Interactive Salinity, Temperature, Density Lab (6) (2) (1)

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School

Pasco-Hernando State College *

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Course

2001

Subject

Geology

Date

Apr 3, 2024

Type

docx

Pages

4

Uploaded by ElderScience8563 on coursehero.com

Salinity/Temperature/Density Lab This lab is designed to investigate the relationship between salinity, temperature and density. Salinity is a measure of dissolved solids in the ocean water. Density is the mass per unit volume of a substance. Materials needed: Block of wood Liquid food coloring: (Red, Blue, Yellow) Clear plastic shoe box or clear dish (Half filled with water that has been at room temperature for 1 hour). 150 ml (about 2/3 cup) of water with 1 Tablespoon salt and 4 drops of red food coloring. Mix the food coloring and salt in the water before you start. 150 ml (about 2/3 cup) of cold water with 4 drops of blue food coloring mixed into the water. 150 ml (about 2/3 cup) of hot tap water with yellow food coloring mixed into the water. Camera or cell phone (When you finish you will take a picture that you will send to your instructor.) Procedure: 1. Place one edge of the clear plastic shoe box that is half filled with room temperature water on the wooden block. See Figure 1 below and note that the picture does show the yellow water with the same condition as your experiment. You will start with red water that has dissolved salt. Do not add or prepare the three water solutions yet. 2. Place something white under and the side of your container. 3. The following solutions will be added to the clear water. (Be sure to read step 4 before adding the solutions.) a. Hot yellow water slowly added to the water in the plastic box b. Salty red water slowly added to the water in the plastic box. c. Cold blue water slowly added to the water in the plastic box. 4. Watch from the side of the container as you complete the following: Figure 1 Example for Salinity, Temperature and Density Lab
a. Slowly add the hot yellow water to the water in the plastic box. Pour from one side of the container (see diagram above). Record your observations. Once the water stops moving proceed to step 4b. b. Slowly add the salty red water to the water in the plastic box. Record your observations. Allow the solutions to stop moving and then proceed to 4c. c. Slowly add the cold blue water to the water in the plastic box. Record your observations. 5. Take a picture from the side of your experiment and email or attach it to your assignment. (Be sure to place your name on the email and assignment.) 6. Explain the results of the experiment on your Lab Data Sheet. 7. Send the completed Lab Data Sheet to your instructor at myPHSC. Figure 2. Picture of a similar experiment but with different water conditions.
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