Page 208 - NUMINO TG_6A
P. 208
104_G6U13_TG 2014.4.17 6:55 PM ˘ ` 191 13Scale Down, Scale Up Unit
Material Ruler
Discuss ways to draw an enlarged map or reduced map. Introduce the concepts of longitude and
latitude. Point out that while this grid is not
To successfully draw a map, students can draw grids on the original map. Then draw identical to the simpler grids used in the
grids for the new map using ratios and proportions. After, students must draw the shape map exercise, they can be used in the same
in each square corresponding to the original map. way, either to locate specific points on the
globe or to construct a larger or smaller
Math Story Latitude and Longitude globe.
If students are comfortable with this
material, point out that while the equator
and lines of latitude are inherent, the
positioning of lines of longitude is a matter of
choice and convention.
Latitude and longitude are useful to find a longitude
country or city on a map. Latitude and
longitude provide coordinates of the earth. latitude
Any place on earth can be located using
latitude and longitude.
The latitude corresponds to the horizontal
coordinates. The equator is 0Ø, the North pole is 90ØN, and the South pole
is 90ØS.
The longitude corresponds to the vertical coordinates.
The Royal Observatory in Greenwich, England, is at zero degrees
longitude. Longitude extends 180 degrees to the East and 180 degrees to
the west.
13. Scale Down, Scale Up 117
If students have difficulty with the map plotting exercise, show the principle at work for simpler shapes that
fit the reference grid more exactly. The problems solved in Activity 2 can be used for this purpose, and will
ground students in work already done.
6A Unit 13 191
Material Ruler
Discuss ways to draw an enlarged map or reduced map. Introduce the concepts of longitude and
latitude. Point out that while this grid is not
To successfully draw a map, students can draw grids on the original map. Then draw identical to the simpler grids used in the
grids for the new map using ratios and proportions. After, students must draw the shape map exercise, they can be used in the same
in each square corresponding to the original map. way, either to locate specific points on the
globe or to construct a larger or smaller
Math Story Latitude and Longitude globe.
If students are comfortable with this
material, point out that while the equator
and lines of latitude are inherent, the
positioning of lines of longitude is a matter of
choice and convention.
Latitude and longitude are useful to find a longitude
country or city on a map. Latitude and
longitude provide coordinates of the earth. latitude
Any place on earth can be located using
latitude and longitude.
The latitude corresponds to the horizontal
coordinates. The equator is 0Ø, the North pole is 90ØN, and the South pole
is 90ØS.
The longitude corresponds to the vertical coordinates.
The Royal Observatory in Greenwich, England, is at zero degrees
longitude. Longitude extends 180 degrees to the East and 180 degrees to
the west.
13. Scale Down, Scale Up 117
If students have difficulty with the map plotting exercise, show the principle at work for simpler shapes that
fit the reference grid more exactly. The problems solved in Activity 2 can be used for this purpose, and will
ground students in work already done.
6A Unit 13 191
