Which of the following is true of a scientific theory?
A. It generates testable hypotheses, is supported by a large body of evidence, and is broad in scope.
B. It is only accepted after the person who formulated it has died.
C. It is formulated by many scientists over drinks at a convention.
D. It is a method or device that applies scientific knowledge for some specific purpose.
E. It must demonstrate the effect of one variable by testing control groups and experimental groups.
The Correct Answer and Explanation is :
The correct answer is A. It generates testable hypotheses, is supported by a large body of evidence, and is broad in scope.
Explanation:
A scientific theory is a well-substantiated explanation of some aspect of the natural world that is based on a body of evidence and has stood up to repeated testing and scrutiny. The characteristics that define a scientific theory include the following:
- Generates Testable Hypotheses: A theory must be able to generate predictions that can be tested through observation and experimentation. This means that if the theory is valid, it should lead to new hypotheses that can be examined under controlled conditions, allowing scientists to verify or falsify them.
- Supported by a Large Body of Evidence: Scientific theories are not mere guesses or speculations; they are backed by substantial empirical evidence. This evidence comes from various studies, experiments, and observations across multiple fields and can take years, even decades, to accumulate. For instance, the theory of evolution is supported by extensive fossil records, genetic data, and observations of natural selection.
- Broad in Scope: A scientific theory provides a comprehensive framework that explains a wide range of phenomena. For example, the germ theory of disease not only explains how specific pathogens cause disease but also informs various fields, including medicine, public health, and microbiology.
In contrast, options B, C, D, and E do not accurately reflect the nature of scientific theories. While theories can evolve over time and are subject to peer review, they are not merely accepted after the original formulators have died (B). They are formulated through rigorous scientific processes, often involving collaboration, but not in informal settings like conventions (C). Theories are not simply methods or devices; they are overarching explanations (D). Lastly, while experimentation is a crucial part of scientific inquiry, not all theories must demonstrate the effect of one variable through control and experimental groups in a singular test (E); they can incorporate various types of evidence and methodologies.