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Mexican
students play the same game! (More >>) |
Overview:
Does our Earth have more land
or water? Spin or toss a globe to find out!
What
you'll need: An inflatable globe
or a spinning globe
- Land
or water? If
you have an inflatable globe,
stand in a group. One student should toss the globe to someone
else. The catcher should look at where his or her right-hand
index finger lands. Is it on water or land?
Put a mark on the board in one of those two labeled columns.
(If you have a spinning globe, have one student
spin it, with eyes closed, and move a finger up and down next
to the globe. After 5 seconds, someone says "stop"
and the student puts his or her finger on the globe.)
- Land
or water? Your conclusion. After 20 tosses (or spins),
tally your results. What can you conclude
about the amount of land on Earth compared to the amount of
water?
(About 75% of Earth's surface is covered with water. Only 25%
is covered with land. What percentages do you get from your
numbers?)
- Where
is the land? Look down at the Northern Hemisphere from
the north pole (top of the globe). Next, flip the globe and
look at the Southern Hemisphere from the South Pole. Which
hemisphere seems to have more land?
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| The
Northern Hemisphere from the North Pole |
The
Southern Hemisphere from the South Pole |
5.
Think and Discuss! Use this information to try to explain
why most migratory birds head north to breed.
Math
Extension: Measuring
Land Mass in Each Hemisphere >>
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