Web quest

1. Eratosthenes is most famous for  making the first accurate measurement of the Earths circumference.  
2. He is also famous for being a really good geographer.
3. Lastly he is mostly famous for his achievements in astronomy.
4. 7:00 am
5. 3:00 pm
6. 10:00 am 
7. 3:00 am 
For numbers 8-11 I found some but I didn't understand it and I couldn't find any on the web
8. Five toponyms of physical features are Greenland, grand canyon, rocky mountains,
9. 
10. Maryland, Baltimore, 
11.
12. 39.2904° N, 76.6122° 
13. 0.1807° S, 78.4678° W
14. 16.8414° S, 179.9813° W
15. 43.5321° S, 172.6362° E 
16. 58.3019° N, 134.4197° W
17. The point on Earth's surface diametrically opposite to it
18-20 the website did not work on my computer and I couldn't find the answer on other websites