Questions for the test contest B3
1. The Baltic Sea is divided between 9 countries. Which of these countries is NOT on the shore of the Baltic Sea?
2. Every year in the Baltic sea fall extremely large amounts of oily waste and waste water from household industrial and industrial activities. Thus, every year the Baltic sea gets up to 600 thousand tons of oil, 4 thousand tons of copper, 4 thousand tons of lead, 50 tons of cadmium and 33 tons of mercury. For the sea, which is updated through narrow Straits, such an amount of oil is huge, as a result of which the content of oil products in the water off the coast of this neighboring country exceeds the norms by ten times.
3. Why do Norwegian scientists from Marine Research Institute in Tromsø call the northern Barents Sea an Arctic “hot spot”?
The Barents sea is losing floating ice and getting warmer
Oil spills occur most frequently in this region
The rights to this area are subject to disputes between the Baltic states
4. Why Latvian scientists recommend when buying fish (salmon, sprat), especially caught in the Baltic sea, to buy smaller individuals and use it no more than once a month, and pregnant women are better to abstain at all. What is the reason for this restriction?
Fish contain harmful substances due to oil spills
Fish contain a large amount of microplastic
Fish contain high levels of dioxins and mercury due to industrial pollution
5. The amount of blue-green algae in the Baltic sea is growing rapidly, which poses a serious threat to the marine ecosystem. The reason for this rapid growth is the excessive flow of nitrogen and phosphorus. How do these substances get into the Baltic Sea?
With flushes from fertilized fields
With municipal wastewater
With industry waste disposal
6. According to the Baltic Marine Environment Protection Commission (HELCOM) a third of garbage gets into the Baltic sea as a result of this activity
Mineral extraction activities
8. In what year of the twentieth century the flow of pollutants exceeded the natural ability of the Baltic Sea to self-purify, and as a result of over-exploitation of resources in the Baltic Sea, an environmental crisis erupted. The sea has been declared an extraordinary area of the oceans.
8. Changes in the habitat — the water area and the shores of the Gulf of Finland — are the main cause of the disappearance of this species of seal. Their habitat is affected by the development of the reservoir itself and its shores - the construction of superports and large enterprises, the laying of gas and oil pipelines, and the reclamation of new territories. The growing volumes of shipping make life no less difficult: firstly, ice wiring destroys the ice on which animals breed their offspring; secondly, because of the growing traffic, the probability of man-made disasters increases. Who are we talking about?
Gray seal (tevyak)
Baltic ringed seal
9. Blue-Green algae are one of the first inhabitants of our planet. Appearing in water bodies in large quantities, they are sources of dangerous toxins not only for humans but also for the animal world. What substances, once in water, cause excessive growth of these algae?
Carbon and magnesium
Nitrogen and phosphorus
Iron and zinc
10. Which type of garbage is the most characteristic pollutant for seas in the world?
Plastic, including bags and PET bottles
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