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Ocean acidification is a big issue due to the amount of carbon dioxide humans release. CO2 in the atmosphere is absorbed into the ocean thus changing its acidity.

Learners create three solutions with different levels of salinity. They compare the density of these solutions by coloring them and layering them in a clear plastic cup and in a soda bottle.

In this activity, learners will create their own coral polyps - the basis for a coral reef.

In this activity, learners will explore how density is affected by temperature and how that can create currents.

In this activity, learners explore a bucket of sand and beach objects.