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The effect of temperature on salinity and pH of seawaterFeatured science projectScience project video


The hypothesis that increasing the temperature will cause the pH and salinity of seawater to increase, is proven to be true.

Drinking a small amount of seawater while we are swimming or playing on  the beach is quite harmless to us. However, drinking seawater to quench our thirst can be dangerous because our body will then need to use more water to remove the salt from our body through our urine. This will cause further dehydration in our body. Sea water should be desalinated and converted to fresh water before it can be used as drinking water.

Also consider

The experiment can also be repeated by placing a fan in front of a basin containing the seawater.

Try to repeat the experiment using containers with different surface areas, like pails or large trays.


Seawater -

Salinity, conductivity -

Thirsty – how about a cool, refreshing cup of seawater? -

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Complexity level:
Project cost ($):
Time required:
1 hour to prepare, 2 days for the science project experiment
Material availability:
Access to basic laboratory equipment required.
Safety concerns:

Handle hot plates carefully