Objects float better in salt water than in fresh water because salt adds mass to water and makes it denser. This density causes objects to float better on the surface. The denser the water, the easier it is for objects to float on top.Know More
Less salt in water means things are not as buoyant, while more salt dissolved in water elevates objects. Density is defined as mass spread out over a particular volume. More particles within a smaller area leads to denser objects. Less dense objects float on more dense objects.
Simple science experiments show how salt causes things to float better. Take six containers of equal volume and add enough water to float an egg. Add increasing amounts of salt to five containers while leaving the sixth with no salt. Measure how each egg floats below and above the water line.
The Dead Sea in Israel is an example of dense salt water. The density of minerals in the Dead Sea are the highest concentration in the world, according to the Jewish Virtual Library. The reason more minerals stay in the water of the Dead Sea is that more water is evaporated from the sea than what goes into it. This evaporation decreases the amount of water and increases density of dissolved minerals.Learn more about Solutions & Mixtures
Adding salt to water actually boosts the boiling point a few degrees, but even with the higher boiling point, salt water boils faster than pure water because salt water has a lower heat capacity than pure water. This means that it does not take as much energy to boost the temperature of salt water as it does to heat up pure water.Full Answer >
Euglena are single-celled organisms that live mostly in fresh water, although a few species do live in salt water. They have long tails called flagella, which they use to move through water. Most species of euglena contain chloroplasts and produce their own food through photosynthesis.Full Answer >
Mixing salt with water results in the salt dissolving in the water to produce a saline solution. The salt splits up into positively and negatively charged ions that exist independently in the solution.Full Answer >
According to Science Kids, things dissolve faster in hot water because the molecules in hot water move at a greater speed, bumping more frequently against the solute (the item being dissolved). The more frequent bumping against the solute causes it to dissolve quicker in the water.Full Answer >