Marine Science: Introduction to Density Lab
What is thermal stratification of the oceans and why does it occur?
stratification occurs when water masses with different properties -salinity, oxygenation, density,temperature - form layers that act as barriers to water mixing which could lead to anoxic event . These layers are normally arranged according to density, with the least dense water masses sitting above the more dense layers.
stratification occurs when water masses with different properties -salinity, oxygenation, density,temperature - form layers that act as barriers to water mixing which could lead to anoxic event . These layers are normally arranged according to density, with the least dense water masses sitting above the more dense layers.
MATERIALS:
- Two 250ml beaker, one 500 ml beaker
- A Electron Scale
- Glass stirring rod, spon
- Pickling Salt, Water Samples ( warm and cold), food coloring( yellow and blue)
What is the density? Density is when the physical property of a substance that describes the degree of compactness of a substance or how closely packed together the atoms are. The more closely packed the atoms are in a substance, the more dense it is.
Density= mass/volume
Density= mass/volume
Step 1 : Measure each 250ml beaker to see the mass. We got for beaker #1 is 111.5 g and 111.9 g for Beaker#2
Step 2: We push in the 250ml of cold water into the Beaker #1 and the warm water in to the Beaker#2 => To the cold beaker we add 20g of salt and 5 drops of blue food coloring ( mix up) => add 5 drops of the yellow food coloring to the warm, fresh water ( no salt, mix up)
Step 3: Measure each Beaker , we got 362.6g for #1 and Beaker#2 is 3319.9g
Step 4: Let calculate the density of the water in each beaker D= M / V
We got the density is 1.4504g/ml ( Beaker #1)
1.3276g/ml ( Beaker #2)
Step 2: We push in the 250ml of cold water into the Beaker #1 and the warm water in to the Beaker#2 => To the cold beaker we add 20g of salt and 5 drops of blue food coloring ( mix up) => add 5 drops of the yellow food coloring to the warm, fresh water ( no salt, mix up)
Step 3: Measure each Beaker , we got 362.6g for #1 and Beaker#2 is 3319.9g
Step 4: Let calculate the density of the water in each beaker D= M / V
We got the density is 1.4504g/ml ( Beaker #1)
1.3276g/ml ( Beaker #2)