1. How big was the Islamic empire when it was at its peak? (1 point).
From Spain to Pakistan

2. What was the place where Islam was born like? Give some features. (1’5 points)
Desert featureless ocean of sand, shrub and rock.

3. Why did Muslims travel by night? (1 point).
Because it was cooler.

4. Why did they use the stars to navigate? (1 point).
They were constant.

5. What did Al Sufi do to improve the knowledge of the stars? (1 point).
He named the stars and made a map.

6. What have we got as a result of the Earth’s tilt? (1 point).
The seasons.

7. Where was the fact that the earth is tilted discovered? Who did it? (2 points).
Alexandria a Greek mathematician called Eratosthenes.

8. How did they work out the Earth’s inclination angle? (2 points).
Dividing into two the angle of the sun at its highest and lowest position through the year.

9. What were Alkuyandi’s most important achievements? (2 points).
He calculated the Earth’s angle His calendars organized the religious rites.