PS-1.1: Hypotheses: Question Preview (ID: 1958)


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A hypothesis is a
a) reasonable, testable, explanation of an observation b) wild guess c) true statement d) conclusion of a scientific investigation
Hypotheses
a) may or may not be supported by the experimental data. b) must always be supported by the experimental data. c) are always true. d) are of no value if the experimental data do not support them.
Sources of information used to write hypotheses must be
a) credible. b) accurate. c) relevant. d) all of the above.
Credible means
a) trustworthy. b) correct - based on supported data. c) related to the topic of the investigation. d) unsupported.
Accurate means
a) trustworthy. b) correct - based on supported data. c) related to the topic of the investigation. d) unsupported.
Relevant means
a) trustworthy. b) correct - based on supported data. c) related to the topic of the investigation. d) unsupported.
The results of an experiment
a) can prove that a hypothesis is true. b) are only useful if they support the hypothesis. c) can either support or not support the hypothesis. d) all of the above.
The formula for writting a hypothesis is
a) If the [DV] increases or decreases, then the [IV] increases or decreases. b) If the [IV] increases or decreases, then the [DV] increases or decreases. c) The [IV] increases when the [DV] increases. d) The [IV] always decreases when the[DV] increases.
Which of the following is a correctly written hypothesis?
a) If the amount of hydrogen ions in a solution increases, then the pH will decrease. b) I think the sunlight will affect the plants. c) All baseballs are spheres. d) When water freezes, it gets colder.
When hypotheses are tested over and over and always support the data,
a) they become known as laws or principles. b) they are accepted as true. c) they cannot be changed or modified. d) their is no need to keep on testing them.
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