Ocean Water vs Fresh Water Ocean Water vs
- Slides: 20
Ocean Water vs Fresh Water
Ocean Water vs. Fresh Water Three ways in which fresh water differs from ocean water are: l. Salinity l. Density l. Freezing point
1. Salinity l. The amount of salt dissolved in a specific amount of water.
Where Does The Salt Come From? * salt comes from dissolved solids in the ground and volcanoes.
Fresh Water ltiny amounts of salt. Salt Water l. Average is 35 ppt. l. Varies depending on location.
How Does Location Affect Salinity? l Salinity increases at the equator. Why? l Salinity increases near the North and South Poles. Why? l Salinity is lower near the continents than in the middle of the ocean. Why?
Why Does Salinity Increase Near the Equator? l Due to the high evaporation rate of the water
How Does Location Affect Salinity? l Salinity increases at the equator. Why? l Salinity increases near the North and South Poles. Why? l Salinity is lower near the continents than in the middle of the ocean. Why?
Why Does Salinity Increase Near the North and South Poles? l when water freezes and changes to ice, it leaves the salt behind
How Does Location Affect Salinity? l Salinity increases at the equator. Why? l Salinity increases near the North and South Poles. Why? l Salinity is lower near the continents than in the middle of the ocean. Why?
Why Is Salinity Lower Near Continents? l due to rivers emptying into the oceans and diluting the salt water Lena river (Russia) empties into the Arctic Ocean Mississippi river emptying into the Gulf of Mexico
Where Do Canadian Rivers Go?
Ocean Water vs. Fresh Water Three ways in which fresh water differs from ocean water are: l. Salinity l. Density l. Freezing point
2. Density l. The amount of mass of a substance in a certain unit volume. l. How tightly packed together the material is in a substance.
l. Ocean water is more dense than fresh water due to the salt content. The Dead Sea Floating in the Dead sea is easy because it is 9 times saltier than Ocean Water.
Dissolved Solids in the Ocean
Ocean Water vs. Fresh Water Three ways in which fresh water differs from ocean water are: l. Salinity l. Density l. Freezing point
3. Freezing Point l. The temperature at which a liquid freezes. o Fresh water. . . 0 C o Salt water. . . -1. 9 C
The End
Assignment l Fresh water from rivers mixes with salt water when the river reaches the ocean. l Write a paragraph (1/2 page) predicting whether the fresh water mixes completely with, floats above , or sinks below the ocean water. l Support your prediction from what you have learned in today’s class.