Contour lines

Contour lines

​Done by:

​Mr. Milos Vidosavljevic

​Geography Teacher

​SAIS - UAQ - UAE

​September 2021

​Lesson objectives:

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​,, I can''

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​- Define a contour line on a Topographic map

​- Identify different types of contour line

​- Identify the importance of Contour lines

Open Ended

What do you know about contour lines? 

​Contour lines are the most common method of showing relief and elevation on a standard Topographic map. It is drawn to show places of equal heights. Contour lines we can find only on a Topographic map where they can give us information about elevation, shape and a slope of an area.

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Contour lines are imaginary lines joining places of equal elevation above mean sea level.

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​There are 3 different types of contour lines:

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​1. Index

​2. Intermediate

​3. Supplementary

​1. Index contour lines

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​These lines are ticker than other contour lines and they are labeled with the number of elevation. Index contours occur every fifth contour line.

​2. Intermediate contour line

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​These contour lines are falling between index contour lines, they are finer, tiner than index lines and they don't have their elevations given. There are normally 4 Intermediate lines between two index contour lines.

​3. Supplementary contour line

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​These lines resemble dashes. They show changes in elevation of at least one half the contour interval.

Open Ended

Label Index and Intermediate contour line.

Multiple Choice

The distance between contour lines is known as

• Lines

• Interval

• Interval lines

• Contours intervals

Multiple Choice

Every fifth contour line, usually darker is referred to as

• Contour

• Index contour lines

• Intermediate contour line

Multiple Choice

The contour interval

• 20m

• 60m

• 10m

• 5m

Multiple Choice

What are these maps called?

• Line Maps

• Topographic Maps

• Circle Maps

• Mountain Maps

Multiple Choice

How many peaks are on the map? (hill tops)

• 4

• 3

• 2

• 1

Multiple Choice

_____________ is the height above sea level.

• elevation

• relief

• contour

• topography

Multiple Choice

What is the elevation at Position A?

• 1600

• 1500

• 20

• 240

Multiple Choice

What is the elevation at position B?

• 1500

• 1600

• 20

• 240

Open Ended

EXIT TICKET: 

1. Identify 3 types of Contour lines

2. Explain one of the contour line types.

3. What contour lines are showing to us?