1. Station #1 CLEAN UP; DUMP AND RINSE THE GLASS
Fill the beaker with 150 mL of tap water.
Carefully place the egg into the water.
Observe what happens.
Take the egg out of the beaker.
Mass out 25 g of salt.
Add the salt to the beaker; stir until it dissolves.
Carefully place the egg into the saltwater
CLEAN UP; DUMP AND RINSE THE GLASS

2. Station #2 CLEAN UP; DUMP AND RINSE THE GLASS
Fill one cup ¾ full with clear .“Freshwater”
Fill the medicine dropper with red . “Saltwater”
Place one drop of red water into your cup.
Observe what happens.
Fill the second cup ¾ full with clear .“Seawater”
Fill the second dropper with blue .“Freshwater”
Place one drop of blue water into your cup
Observe what happens
CLEAN UP; DUMP AND RINSE THE GLASS

3. Station #3
You will be using the hydrometer to measure specific gravity of the water samples.
Carefully float the hydrometer in the sample.
2. Read the value where the water line crosses the hydrometer.
3. Record this value in your data chart.

4. Station #3
The solutions were made by dissolving salt (sodium chloride) in water. If real bay and ocean water had been used, other solids would have been dissolved in the water as well. The graph shows the total percentage of these dissolved solids in seawater.

5. Rinse and dry the hydrometer
HYDROMETER INSTRUCTIONS:
Rinse and dry the hydrometer
Gently lower the hydrometer into the graduated cylinder. DO NOT DROP IT IN!!!!
Wait until it stops bobbing up and down and read the number on the scale at the top.
Rinse and dry the hydrometer and carefully set it back in the cushioned dissecting pan.

6. Station #4
Latitude
Evaporation (cm/yr)
Salinity (ppt)
60oN 27
33.0
50oN 63
33.9
40oN 90
34.6
30oN
120
35.5
20oN
133
36.7
10oN
124
35.8 0o
112
35.0
10oS
129
36.0
20oS
134
36.8
30oS
113
35.1
40oS 80
34.2
50oS 49
33.4
60oS 25
32.9
Use the data to create a LINE GRAPH of evaporation (cm/yr) as well as salinity (ppt) at various latitudes in the Atlantic Ocean. Remember, 0o is the equator, and temperature generally gets cooler as you move away from this region.

7. Read the article about the Dead Sea. Answer the questions provided.
Station #5
Read the article about the Dead Sea.
Answer the questions provided.

8. Station VI
Table 1 lists the approximate surface water salinities at various latitudes in the Atlantic and Pacific Oceans, Using the data to construct a salinity curve/graph for each ocean. Remember the independent variable should be placed on the X-axis and the dependent variable should be placed on the Y-axis. Use a different color for each ocean and include a key!

9. Station VII
Before you are 3 types of water, ocean, fresh, and brackish. Add small amounts of each water sample in different orders to the graduated cylinder until you determine which sample is the densest.
Record your results in your data chart.
Empty the graduated cylinder and clean up the station.