Question 1

Which of the following best describes a scientific hypothesis?

Accepted Answer

A statement that can be tested and potentially proven false.

Question 2

Why is falsifiability an important characteristic of a scientific hypothesis?

Accepted Answer

It allows the hypothesis to be tested through experiments and observations.

Question 3

In a well-designed experiment, what is the primary difference between the experimental and control groups?

Accepted Answer

The experimental group receives the variable being tested, while the control group does not.

Question 4

A researcher wants to test the effect of a new fertilizer on plant growth. Which of the following is the best way to set up the control group?

Accepted Answer

Use the same species of plants but do not apply the new fertilizer.

Question 5

Which of the following statements about scientific theories is correct?

Accepted Answer

They are hypotheses that have been repeatedly tested and supported by evidence.

Question 6

A scientist claims that a new drug reduces blood pressure. What must be true for this claim to be considered a scientific hypothesis?

Accepted Answer

The claim must be testable and falsifiable.

Question 7

Which of the following best explains why reproducibility is important in scientific experiments?

Accepted Answer

It allows other scientists to verify findings by repeating the experiment.

Question 8

A student claims that all swans are white. What makes this claim falsifiable?

Accepted Answer

It can be disproven by finding a single non-white swan.

Question 9

In a clinical trial, why is it important that the control and experimental groups are as similar as possible except for the treatment variable?

Accepted Answer

To ensure that any observed effect is due to the treatment and not other differences.

Question 10

Which of the following is an example of a hypothesis that is NOT falsifiable?

Accepted Answer

Invisible fairies make plants grow.

Question 11

A scientist conducts an experiment to test the effect of temperature on enzyme activity. Which variable should be kept constant in both the experimental and control groups?

Accepted Answer

The type and concentration of enzyme

Question 12

Which of the following best describes the relationship between a hypothesis and a theory in science?

Accepted Answer

A theory is a well-supported explanation that unifies a broad range of observations, while a hypothesis is a testable prediction.

Scientific Method and Experimental Design in Biology

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