Question

A physical map usually uses various colors to represent different features. Some are common on most maps. For example, maps often use blue to indicate bodies of water. They use brown to mark mountains. They use green to indicate plains​.

Answer 1

Physical maps use color-coding to represent different surface features of the Earth such as bodies of water, mountains, and plains, while geologic maps use colors and lines to depict geologic units and contacts. Geologic maps are key in visualizing the Earth's three-dimensional features in a two-dimensional format and understanding geologic history. Additionally, topographic maps, with contour lines for elevation, are essential for practical applications involving the Earth's surface.

Step-by-step explanation:

A physical map is a tool that helps us visualize different features of the Earth's surface using color-coding. For instance, blue often represents bodies of water, brown for mountains, and green for plains. Geologic maps, on the other hand, take this a step further by illustrating three-dimensional features on a two-dimensional plane.

Geologic maps are complex and use a standard color scheme related to the geologic time scale, with the colors signifying different geologic units based on age and rock types. Important elements of a geologic map include contacts, represented by various lines such as solid, dashed, or dotted, indicating different types of geological contacts such as faults or intrusions. The colors and lines on these maps are essential for geologists and others interested in the Earth's geologic history or topology.

Additionally, the use of topographic maps is introduced, adding a vertical dimension to mapping through contour lines indicating elevation. This provides detailed topographical information and aids in comprehending the shape of the Earth's surface, crucial for various practical applications.

In the context of real-world applications, topographic maps are vital for individuals involved in land purchases, planning outdoor activities, or construction, as they highlight potential geologic hazards like landslides and floods.

Lastly, learning about map symbols, strike and dip, and the ability to read a stratigraphic column are fundamental skills for interpreting and creating geologic maps.