|
Wintering
South of the Border
Many Species Share a Small Area
Did
you notice that the Northern Hemisphere has more land mass
than the Southern Hemisphere does?
 |
 |
| The
blue shows the land mass in the
Northern Hemisphere. (Click
to enlarge.) |
The
blue shows the land mass in the Southern Hemisphere.
(Click
to enlarge.) |
Maps:
National Center for Atmospheric Research |
Try
This!
-
Enlarge
the first map. Use the grid (latitude and longitude) lines
to estimate the square units of land (in blue) in the Northern
Hemisphere.
-
Enlarge
the second map. Use the grid (latitude and longitude lines)
to estimate the square units of land there.
Note: 97% of Antarctica (covering the south
pole) is always covered in thick ice and snow. You can leave
that out when counting square units.
-
How
do the land masses in the hemispheres compare? What is the
ratio of land to water in each hemisphere?
| Ratios:
Land and Water |
|
Northern Hemisphere: for every 1 unit
(e.g., square mile) of land, there are . . . |
1.5
units of ocean. |
| Southern
Hemisphere: for every 1 unit of land, there
are . . . |
4
units of ocean. |
|
Next:
How much land can winter migrants find in Mexico? >> |
|
Monarch Butterflies
