Discover_our_World_Yellow / Lesson 1: The Ice Ages
The Polar Caps
There is the North and the South pole.
North pole is the top of the world and the South pole is at the bottom.
Icy, Icy, Icy
In the last one, over 1/3 the earth was covered with ice including most of Northern America & Europe.
The cool weather keeps the snow from melting even in the summer in some places and the build up each year can add up eventually causing an ice age
THE ICE AGES
2. Earth was frozen into sheets of ice called glaciers
3. Land that was once covered by water appeared
2. One "land Bridge" is called Beringia
3. Beringia land bridge was between Asia & the Americas
When you look at the continents, can you see how close the edge of the continent of Europe and the edge of North America are? Can you tell how easy it would be walk between the two continents if the level of the water in the ocean went down?
Well, that is exactly what happened during the last Ice Age.
Now that this land is dry, people and animals can walk it on. The land that now was showing created land bridges between the continents, which allowed people, and animals to migrate (move from one place to another) to other areas.