You have now learned how water can be stored as ice on land for thousands of years. This means that when the ice melts the sea level will change and that the world oceans were 120 m below the level of today during the latest ice age.
We have talked a lot about ice on land. But what about the ice you find in the sea? All of the North Pole is covered with ice, but the ice is floating in the sea. What happens when sea ice melts? Try out one of the two experiments and find out.
Why does the ocean not rise when the ice on the North Pole melts?
Melting icebergs – experiment with a block of ice