The Carbon-14 Activity of Some Ancient Indian Corn Was Found

question 111

Multiple Choice

The carbon-14 activity of some ancient Indian corn was found to be 7.0 disintegrations per minute (dpm) per gram of carbon. If present-day plant life has 16 dpm per gram of carbon, how old is the Indian corn? (t_1/2 = 5,730 yr)

• A) 6,800 yr
• B) 2,500 yr
• C) 4,700 yr
• D) 10,000 yr
• E) 7,200 yr

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Definitions:

Cognitive Learning

The acquisition of knowledge and understanding through thought, experience, and the senses.

Social Learning

Social learning is a theory that suggests people can learn new behaviors and information by observing others.

Conditioned Stimulus

A formerly neutral signal that, once paired with an unconditioned stimulus, begins to elicit a conditioned reaction.

Unconditioned Stimulus

In classical conditioning, it is a stimulus that naturally and automatically triggers a response without any prior learning.