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Activity 4 Drawing a Map
jOb ective Learn to reproduce a map on a different scale by use of reference grids.
1. Textbook Instructions Activity 4 Drawing a Map
In this activity students learn to draw a map The scale of the map of Africa is 1 cm : 3,000 miles. Use a ruler to draw a
on a different scale by drawing reference grids map with a scale of 1 cm : 1,500 miles.
and using the principle of similarity.
How can the map be drawn on a different What you need: Ruler
(larger) scale than the source map? Some
may correctly guess that this can be done by Map of Africa
drawing a grid on the source map, a larger
grid on the target, and marking equivalent Enlarged Map
positions on the target grid
Example Answer
Have students solve this problem in a group.
The first step is to draw a reference grid
over the source map, then a similar grid on
the target.
Then mark each location where the
coastline crosses the reference grid, and
plot the equivalent (formally similar) location
on the target grid. The map can be filled in
freehand.
116
2. Build Understanding
The reference grid is the key to these problems.
190 NUMINO Teacher s Guide 1 cm : 3,000 miles 2 cm : 3,000 miles (1 cm : 1,500 miles)
Activity 4 Drawing a Map
jOb ective Learn to reproduce a map on a different scale by use of reference grids.
1. Textbook Instructions Activity 4 Drawing a Map
In this activity students learn to draw a map The scale of the map of Africa is 1 cm : 3,000 miles. Use a ruler to draw a
on a different scale by drawing reference grids map with a scale of 1 cm : 1,500 miles.
and using the principle of similarity.
How can the map be drawn on a different What you need: Ruler
(larger) scale than the source map? Some
may correctly guess that this can be done by Map of Africa
drawing a grid on the source map, a larger
grid on the target, and marking equivalent Enlarged Map
positions on the target grid
Example Answer
Have students solve this problem in a group.
The first step is to draw a reference grid
over the source map, then a similar grid on
the target.
Then mark each location where the
coastline crosses the reference grid, and
plot the equivalent (formally similar) location
on the target grid. The map can be filled in
freehand.
116
2. Build Understanding
The reference grid is the key to these problems.
190 NUMINO Teacher s Guide 1 cm : 3,000 miles 2 cm : 3,000 miles (1 cm : 1,500 miles)
