A topographic map uses contour lines to show changes in elevation and landform shapes, which is essential for planning infrastructure.Correct Answer: Elevation changes.
73.
Which of the following formations is typically the best aquifer?
Geotechnical investigations analyze soil and rock conditions to determine their strength, stability, and suitability for construction.Correct Answer: Subsurface soil and rock properties.
75.
In geological mapping, what are contour lines used for?
Contour lines connect points of equal elevation on a map and help visualize landforms and slope gradients.Correct Answer: Representing equal elevation.
76.
Which of the following is a foliated metamorphic rock?
Schist is a foliated metamorphic rock characterized by visible layers or bands caused by high pressure and temperature conditions.Foliation results from the alignment of platy minerals like mica.Correct Answer: Schist.
77.
Which factor directly affects the bearing capacity of soil?
Soil texture determines particle size distribution and compaction characteristics, which affect the soil's ability to bear structural loads.Correct Answer: Soil texture.
78.
Which process involves movement of weathered material?
Erosion is the transportation of weathered material by agents like water, wind, or ice.It differs from weathering, which is the breakdown of rocks in place.Correct Answer: Erosion.
79.
Which technique is used to map subsurface layers without excavation?
A seismic survey uses the propagation of seismic waves to map subsurface geological structures.It is commonly used in site investigations and oil exploration. Correct Answer: Seismic survey.
80.
What is the typical structure of sedimentary rocks?
