Question 1

Which of the following best describes a scientific hypothesis?

Accepted Answer

A tentative statement that explains an observed phenomenon and must be both testable and falsifiable.

Question 2

In the memory and coffee experiment described, what is the dependent variable?

Accepted Answer

The memory test scores of the participants.

Question 3

A researcher claims that eating ice cream causes sunburns because both increase during summer. This is an example of confusing:

Accepted Answer

Correlation with causation.

Question 4

Which of the following is an example of quantitative data?

Accepted Answer

A blood test result showing $$1600$$ units of a hormone.

Question 5

Why is a large sample size important in scientific experiments?

Accepted Answer

It increases the statistical significance of the results.

Question 6

A scientific theory is best defined as:

Accepted Answer

A hypothesis that has been repeatedly tested and consistently supported by evidence.

Question 7

In an experiment testing a new drug, the group receiving a placebo serves as the:

Accepted Answer

Control group.

Question 8

Which of the following statements about the scientific method is FALSE?

Accepted Answer

A hypothesis must be proven true before an experiment is conducted.

Question 9

Anecdotal evidence is considered less reliable in science because:

Accepted Answer

It has not been scientifically tested or systematically observed.

Question 10

Which of the following best illustrates the concept of falsifiability in a hypothesis?

Accepted Answer

A hypothesis that can be shown to be incorrect through experimental results.

Question 11

A scientist repeats an experiment several times and gets similar results each time. This process is known as:

Accepted Answer

Replication.

Question 12

In the coffee and memory experiment, which of the following is the independent variable?

Accepted Answer

Whether the participant received caffeinated or decaf coffee.

Question 13

Which of the following is an example of a testable and falsifiable hypothesis?

Accepted Answer

If plants are given fertilizer, then they will grow taller than plants not given fertilizer.

Question 14

A researcher finds that people who exercise regularly have lower cholesterol. Which of the following is a correct interpretation?

Accepted Answer

There is a correlation between exercise and lower cholesterol, but this does not prove causation.

Question 15

Which of the following best describes epidemiology?

Accepted Answer

The study of patterns of disease in populations and risk factors.

Question 16

A scientist wants to test if a new fertilizer increases crop yield. She sets up two fields: one with fertilizer and one without. What is the control group?

Accepted Answer

The field without fertilizer.

Question 17

Which of the following is an example of qualitative data?

Accepted Answer

A pregnancy test result that is positive or negative.

Question 18

If an experiment's results do not support the original hypothesis, what should a scientist do next?

Accepted Answer

Revise the hypothesis and design new experiments.

Question 19

Which of the following best explains why peer review and replication are important in science?

Accepted Answer

They help ensure that results are reliable and not due to chance or bias.

Question 20

A scientist observes that patients taking a new medication report feeling better, but there is no measurable change in their health. This is most likely an example of:

Accepted Answer

Anecdotal evidence.

The Process of Science: Scientific Method and Experimental Design

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