Quiz 2.1 Scientific methods in science

Scientific approach to discoveries follows the order which includes

further experiments and problem solving

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theory, negative and positive results and experiments

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experiments, hypothesis and results

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observation, hypothesis and experiments

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Chemical hypothesis is different from chemical law in that

hypothesis is not reasonable while law is reasonable

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hypothesis is a reasonable explanation to observations made while law is a statement from a scientist

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hypothesis is a reasonable explanation to observations while law is a statement which confirms the hypothesis after extensive tests

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none of the above

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A testable explanation to a problem that has not yet been tested.

data

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theory

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fact

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hypothesis

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What role does a control group play in an experiment?

It is the group that receives the experimental treatment.

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It is the group that is exposed to the variable being tested.

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It is used to ensure that the results are due to the variable being tested.

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It is used to increase the sample size of the experiment.

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Which of the following is an example of qualitative data?

The temperature of a solution is 25°C.

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The solution has a pH of 7.

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The liquid is blue.

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The mass of the sample is 15 grams.

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What is the purpose of repeating experiments in scientific research?

To make the research more complex

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To confirm the reliability and validity of the results

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To increase the number of variables in the study

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To test the hypothesis under different conditions

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Which of the following statements is true about a scientific theory?

It is a temporary explanation that is not well-tested.

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It is a well-substantiated explanation of an aspect of the natural world.

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It is the same as a hypothesis.

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It can be proven to be absolutely true without exception.

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In which step of the scientific method do you analyze the data and draw conclusions?

Formulating a hypothesis

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Conducting the experiment

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Collecting data

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Interpreting results

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What is the main difference between a theory and a law in science?

A law describes a single observed event, while a theory explains a broader range of phenomena.

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A law is a well-tested explanation, while a theory is an observation.

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A law describes what happens, while a theory explains why it happens.

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A theory is a scientific fact, while a law is a hypothesis.

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What is the role of peer review in scientific research?

To increase the number of research articles published

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To ensure that research findings are accurately reported and valid

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To replace the need for experimental replication

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To modify the experimental design of the research

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