1. the meridians of longitude are a set of imaginary vertical lines.

2. the lines of longitude are drawn all around the globe at an interval of

3. the line of longitude passing trough the British royal observatory at Greenwhich in London has been adopted as

4. how many longitudes does each hemisphere has?

5. A network of the lines of latitude and longitude intersecting each other is called a grid

6. places located at different meridians have different standard time

7. how many time zones does russia have?

8. how many time zones does USA have?

9. 1. What is a map?

10. Which type of map shows natural features like mountains, rivers, and oceans?