Workshops at Nature Education Centre

3 December 2012

What did we study?

• The fishes of the Baltic sea

Who? – Kairo, Oliver, Jarek

Who? – Ragne, Kätlin

What else? Who else?

• Ayual- water test the chemical constitution of seawater and marsh water

• Mari-Liis and Anni

And…

• The condition of the Baltic Sea, and oil pollution in the water

A sample from the worksheet

PRACTICAL WORK Your research task is to observe the behaviour of oil in water and experiment with various options to liquidate oil pollution. Experiment 1. Modelling an oil spill. Take a clean glass jar filled with faucet water and add a drop of blue ink. Also add some salt (about 1 tsp per a 1.5L jar) to imitate sea water. Mix and let the solution settle.

1. How does sea water differ from faucet water? Find between one and three differences.Sea water is salt water, feculent and includes a lot of bacteria

In a cup mix thoroughly two teaspoonfuls of cooking oil and two teaspoonfuls of cocoa powder – this yields the “mazut” you will need for the experiment. Take a spoon to help you. Let the oil mixture or the “mazut” transfer very slowly (1) from the spoon, at the height of about 1 cm, onto the surface of the “sea water” in the glass jar. NB! If you pour too quickly or from too high, the experiment will fail and you need to start all over.

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