Final answer:
Gypsum is not formed by volcanoes erupting magma onto the surface. It is actually formed through a process called evaporative deposition when water containing dissolved calcium and sulfate ions evaporates, leaving behind deposits of gypsum.
Step-by-step explanation:
False. Gypsum, which is used in the construction of wall boards, is not formed by volcanoes erupting magma onto the surface. Gypsum is actually formed through a process called evaporative deposition. It occurs when water that contains dissolved calcium and sulfate ions evaporates, leaving behind deposits of gypsum. These deposits can be found in a variety of environments, including deserts, lake beds, and marine areas.