Final answer:
On a geologic map, 'strike' describes the trend and 'dip' describes the inclination of a rock layer or fault surface. Strike is the horizontal line at the intersection with the Earth's surface, and dip is the measure of the steepest slope of the feature.
Step-by-step explanation:
On a geologic map, measurements called strike (trend) and dip (inclination) are used to describe the orientation or attitude of a rock layer or fault surface. The correct answer to your question is option 1) strike; dip.
The dip indicates the angle of the steepest slope on a geological feature and is measured as the inclination of the rock layers. It shows the direction water would run down on the rock surface. The strike is a horizontal line that appears where a dipping bed intersects with the Earth's surface and is always 90° from the direction of the dip. Geologists often use a Brunton Compass to measure these orientations accurately. Remembering the 'rule of V's' can also be helpful in interpreting the dip of geological features when analyzing geological maps.