1 Click the button. 2 Use any tool to share how you completed/ and responded to the Day 4 Science/SS Activity from the learning path. Read the following article: https://oceanservice.noaa.gov/facts/whysalty.html Answer the following questions: 1. Where does salt come from? 2. What are the two ions found in salt water? 3. What is the percentage of concentration of salt in sea water? 4. If we were to separate out the salt from the water (find the concentration) and spread it over the Earth, the layer would be how thick? 3 Check your work. 4 Click the green check to submit your work.