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Hypothesis, Laws, And Theories
Test Description: Unit 1
Instructions: Answer all questions to get your test result.
1) When may a hypothesis be revised?
A
after it has been proven to be correct
B
after at least one year from when it was first tested
C
based on scientific data
D
never
2) Sarah carried out an experiment to test a hypothesis. Some of her data supported the hypothesis, but some refuted it. What is the best thing for Sarah to do next?
A
Revise her hypothesis, and then retest it.
B
Change her data so that they support her hypothesis.
C
Assume the refuting data are invalid, and ignore them.
D
Reject her hypothesis completely, and start over.
3) In general, which type of scientific knowledge or understanding is least well supported?
A
theory
B
hypothesis
C
law
D
fact
4) Jia observes that adding a solution of sodium hydroxide to a clear liquid turns the liquid pink. She makes a hypothesis about why the liquid changed color. Which characteristic is least important for her hypothesis to have?
A
ability to be tested
B
ability to be proven incorrect
C
based on the opinion of her classmates
D
based on her current knowledge
5) Which statement summarizes the difference between a law and a theory?
A
A theory can be used to make predictions, but a law cannot.
B
A law describes natural phenomena, but a theory explains why those phenomena occur.
C
A theory is a conclusion that is drawn from observations and experiments, but a law provides an explanation.
D
A law is absolute, but a theory may be proven wrong.
6) Randy observed that cooked onions in his food taste very differently from the raw onions that he had on his salad. He wondered why that was so. He thinks that he has an idea, but he is not sure. What has he developed in his mind?
A
a fact
B
a law
C
a theory
D
a hypothesis
7) What is the primary difference between a hypothesis and a theory?
A
A theory is a prediction, but a hypothesis is an explanation.
B
A theory is supported by more data and observations than a hypothesis is.
C
A hypothesis is falsifiable, but a theory has been proven to be correct.
D
A hypothesis is more reliable than a theory.
8) The data from one particular experiment do not agree with a current theory. What is the next step?
A
Change the theory immediately.
B
Discard those data.
C
Change the data to agree with the theory.
D
Try to repeat the data from the experiment.
9) A series of experiments, which are repeated over and over, seem to suggest that a scientific theory is incorrect. What does this most likely mean?
A
The results should be modified to agree with the theory.
B
The experiments were faulty.
C
The theory must be revised.
D
The scientist was manipulating the results.
10) What is the best reason for the scientific community to accept a theory?
A
The theory contradicts an older theory.
B
An award-winning scientist proposed the theory.
C
The theory is supported by all the available observations and data.
D
The majority of the general public agrees with the theory.
*select an answer for all questions
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