lacuna definition, lacuna meaning | English dictionary. lacuna. 3 (Also called) caisson, lacuna an ornamental sunken panel in a ceiling, dome, etc.
The history of science and math are interrelated. The people who shaped science are also important in mathematics. As in science, the early history of mathematics is sketchy. We know that the lunar and solar cycles were counted by the Babylonians and Egyptians in an organized fashion.
Physical science usually has a prereq of pre-algebra, and the topics include chemistry, physics, and a smattering of related topics including astronomy and weather. It depends on what curriculum as to the topics. I've seen some books that are primarily physics and chemistry with little else, and some that go broarder.