Chapter 5
The Baltic Sea

Find the correct answer for each question.

1. Water bodies in which the water is more salty than freshwater but less salty than water in the oceans are called

   1.   ?    Pelagic
   2.   ?    Brackish
   3.   ?    Omniolimnic

2. A bathymetric map is showing

   1.   ?    Depth in the sea
   2.   ?    Eutrophication in the sea
   3.   ?    Salinity isolines of the sea

3. Salinity in the Baltic Sea is

   1.   ?    Higher in the northern Baltic and lower in the southern.
   2.   ?    Lower in the northern Baltic and higher in the south.
   3.   ?    Higher in the north and south and lowest in the Gulf of Finland.

4. The Halocline is

   1.   ?    A layer in the sea water with a steep change in salinity.
   2.   ?    A geological layer with an esker-formation on the sea bottom.
   3.   ?    The deepest layer in a freshwater body.

5. The Thermocline is

   1.   ?    A layer in the sea water with a steep change in temperature.
   2.   ?    A layer in the sea water with a steep inclination in thermal energy.
   3.   ?    A layer in the sea water with more oxygen.

6. A disc that is lowered into the water to measure water transparency is named after a famous scientist. His name was

   1.   ?    Fr. Pietro Angelo Secchi
   2.   ?    Thomas Newcomen
   3.   ?    Wilford Gardner

7. Water rich in nutrients is

   1.   ?    Nutrophic
   2.   ?    Eutrophic
   3.   ?    Photrophic

8. Oxygen-free bottoms in the Baltic Sea can be found

   1.   ?    In the Baltic Proper
   2.   ?    In the Gulf of Finland
   3.   ?    In the Bothnian Bay

9. If you want to see long sandy beaches with dunes, which country is best to visit?

   1.   ?    Finland
   2.   ?    Sweden
   3.   ?    Poland

10. If you want to experience the large archipelagos of the Baltic Sea which country is best to visit?

    1.   ?    Lithuania
    2.   ?    Sweden
    3.   ?    Poland

11. The water dephs in the Baltic Sea on average is

    1.   ?    450 m
    2.   ?    190 m
    3.   ?    50 m

12. Water exchange between the Baltic Sea and the Atlantic ocean is restricted. Half-life of the waters in the Baltic Sea is

    1.   ?    2 years
    2.   ?    7 years
    3.   ?    25 years