1. A dangerous wave

2. A wave is a disturbance that propagates through water or air.

3. A wave can be quite an attraction…

4. But it can also bring death…

5. Tsunami – a harbour wave

6. Tsunami – a harbour wave

7. What causes tsunami.

8. An eruption of submarine volcano

9. Underwater tectonic activity
Sudden subsidence or upheaval of the ocean bottom

10. An asteroid hitting the Earth

11. Only a knowledge of reasons which cause tsunami and methods of early diagnosing its occurencies, can prevent us from a catastrophe.
Possibilities of diagnosing we owe to physics.

12. Based on: http://www.if.uj.edu.pl/pl/PFNMO/edukacja.php