1. How big was the Islamic empire when it was at its peak? (1 point).
2. What was the place where Islam was born like? Give some features. (1’5 points)
3. Why did Muslims travel by night? (1 point).
4. Why did they use the stars to navigate? (1 point).
5. What did Al Sufi do to improve the knowledge of the stars? (1 point).
6. What have we got as a result of the Earth’s tilt? (1 point).
7. Where was the fact that the earth is tilted discovered? Who did it? (2 points).
8. How did they work out the Earth’s inclination angle? (2 points).
9. What were Alkuyandi’s most important achievements? (2 points).