Part C Temperature and Density Part B Salinity

Part C: Temperature and Density Part B: Salinity and Density Temperature affects ocean currents. Part A: Density Salinity affects ocean currents. You will now need to obtain the 4 1. Have your test tube from Part B. Observe any internal Itmovement. Obtain the 4 colored, different density solutions. is up to you different saline solutions. Record your observations. to determine the layering order of the solutions. Place one or two Repeat the procedures in Part A with the new solutions. This time 2. Obtain a beaker. it half full warm fingers’ width of each Fill solution, dropofof by drop, water. into the test tube (straw) you will be determining the order salinity. 3. Gently add them, a dropso ofthat yellow red dense food coloring thegocenter. without mixing theor most solutionatwill to the Observe the movement. Record your observation. bottom. Questions: Add anaice cube to the beaker of colored 1. 4. • Choose solution and place it intowater. the test(from tube (straw). In whichcolored order did you find the solutions layered bottom to 5. Make Add one ortotwo drops oforder dark in food coloring (blue the or green) directly sure record the which you place solutions. top)? on the another ice cube. colored Observesolution the movement. Record your observations. 2. • Choose and slowly place it in the test tube Why do you think this occurred? (straw) • If these materials were added to the ocean, which order would they 3. Questions: Ifarrange mixing occurs, start a new trial. Make sure to begin with a different themselves? • In which order did. Record you find solutions layered (from bottom to color. Reminder: all the data. 4. top)? Continue in this manner until you have determined the order of • Why do you think this occurred? density. • If these materials were added to the ocean, which order would they arrange themselves? Questions: • In which order did you find the solutions layered (from bottom to top)? • Why do you think this occurred? • If these materials were added to the ocean, which order would they arrange themselves? Fossils in Time By Karen Parlett Pleasants County Middle School Objective Overview Materials and Equipment Teaching Suggestions Time Procedures Safety Note Assessment Further Challenges