Question 1

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

Accepted Answer

A hypothesis is a specific, testable statement about the natural world, while a theory is a broad hypothesis that has been extensively tested and supported over time.

Question 2

In a controlled experiment testing the effect of Drug X on blood pressure, which of the following is the dependent variable?

Accepted Answer

The blood pressure measured in subjects

Question 3

A scientist observes that Drug X lowers blood pressure in rats, cats, and dogs. She then predicts that Drug X will lower blood pressure in all mammals. What type of reasoning is she using?

Accepted Answer

Inductive reasoning

Question 4

Which of the following is the correct sequence of steps in the scientific method?

Accepted Answer

Observe → Generalize → Formulate hypothesis → Make testable prediction → Experiment

Question 5

A researcher wants to test if a new drug reduces cholesterol. She gives the drug to one group and a placebo to another, ensuring both groups are similar in age and diet. What is the purpose of the placebo group?

Accepted Answer

To serve as a control group for comparison

Question 6

Which of the following sources is considered the most reliable for reporting scientific findings?

Accepted Answer

Peer-reviewed journals such as Nature or Science

Question 7

A scientist makes the following statement: 'If Drug X is a safe and effective treatment for high blood pressure in humans, then one dose of Drug X will lower blood pressure in people with high blood pressure within one month.' What is this statement an example of?

Accepted Answer

A testable prediction using deductive reasoning

Question 8

Which equation best represents the relationship between independent and dependent variables in a simple experiment?

Accepted Answer

$$y = mx + b$$

Question 9

A study finds a correlation between children sleeping with a light on and developing nearsightedness. Which of the following best explains why correlation does not imply causation?

Accepted Answer

Because a third variable, such as parental genetics, may be responsible for both

Question 10

Which of the following is an example of a fact, as defined in scientific research?

Accepted Answer

"Drug X has been shown to reduce blood pressure in 85% of those tested in the control group"

Question 11

When designing an experiment, why is it important to control as many variables as possible except the independent variable?

Accepted Answer

To ensure that changes in the dependent variable are due to the independent variable

Question 12

Which of the following best describes critical thinking in science?

Accepted Answer

Questioning information, seeking evidence, and verifying with multiple credible sources

Question 13

A scientist publishes her findings in a peer-reviewed journal. Why is this important for the scientific community?

Accepted Answer

It allows other scientists to review, replicate, and build upon her work

Question 14

Which of the following is NOT a component of a well-designed controlled experiment?

Accepted Answer

Manipulating multiple variables at once

Question 15

If a hypothesis cannot be tested, it is considered:

Accepted Answer

Speculation

Question 16

Which of the following URLs is most likely to provide credible scientific information?

Accepted Answer

www.nih.gov

Question 17

A scientist uses the following logic: 'All mammals have hearts. Dogs are mammals. Therefore, dogs have hearts.' What type of reasoning is this?

Accepted Answer

Deductive reasoning

Question 18

Which of the following best defines a scientific theory?

Accepted Answer

A broad hypothesis that has been extensively tested and supported over time

Question 19

Which of the following best illustrates the difference between anecdotal evidence and scientific evidence?

Accepted Answer

"I took Drug X and felt better" vs. "Drug X was shown to lower blood pressure in 85% of patients in a controlled study"

Question 20

Which of the following is a judgment based on facts?

Accepted Answer

Conclusion

The Scientific Method and Experimental Design: Foundations for Anatomy & Physiology

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