Final answer:
The statement is false. A cross-section is typically a cut through an object to view its internal structure, while the intersection is where two lines meet. In geology, a proper cross-section is perpendicular to contact lines and reveals the true dip of layers.
Step-by-step explanation:
The statement "A cross-section is where two lines come together" is false. A cross-section typically refers to a cut or slice through an object or structure in order to view its internal structure. In geometry, this could mean the intersection of a solid and a plane. However, where two lines come together is known as an intersection, not a cross-section. In the context of constructing a geological cross-section, a line representing the cross-section should be perpendicular to any contact lines on a map, and where this line intersects the layers underneath shows their true dip, assuming the cross-section is properly oriented.
Additionally, cross-sections are important in various fields, like engineering and geology, where they help visualize and analyze the characteristics of a three-dimensional object or feature on a two-dimensional plane.