Chemistry Middle School

Lab Report
Ocean Currents
It’s time to complete your Lab Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e.g., U2_ Lab_OceanCurrents_Alice_Jones.doc).
Introduction
What was the purpose of the experiment?
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What were the independent, dependent, and control variables in your investigation? Describe the variables for each part of the experiment.
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Experimental Methods
What tools did you use to collect your data?
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Write the procedure you followed for the second part of the experiment. List each step so that another student could follow the procedure and repeat your experiment.
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Data and Observations
Record your observations.
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Conclusions
What conclusions can you draw about how temperature and salinity affect the flow of water. Write an evidence-based claim.
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Draw a diagram (develop a model) that shows what happens when warm water mixes with cold water in the ocean. Use your model to explain how this causes ocean currents.
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Answers

Answer 1

Ocean currents are large-scale movements of water within the ocean, driven by a combination of factors such as wind, temperature, salinity, and the Earth's rotation.

What conclusions can be drawn about how salinity and temperature affect water flow?

As water becomes colder, it becomes denser and sinks, while warmer water rises to the surface. Similarly, as the salinity of water increases, its density increases, and it sinks, while less salty water rises to the surface. These density differences create circulation patterns, such as ocean currents and deep water circulation, which can have a significant impact on the distribution of heat, nutrients, and other important factors in the ocean environment.

An evidence-based claim that can be drawn from this information is that changes in temperature and salinity can have significant effects on the flow of water in the ocean. For example, if temperatures in a particular region of the ocean were to increase, it could potentially cause the water to become less dense and rise to the surface, which could disrupt ocean currents and affect the distribution of nutrients and other important factors. Similarly, changes in salinity, such as those caused by freshwater influx from rivers or melting ice, could also affect the density of ocean water and impact circulation patterns.

To find out more about ocean currents, visit:

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