact that salt water provides a certain pH balance that they need. Also some fishes can switch back and forth from (salt to fresh or fresh to salt) like the Salmon. Why... probably base on how their bodies evolve so that they can adapt and tolerate such changes. As for other saltwater fishes, if placed in freshwater, the pH balance and oxygen intake will become totally unbalance and end up killing the poor fishes.
A dolphin nostrils are actually located on it's back, and is called a blowhole. A dolphin swims to the surface, pushes it's back to the air, and breathes in. Now it has fresh air. Dolphins are evolved to be very efficient at using oxygen, so they do not have to get air very often.
The water cycle is the term for the movement of water from one part of the hydrosphere to another and back again.
The life cycle of a Salmon starts in a fresh water stream. After hatching the fish swims to the sea where it spends almost all of its life. Finally it returns back to the spot it was born; the fresh water stream, & to reach it, it even has to swim up the falls. This is only where it would have sex or lay eggs again.
The ship will sink slightly. Salt water is denser there for heavy objects will float more in it. When the ship goes back to fresh water the density decreases and the ship lowers again. This link gives extra information and some simple experiments for you to try at home. http://www.kidsgen.com/school_projects/how_ships_float.htm
.5 north
Yes, water cycle consists of precipitation. It brings the fresh water back to the water bodies.
The Earth makes sure that we get water because we can get it from lakes. Also we can get it form wells on the ground. All of these go right through your faucet all the time. It also is used again