Category Archives: demonstration (easy)

More on density

Extremely simple experiment to illustrate the effect of density differences.

At room temperature, will coke cans float or sink in freshwater? And how about coke light?

coke_cans

Soft drinks in cans. Who knew you could do science with them?

Btw, this experiment is only easy if you are in a country where you can get the right soda brand both in normal and in light version in cans. Thanks to Anna’s friends for importing them for me! As we found out – Red Bull does not work.

Tasting sea water

Hands-on activity on sea water salinity

In the first lecture of the “introduction to oceanography” GEOF130 course 2013, we investigated water samples from four different regions: The Mediterranean, the tropical North Atlantic, the Baltic and Arctic sea ice. Just by tasting their different salinities (40psu, 35psu, 10psu and 5psu, respectively) students figured out which of the samples came from which region. And now what influences salinity in the ocean?