The periodic table is a chart created by scientists to organize the elements according to repeated changes of the properties.
Answer: <em>The upper caste was composed of rulers, nobles and priests. The middle caste were businessmen, merchants and soldiers. The lower caste was made up of farmers and slaves. Rulers: Each city had a ruling family.</em>
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The inquisition is the name of the system of church courts that used secret testimony and torture to root out heresy and force non-Catholics to convert to Catholicism.
The Inquisition was an investigative institution established within the government system of the Catholic Church to root out public heresy committed by baptized Christians. The Inquisition begun formally in the 12th-century and its primary function is to probe and expose Christians and church leaders that refused to accept the church’s principle or beliefs.
Answer: T
Explanation: Its very research-driven.
I believe the answer is: sleep debt
Sleep debt refers to accumulative effect that keep increasing as people keep not getting enough time for proper sleep. Studies show that in the long run, sleep debt would resulted in decreasing overall productivity and the actual effect of repaying sleep debt could only be felt if the debt is paid within one week period.
