Assignment: Scientific Measurements - DoDEA
Lab: Ocean Temperatures
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Name of Student: _____________________________ Date: _____________
In this laboratory experience you will analyze the ocean temperatures. You will generate hypotheses based on credible, accurate, and relevant sources of scientific information.
Directions: Complete the lab and type your response under each statement / question. Then submit this assignment as an attachment in Blackboard.
PROBLEM: How can we analyze temperature differences in ocean currents?
SKILLS: Map reading; comparing and analyzing scientific data
MATERIALS: Colored pencils, copies of the two maps of the Pacific Ocean
PROCEDURE
Part A
1. Examine the two maps of the Pacific Ocean (look at the end of this document). Notice the isotherms—lines that connect locations having the same temperature. Each isotherm represents a different surface temperature.
2. Use the colored pencils to highlight the temperature ranges indicated by the isotherms. Prepare a temperature key that shows the appropriate colors.
3. Next, color in the temperature ranges of the isotherms on your copy of each map, using the color key as a guide.
4. Study both maps to see if any significant difference is observable.
Part B
1. Which year had a cooler mid-ocean temperature at the equator, 1987 or 1988?
2. Compare the temperatures of mid-ocean water at 20°S and at 20°N for the two years. Is there a noticeable difference between them?
3. Based on the ocean temperature differences between the two maps, which year probably shows an El Niño? Explain.
4. What are countercurrents? Undercurrents? How is El Nino thought to be related to these currents?
5. How can ocean currents affect climate?
6. What drives the vertical movement of ocean water?
7. How have ocean currents influenced human history?
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