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16 Cards in this Set
- Front
- Back
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What was the Ice Age?
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A period of time in the past lasting millions of years when glaciers spread to cover nearly half of the Earth's land.
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What is a glacier?
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a great sheet of ice that moves slowly over a land surface
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How did people probably first reach the Americas?
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across Beringia (buh RIN jee uh)
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What is Beringia?
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a "land bridge" that formed between Asia & North America
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Who were the first people to come to the Americas?
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Asian hunters & gatherers
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What caused the people to want to settle in Middle America?
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*warmer lands of great variety
*large animal populations to hunt *ideal climates for growing food |
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What covers most of Middle America?
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steep mountains
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What is the Central Plateau?
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a large area of rolling hills
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Define tropical.
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refers to the area of the Earth that is near the equator, between the Tropic of Cancer and the Tropic of Capricorn
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What is the tierra caliente?
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means "hot land" and is the hottest region
sea level to 3000 feet |
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What is the tierra templada?
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means "temperate land" and has a generally mild climate
3,000-6,000 feet |
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What is the tierra fria?
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means "cold land" and has a cooler climate
above 6,000 feet |
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What do all three climate regions have in common?
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the rainy season from between the months of May and October
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What is a rain forest?
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a forest that receives more than 80 inches of rain per year
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What percentage of Earth's living things is found in rain forests?
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75%
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What are some features of a rain forest?
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*trees may grow to 200 feet tall
*canopy of trees so thick that little sun reaches the forest *unique environments *huge variety of plants and animals |
