Full mock test 1

Chorochromatic maps can be simple or compound. In simple chorochromatic maps, single features with patchy occurrence are depicted (for example, to show the distribution of forest reserves or coal fields in a country). Compound chorochromatic maps on the other hand show phenomena in which types and categories can be recognized. Chorochromatic maps can be used to show different types of soil, rocks, vegetation, etc. For example, in a full vegetation map, all different kinds of vegetation are shown on the same map, using different symbols or shading patterns. Usually the classification resulting in the identification of the unit types shown on a compound chorochromatic map is qualitative, based on apparently discontinuous features. However, in certain cases (for example, soil and vegetation) the aggregate unit area characteristics form parts of a continuum. Cartographers should be aware that chorochromatic maps that display non-area-related phenomena like religion or language may cause the map reader to misinterpret the map. The map reader may assume that the size of the area is proportional to the number of people in the area with that qualitative characteristic. To avoid misleading the map user, the cartographer can add a diagram showing the actual numbers involved.

The density of water is the weight of the water per its unit volume, which depends on the temperature of the water. The usual value used in calculations is 1 gram per milliliter (1 g/ml) or 1 gram per cubic centimeter (1 g/cm³). Coliform bacteria are present in the environment and feces of all warm-blooded animals and humans. Coliform bacteria are unlikely to cause illness. However, their presence in drinking water indicates that disease-causing organisms (pathogens) could be in the water system.