6. Решите кроссворд.
1.The process of sending out heat light.
2.To show that something is true or give reasons for belief in something
3.Coal, clay, sand are ... materials.
4.point
5. A kind of fuel which was used for ships i n the 19th century.
6. A period of hundred years.
7. A piece of strong cloth fixed in position on a ship to move it through the water by the force of the wind.
8. A measure of the capacity of an engine, representing the force needed to pull 550 potinds one foot a second.
9. Opposite to wide.
10. One of the earliest types of a boat.