## When contour lines are close together the slope is?

Contour lines that are relatively close together indicate a slope that is fairly steep. Contour lines that are further apart indicates a slope that is relatively flat. The area of the map above boxed in orange shows an area that has a fairly steep slope, while the area boxed in purple is a relatively flat area.

## How do contour lines show a steep slope?

Contour lines are used in a map to portray differences in elevation. When contour lines are closer together on a map, they indicate a steep slope. Think of contour lines as the distance between each incline. The closer together the inclines, the steeper the hill.

## Which of the following contour lines is a heavier line that is numbered?

Starting at zero elevation or mean sea level, every fifth contour line is a heavier line. These are known as index contour lines. Normally, each index contour line is numbered at some point.

## What’s the difference between contour lines and relief?

Contour lines are lines that show places of equal elevation. However, relief is the distance in elevation between the highest point on a map and the lowest point on a map (based on elevation). Relief does not tell you the exact elevation of a place, whereas contour lines can.

## What do elevation numbers mean?

Elevation is distance above sea level. Elevations are usually measured in meters or feet. They can be shown on maps by contour lines, which connect points with the same elevation; by bands of color; or by numbers giving the exact elevations of particular points on the Earths surface.

## Is elevation negative or positive?

Elevations can also be represented by negative numbers. The elevation at sea level is 0 feet. Elevations above sea level are positive and elevations below sea level are negative.

Protractor

## What is the instrument used to find angle of elevation?

A clinometer is a tool that is used to measure the angle of elevation, or angle from the ground, in a right – angled triangle. You can use a clinometer to measure the height of tall things that you can’t possibly reach to the top of, flag poles, buildings, trees.

## How do you measure elevation accurately?

The most important altitude measurement tool in your phone’s arsenal is the GNSS/GPS receiver. If your phone can find at least four satellites, with one directly overhead, you can usually get an altitude reading accurate to within 10 to 20 meters (35 to 70 feet).