A cave is a hollow place in the ground, specifically a natural underground space large enough for a human to enter. Caves form naturally by the weathering of rock and often extend deep underground. The word cave can also refer to much smaller openings such as sea caves, rock shelters, and grottos, though strictly speaking a cave is exogene, meaning it is deeper than its opening is wide, and a rock shelter is endogene. A cavern is a specific type of cave, naturally formed in soluble rock with the
By Michael B. Rappaport and David A. Strauss. Article V of the Constitution says how the Constitution can be amendedâthat is, how provisions can be added to the text of the Constitution. The Constitution is not easy to amend: only twenty-seven amendments have been added to the Constitution since it was adopted. Article V spells out a few different ways in which the Constitution can be amended.
The Constitution may be amended according to the following process. First, an amendment must be proposed, and then, ratified. An amendment may be proposed by a majority vote of both houses of Congress, provided that no Amendment Convention is active.