Various colours are used in the map for presenting things or objects. For example, blue is used for showing water bodies, brown for mountain, yellow for plateau and green for plains.
Maps have a universal language that can be understood by all. There is an international agreement regarding the use of these symbols. These are called conventional symbols.
Everything or every object cannot be represented on the paper. For this purpose, symbols are used. Symbol contains letters, shades, colours, pictures, lines etc.
Compass is a magnetic instrument. We can find out the direction of a place with the help of a compass. It is used to find out directions. It has a magnetic needle which always points towards north-south direction.
When a small area like village or town is to be shown on paper, then we use a large scale and it is called large scale map. In the large scale map we use distance of metres in some cm. or mm.
When large areas like continents or countries are to be shown on a paper, then we use a small scale and it is called a small scale map. In the small scale map, we use large distances like hundreds of km in some cm. or mm.