Answer:
1. A theory is a thought-out explanation for observations of the natural world that has been made by using the scientific method, and which brings together many facts and hypotheses. A theory can never be 100% correct because of trial and error. You may be figuring it out and you get an answer but, again many years later with different technology could bring another answer (therefore a different theory). If it was 100% correct it would be a fact.
2. In Ptolemy's geocentric theory of the universe, the Sun, the Moon, and each planet orbit Earth.
16. Kant's central idea was that the solar system began as a cloud of dispersed particles. He assumed that the mutual gravitational attractions of the particles caused them to start moving and colliding, at which point chemical forces kept them bonded together.
15. Nicolaus Copernicus
14. Benjamin Franklin
13. Locke
11. Her initiatives included the study of infant mortality, countering wasteful and unhygienic burial customs, and inoculation of children.
