Why should an airplane pilot be able to recognize cloud types?

How does the concept of competition relate to the arms race between the us and the soviet union during the cold war?

All of the following changes typically happened in colonies as a result of imperialism, except: a. cultural practices were outlawed. b. they became more economically self-sufficient. c. european nations built modern infrastructure, including railways. d. the european language became the language of government and education.

What was the effect of the industrial revolution on the working class?