Build a Hydrometer activity questions

1. Define the term salinity.

 Salinity is the total quantity or concentration of all dissolved inorganic solids.

2. If you add salt to a water solution, will a hydrometer float higher or lower in the water? Explain your choice.

 It will float higher because the salt makes the hydrometer more buoyant because the water is denser. 

3. What effect does the addition of salt have on the properties of water?

The addition of salt make the water more dense.

4. Is it easier to float in the ocean than in a swimming pool? Explain why or why not.

It is easier to float on the ocean rather than a pool because the water in the ocean is more dense because of its salinity. 

5. Define the term density.

Density is defined as a measure of quantity such as mass.

 6. The salinity of seawater is also affected by the temperature of a body of water. Explain how temperature causes differences in the salinity of water.

Cold water is more dense where as the opposite is true about warm water. This means cool ocean water is denser because the molecules of the liquid are moving slower. Warmth in liquids causes the molecules to move faster.