Charcoal Found Under a Stone at Stonehenge, England, Has a Carbon-14

question 9

Multiple Choice

Charcoal found under a stone at Stonehenge, England, has a carbon-14 activity that is 0.60 that of new wood. How old is the charcoal (The half-life of carbon-14 is 5,730 years.)

• A) Less than 5,730 yr
• B) Between 5,730 and 11,460 yr
• C) Between 11,460 and 17,190 yr
• D) More than 17,190 yr

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Definitions:

Sentry Duty

The act of guarding or watching for any danger or unexpected activity, typically in military contexts.

Context Effects

The influence of surrounding factors or the situational environment on the perception, interpretation, or memory of information.

Masking Stimuli

Visual or auditory stimuli that interfere with the perception of another stimulus, making it harder to detect or understand.

Subliminal Sensation

The process of responding to stimuli that are below the threshold of conscious awareness.