Crusading Knights Needed a Minimum of Two Years' Revenues in Hand

question 37

True/False

Crusading knights needed a minimum of two years' revenues in hand to go on crusade.

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Definitions:

Atmospheric Air

The mixture of gases surrounding the earth, primarily composed of nitrogen, oxygen, argon, carbon dioxide, and trace gases.

Water Vapor

The gaseous phase of water, forming clouds and contributing to the greenhouse effect.

Pulmonary Capillaries

Tiny blood vessels in the lungs where gas exchange occurs, allowing for the uptake of oxygen and the release of carbon dioxide.

Left Atrium

One of the four chambers of the heart, receiving oxygenated blood from the lungs and pumping it into the left ventricle.