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adreamer adreamer
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7 years ago
What is the K-T boundary?
A) a layer of dark sediment in the geological record formed at the same time humans learned to use fire
B) a boundary between rocks containing the oldest life and older rocks that contained no life
C) a boundary between the Earth's crust and the molten rock beneath it
D) a layer of dark sediment in the geological record separating the Cretaceous and Tertiary periods of Earth's history
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Life in the Universe

Life in the Universe


Edition: 4th
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DonskoyDonskoy
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7 years ago
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adreamer Author
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7 years ago
Thanks for your help!!
halyna
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Yesterday
Brilliant ツ
cipcal
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2 hours ago
this is exactly what I needed
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