Difficult it is necessary wild animals in the winter. With the onset of cold weather the way of life of forest inhabitants significantly changes. But also in winter months the activity in the forest does not stop though frosts and deep snowdrifts complicate getting of food. It is even more difficult to reach through snow and ice water.

Outside our planet is covered with solid and cold earth crust. But deeply in it there is a heated liquid kernel consisting of magma. The processes happening in the planet create huge pressure. Through breaks in earth crust magma, less dense, than strong breeds, together with the gases dissolved in it comes to light. The volcanoes growing in process of the next eruptions are so formed.

The sunk ships are at various depths depending on the place where the vessel went to a bottom. Popular belief that under thickness of water density is so high that the ship cannot fall to the bottom and hangs over it. It's not true – the sunk ships are based in the very bottom.

To explain clearly as there is a volcanic eruption, it is possible to manufacture its model of the house. This good occupation for children and their parents during vacation or a disease.