ThK-T Boundary Layer of Rock Was Formeduring a Mass Extinction

question 37

Multiple Choice

ThK-T boundary layer of rock was formeduring a mass extinction

• A)12 million years ago.
• B)2.5 million years ago.
• C)65.5 million years ago.
• D)125 million years ago.
• E)220 million years ago.

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Definitions:

Hessians

German mercenary soldiers hired by the British Crown to fight against the American colonial forces during the Revolutionary War.

Sovereign Nation

A political entity that possesses autonomy and independence, recognized by other states as having control over its territory and government.

Bunker Hill

A key early battle in the American Revolutionary War notable for the phrase "Don't fire until you see the whites of their eyes," demonstrating colonial forces could stand up to British regulars.

Articles of Confederation

The first constitution of the United States, ratified in 1781, which established a loose confederation of states with a weak central government, later replaced by the U.S. Constitution in 1789 due to its inefficiencies.