​Carbon Isotope Dating Is Useful in Studying the History of Life

question 42

Multiple Choice

​Carbon isotope dating is useful in studying the history of life because ____.

• A)​the ratio of ¹⁴C to ¹²C in living organisms changed at key geological events
• B)​12C decays at a set rate based on a set time scale
• C)​14C is incorporated into fossil remains only
• D)​carbon is only incorporated into living organisms
• E)carbon is lost uniformly once an organism dies

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Definitions:

Running Load Current

The current drawn by a motor or appliance during normal operation, under specific conditions or loads.

Contactor Unit

An electromechanical switch used for switching an electrical power circuit, similar to a relay but with higher capacity.

Switch Contacts

The conductive parts of a switch that come together or separate to make or break an electrical circuit.

Mechanical Linkage

A system of interconnected levers or gears which transmits and modifies motion in machinery.