Yes you can. Anything fresh you can eat. Even if you just killed a cow you can eat it right at that second.
Hope it helped =)
You presumably mean fresh drinking water. To do this you must distil the water, that is boil it, which leaves the salt behind, and condense the steam elsewhere.
Yes but it will taste salty
You obtain salt water by letting the sea water evaporate.
Sea water must be filtered.
If you're meaning obtaining purified water from sea water i assume the process will be filtration.
simple distillation
Yes, it is true; this is a method to obtain salt from sea water.
No. You can melt ice or desalinate sea water to obtain sufficient drinking water.
Sea mammals cannot survive without fresh water, but they do not have to drink fresh water in order to obtain it. They get much of their water through the food they eat and through their own bodies which remove the salts from sea water and the water in their food.
You would use distillation, in which the ethanol and water will boil at different temperatures.
Not in the traditional sense, no. Sea sponges do not have digestive systems. Instead, they rely on the flow of the water they inhabit to obtain nourishment and to rid them of wastes.
Yes it is a physical change
Sea water can be used to obtain salt because water is a solvent, and sea water is generally near saturation. Because the water is full of salt, which does not evaporate, when the water evaporates, salt crystals are left behind. Essentially, you are not obtaining salt from the sea water, but removing the water from the sea salt.
No, sea sponges can not make their own food. They obtain their nutrition from the food particles in the water. Sponges primarily eat bacteria, phytoplankton, and other small food bits out of the water.