TEST_SDAIE_DE_LE_3.1_TheHistoryOfLifeOnEarth

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Match the following definitions and vocabulary

Draggable item		Corresponding Item
Cambrian explosion		a period of rapid growth in life's diversity from 540 to 485 million years ago
evolutionary tree diagram		a large supercontinent that consisted of all the land on Earth
mass extinction		A theory that the various species of living organisms have their origin in common ancestors
Pangaea		a diagram that depicts the evolutionary relationships between organisms
The Theory of Evolution		the loss of many species throughout the world in a short period of time
fossil		the preserved remains of an organism, or traces of an organism left by an animal

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Earth formed about __________.

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Which sentence describes when most types of organisms appeared?

Earth formed about 4.5 billion years ago. About 550 million years ago, most modern day Phyla have appeared in the Cambrian Explosion. About 200,000 years ago, modern humans, the last surviving species in the genus Homo, appear.

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Which sentence describes when humans appeared?

Earth formed about 4.5 billion years ago. About 550 million years ago, most modern day Phyla have appeared in the Cambrian Explosion. About 200,000 years ago, modern humans, the last surviving species in the genus Homo, appear.

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