I'm in 5th grade and I'm doing a science project on if seawater can be desalted by freezing... I tested three cups of seawater, each with different times in the freezer.. I have my control which is the seawater at room temperature... What do I chart on my bar graph... do I include the control in my bar graph?
Yes. Include your control in your bar graph.
IN SOLID LIQUID WHAT DO NOT MATTER
Great job on conducting your science project! For your bar graph, you would typically present the results of your experiment by comparing the different freezing times of seawater. You would have one bar representing each freezing time (e.g., 30 minutes, 60 minutes, 90 minutes), and the height of each bar would represent the amount of desalination that occurred for that freezing time.
Since you mentioned having a control group of seawater at room temperature, you should include it on the graph as well. The purpose of the control group is to provide a baseline for comparison. It allows you to see how much the seawater's salinity changes when exposed to freezing temperatures compared to the seawater at standard conditions.
In your graph, the control group should have its own bar labeled as "Control" or "Room Temperature." It would be a visual reference to compare the desalination levels achieved through freezing with the natural salt content in seawater.
Remember to label your x-axis (horizontal) with the different freezing times and your y-axis (vertical) with the measurement of desalination (you might calculate this as a percentage of the salt that has been removed).
Make sure your graph is clear, neat, and easy to understand. It should effectively demonstrate the relationship between freezing time and the desalination process. Good luck with your project!