The SI Standard of Length Is Based On

question 6

Multiple Choice

The SI standard of length is based on:

• A)the distance from the north pole to the equator along a meridian passing through Paris
• B)wavelength of light emitted by Hg¹⁹⁸
• C)wavelength of light emitted by Kr⁸⁶
• D)a precision meter stick in Paris
• E)the speed of light

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Definitions:

Primates

An order of mammals that includes humans, apes, monkeys, and prosimians, characterized by large brains, forward-facing eyes, and opposable thumbs.

Australopithecus Afarensis

An extinct hominin species known for the famous fossil "Lucy," significant for understanding early human evolution.

Homo Erectus

An extinct species of early human that lived throughout most of the Pleistocene geological epoch, known for its ability to walk upright.

Homo Habilis

An extinct species of early human that lived approximately 2.4 to 1.4 million years ago, known for using stone tools.