From the history of aviation

Ответьте на вопросы:

Was it interesting for you to read this text?

Did you read about the history of aviation at school?
When did the first scientific principles of human flight appear?
Who was the first to study the problem of human flight?
Describe the flying machine designed by Leonardo de Vinchi.
What was the first actual flight man made?
Why was it impossible to fly in a balloon?
Who was the first Russian aeroplane designer?
What plane was designed by him?
What distance did the plane cover?

2. 
   Переведите слова, обращая внимание на словообразующие элементы:
   

observe – observer – observation

safe – safely – safety – unsafe
science – scientist – scientific
design – designer
fly – flight
invent – inventor – invention
construct – constructor – construction
improve – improvement
weigh – weight - weightless
develop – development

3. 
   Найдите в тексте эквивалент следующим словосочетаниям:
   

полет человека, поток воздуха, конструктор самолета, конструкция крыла, модель вертолета, мировой рекорд, максимальная скорость, беспосадочный полет, паровой двигатель, лыжи самолета.