Lab Report: How Salty is the Sea?

First Name: Mayana
Age: 7
Experiment Title: How Salty is the Sea?
What was the purpose of your experiment? Provide a brief description of what you were hoping to learn, discover, or study.: How much salt we had to put in regular water to make it as salty as seawater.
What was your hypothesis?: I thought that to match ocean water I had to put 20% salt into a water solution.
What materials did you use in your experiment? List them all.: – Test tube
– water
– salt
– salinometer
What procedure was followed? Provide a brief description of the steps you followed during your experiment.: 1. Put water in test tube. (We did 80 ml)
2. Put salt into your measuring tube. (We did 20 ml)
3. Put salt water into the water.
4. Measure how salty real sea water is first.
5. Measure your salt water.
6. If your measurement was close the the actual salinity of ocean water, you are done. If not, repeat steps to add or subtract level of salt to get closer.
What were the results of your experiment?: The first time, I was way high (added way too much salt). Later, we changed the salt level and got much closer to the actual salinity of sea water.
What is your conclusion after conducting the experiment? Was your hypothesis correct or incorrect?: My hypothesis was incorrect. I thought there was much more salt (as a percentage) in the ocean than there actually is.
Spend a few minutes learning about the scientific principles involved in your experiment. Write 3-4 sentences about what you learned and how it relates to your experiment.: 1. A solution is a mixture of liquid and another substance that can be dissolved in it.

2. I learned how to use a salinometer.

3. Learned there is way less salt in the ocean than I originally thought.