1.4-1.4

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Anthropocene

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the central role humans play in shaping earth's environment

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Pangea

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primeval supercontinent that broke apart into modern continents and oceans

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tectonic plates

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large pieces of rock that form portions of the Earth's crust and mantle, which are in motion

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photosynthesis

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the conversion of carbon dioxide and water into carbohydrates and oxygen through the absorption of sunlight

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Pacific Ring of fire

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Ocean-girdling zone of crustal instability, volcanism, and earthquakes resulting from tectonic activity

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Pleistocene

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most recent period of the Late Cenozoic Ice age

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Glaciation

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a period of global cooling during which continental ice sheets and mountain glaciers expand

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interglacials

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warm periods during the ice age

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Holocene

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the current interglaciation period from 10,000 year ago to now

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Little Ice age

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cooling period between 1400-1900 with temperature fluctuations, droughts, storms and famine