ACHS Chem 120 Exam Questions With Complete Solutions

Which of these contributions did alchemists of the Middle Ages make to modern science? correct answer: -Sun-centered universe and metallurgy -Metallurgy and the development of scientific techniques -The scientific method and law of conservation of mass -Law of conservation of matter and first atomic theory -Law of conservation of mass and law of constant composition Which of these is the best definition of a scientific hypothesis? correct answer: -A prediction based on a limited number of observations -A method of explaining observations that appears contradictory -A broadly applicable generalization with virtually no exceptions -A method for approaching problems that is used by all scientists -A tentative model that describes the underlying cause of observations and laws Which of these is not part of the scientific method? correct answer: -Observation -Law -Theory -Conclusion -Experiment Which of these is the best definition of a scientific law? correct answer: -A prediction based on a limited number of observations -A method of explaining observations that appear contradictory -A broadly applicable generalization with virtually no exceptions -A method for approaching problems that are used by all scientists -A rule made by scientists to ensure consistency in their observations A statement that summarizes the data obtained from a series of observations is known as a(n) _____. correct answer: -observation -law -theory -conclusion -experiment A(n) _____ is an explanation of a scientific observation. correct answer: -speculation -theory -conclusion -prediction -epiphany Which of these statements about the scientific method is incorrect? correct answer: -It is a collection o