A C T I V I T I E S
|Imagine an orange as a model of the earth.|
|Wash it with
soap and water to remove any waxy coating. Roll the orange on a table top with the flat of
your hand to loosen the peel. Take the orange and put a flat rubber band around the middle
of it, covering the stem and the navel. Now the orange is divided, into equal halves. Take
another rubber band and put it around the middle of the orange the other way, exactly
halfway between the stem and the navel. The first rubber band represents the prime
meridian; the second rubber band represents the equator. Mark along each line with a
marker, or scratch along each line with a straightened paper clip or a fingernail.
(Markers can be a little messy). Remove the rubber bands after you have traced both
circles on the orange.
|The first circle
you traced is the prime meridian, an imaginary line which goes through the
North Pole, England, western Africa and the South Pole. Using a globe for
reference, find and mark (or scratch) the approximate centers for each of
these land masses on the orange, using the lines you marked as guidelines.
(e.g. What part of Africa is above the equator? About how far would it go
south of the equator on your orange? What parts of Africa are west of the
prime meridian?) Find and mark the centers of other continents in the same
way. (Where is South America in relation to Africa and the equator?) Working
out from the center, scribble or scrape the rough shape of all the continents
on the surface of the orange. Don't worry about doing it perfectly and don't
try to draw outlines; it's almost impossible to draw them accurately. Scribble
in the shapes instead and concentrate on where places are in relation to
|When you are done, carefully
cut through the line around the equator with a plastic knife or a paper clip, without
cutting the orange underneath. Carefully slide your finger between the peel and the orange
segments to completely separate them. Now slowly remove the two hemispheres of your orange
without breaking any of the peel. (You may need help with this.) The lines between orange
segments, running parallel to the prime meridian and perpendicular to the equator,
represent lines of longitude. You can eat the areas between these lines.
|Place the two half globes, or
hemispheres, on the table with the continents facing up. If you wanted to have flat maps
like those in a book, the continents would have to be flat. What do you have to do to make
the 3D contintents into flat, 2D maps? Go ahead and flatten them. What happens?
|See how other people map the world...