Oceanography A Course Resources

Chemical Oceanography

Big picture

Instructor Information

Emily Kroutil

Email: Emily.Kroutil@gavirtualschool.org

Phone: 470-238-8663 (voicemail)

The resources in this newsletter are in addition to those found in MODULE 4: Chemical Oceanography of your course content. You should first go through the content and complete the quizzes and activities. These resources are to supplement your understanding of the concepts. Please contact me if you have questions!

ASSIGNMENT RESOURCES AND TIPS

Assignment: Chemical Oceanography Worksheet - NOT GRADED

  • The instructions for this assignment are on page 8 of the module.
  • While this worksheet is no longer required for a grade, it would be an excellent review for the module Test.

Assignment: Virtual pH Activity

  • The instructions for this assignment are on page 8 of the module.
  • Here is a video walking you through the lab (including enabling Adobe Flash if it is blocked): Virtual pH Activity Walkthrough Video (NOTE: You will need to be logged into your GAVS email in the same browser to watch the video)
  • Here is the document I edited in the walkthrough video: Virtual pH Activity Template
  • REMEMBER, you need to test ALL substances in Part 1.


  • Q: I don't see beer on the phet simulation...am I missing something?
  • A: No, beer has been removed from the simulation. You do not need to test the pH of beer.


Virtual pH Lab

Lab: Salinity Experiment

  • The instructions for this assignment are on page 8 of the module.


  • Q: In this particular experiment, are we supposed to come up with our own experiment, methods, and the materials that we need?
  • A: This particular lab is a design your own experiment lab so it is pretty open-ended. You can decide how you want to set up your experiment, as long as you make sure to have a control, independent, dependent variable, etc. The video I made for an earlier assignment, the Experimental Design assignment, will give you some tips and to what you should include when designing an experiment: https://web.microsoftstream.com/video/28af50df-c2c4-4517-bf46-54805e3a7f04


  • Q: I am struggling with this lab for the salinity experiment. I came up with my experiment, but I am not sure how to measure the density of the potato and the water without a scale. Can you help lead me in a direction to start?
  • A: For this experiment, you do not need to measure the density unless you want to. And for that, you will need a scale. Because salt water has salts in it, it will be more dense than fresh water. The saltier the water, the denser it will be. Have you heard of the Dead Sea? The Dead Sea is exceptionally salty, so salty, that people can float in the Dead Sea. So, for this experiment, you will want to know your salinity for each experimental group, which means you will want to measure how much salt you put in each and not just guess. Then, you’ll be able to rank your experimental groups from least to most dense. The prompt or purpose only states: “Develop a controlled experiment that will identify how increasing salinity influences the ability of a potato to float in water.” This means you do not have to calculate the density exactly, you only have to be able to rank your solutions from least to most dense.


  • Q: I'm unsure of how to set up my bar graph for that portion of the experiment....
  • A: I'm not sure a bar graph is the most appropriate graph for this type of data. It will really depend on what data you collected and what you are graphing. For a graph, your independent variable will be on the x-axis, so this will be what you changed in the experiment. The dependent variable, or whatever changed in response to your independent variable will be on the y-axis.


    Without seeing your procedure and what data collected, I cannot give you more detailed feedback for your graph. I can, however, provide you with some videos that can help you with graphs:


    Types of Graphs (bar vs line vs pie): https://web.microsoftstream.com/video/f69a28af-b2fd-4d96-8065-5c315409ce94


    How to make a line graph: https://web.microsoftstream.com/video/7dea5d7c-55ff-4c25-9d27-519375484f54


    You will need to be logged into your GAVS email in the same browser that you are trying to watch the videos in order for the videos to load. I hope this helps.

Lab: Dissolved Oxygen

  • The instructions for this assignment are on page 8 of the module.
  • Here is a video walking you through the lab (including how to calculate the average DO and how to make the required graph): DO Lab Walkthrough Video
  • Here is the document I edited during the video: DO Lab Template
DO Lab Walkthrough

Discussion: Buoyant Eggs - NOT GRADED

  • You are on a vacation in Las Vegas and while you are there, you and your family attend a magic show. For the grand finale, the magician takes two glasses of water and places them on the table. He then takes an egg and drops it in one glass of water and it sinks right to the bottom. He takes the egg out of the glass and places it into the second glass of water and it floats! Everyone is impressed by the magician's trick, except for you. You immediately know how he managed his magic! Explain how the magician performed his trick from a scientific example. What is another way he can design his experiment to impress the scientific community? Be creative!!!


  • Use the RUBRIC to help you write a discussion posting that will earn full points.
  • You MUST respond to two classmates with responses that are AT LEAST 3 sentences in order to earn full credit. "I agree with..." or "I disagree with..." is not enough to earn full points for a response. You must say why you agree or disagree and back up your reasoning.

Assignment: Water Cycle Activity

  • The instructions for this assignment are on page 8 of the module.
Big picture

Discussion: Water Water Everywhere

  • Over 70% of our world is covered by water, but this water is salt water! What are some ways that we can take the salt out or desalinate the sea water to provide plentiful freshwater? Give at least one unique idea and respond to the ideas of at least 2 other students.


  • Use the RUBRIC to help you write a discussion posting that will earn full points.
  • You MUST respond to two classmates with responses that are AT LEAST 3 sentences in order to earn full credit. "I agree with..." or "I disagree with..." is not enough to earn full points for a response. You must say why you agree or disagree and back up your reasoning.

Test: Chemical Oceanography

  • Please review your notes and complete the review resources on page 9 of the module before starting your test.
  • A great way to study for this test is to complete the non-graded Chemical Oceanography worksheet.
Big picture

Additional Resources

Chemical Oceanography
Virtual pH Lab
DO Lab Walkthrough