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| Skills used |
Latitude & Longitude |
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Forming logical conclusions |
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Using scale to measure distance |
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| Vocabulary |
migration, glaciers, strait |
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| Materials Needed |
Globe in Horizon Ring Mounting |
Lesson
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| In your study of American History you will learn about the great
migration of early peoples from Asia to America. Many
scientists believe that these first Americans came by way of a land
bridge between Siberia and Alaska. This land bridge was formed at a time
when much more of the earth's water was frozen into sea ice and
glaciers, thus lowering the levels of the oceans. The land
bridge was in the area of the Bering Sea, so it was given the name of
Beringia.
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| On your globe, locate the Bering Strait at 66N/168W. Use the globe's
mounting ring or the scale printed on the globe ball to measure the
distance across this strait at its narrowest point. What
is this distance? (1)__________________________________________________
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| The average depth of all the oceans is about 11,000 feet deep. In
the Bering Strait the average water depth is about 600 feet (183 meters)
or less. Do you agree with the scientists that there could have been a
land bridge between Asia and North America at one time?
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| Look at your globe carefully. |
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2. |
Are there any other places on the earth where either
mainland North America or South America is closer than 100 miles
to another continent?________________________ |
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3. |
Of the other five continents, which is closest to the
mainland of either North America or South America?
________________________________ |
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4. |
How far is the mainland of South America from Antarctica? |
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