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Introduction

What gives ocean water its salty taste? The answer lies in its salinity, the total salt content of the water. Saline (salty) substances are present in all water, even rain water, but sodium and chlorine are the two most abundant saline substances dissolved in ocean water.

1. Introduction
2. Get out the yardstick
3. Where did the salt come from?
4. Getting the evidence
5. Experiment 1 - Making a Hydrometer: How can salinity be measured?
6. Experiment 2 - Density Ball: How to make a standard for measuring density
7. Design Your Own Experiment