State whether the following statements are true or false:
1. An actual distance between two places can be known with the help of a map.
2. Conventional signs are a part of maps.
3. If we stand facing the rising sun, the north direction will be on our back side.
4. Conventional signs give much information in bigger space.
5. Maps with scales are useful to foreigners while travelling.
6. Various geographical information can be known due to different colours in the maps.
7. PS is a conventional sign for post office.
