Question 1

In an experiment where researchers compare the effects of violent and nonviolent cartoons on children's play, what is the role of the cartoon variable?

Accepted Answer

It is the independent variable.

Question 2

A student hypothesizes that 'Women are better drivers than men' and is working to define what 'better' means in measurable terms. What is she developing?

Accepted Answer

An operational definition.

Question 3

After completing her research, Alayne submits her work to other experts for evaluation before publication. This process is known as:

Accepted Answer

Peer-review.

Question 4

Which statement best describes the scientific method?

Accepted Answer

It provides a formal, organized way for scientists to perform research.

Question 5

What is the first step in the scientific method?

Accepted Answer

Observe.

Question 6

A researcher wants to test the effect of a new fertilizer on plant growth. She measures the height of plants after applying the fertilizer. In this experiment, what is the dependent variable?

Accepted Answer

The height of the plants.

Question 7

Which of the following best illustrates an operational definition in a scientific study?

Accepted Answer

Specifying that 'better drivers' are those with fewer accidents per year.

Question 8

A scientist observes that a certain medication reduces symptoms in patients. She then forms a hypothesis and tests it with a controlled experiment. Which step comes immediately after forming the hypothesis?

Accepted Answer

Defining operational definitions.

Question 9

In a study, researchers manipulate the amount of sleep participants get and measure their reaction times. Which is the independent variable?

Accepted Answer

Amount of sleep.

Question 10

Which scenario best demonstrates the application of the scientific method in a real-world context?

Accepted Answer

A doctor observes patient symptoms, forms a hypothesis, tests treatments, and analyzes outcomes.

Question 11

A researcher defines 'violent acts' as 'any physical contact intended to harm another child' for her study. This definition is an example of:

Accepted Answer

An operational definition.

Question 12

Which of the following is NOT a step in the scientific method?

Accepted Answer

Ignoring contradictory evidence.

Question 13

If a scientist manipulates the independent variable to confirm her hypothesis, what is the main issue with this approach?

Accepted Answer

It violates the integrity of the scientific method.

Question 14

Which of the following best describes a hypothesis?

Accepted Answer

A testable prediction based on observations.

Question 15

A scientist observes a pattern, forms a hypothesis, defines operational definitions, and then designs an experiment. What is the next logical step?

Accepted Answer

Collect data.

Question 16

Which of the following equations best represents the relationship between independent and dependent variables in a simple experiment?

Accepted Answer

$$ y = f(x) $$

Question 17

In a peer-review process, which of the following is most likely to occur?

Accepted Answer

Experts evaluate the research for validity and accuracy.

Question 18

A scientist observes that increasing the concentration of a reactant increases the rate of a chemical reaction. Which step of the scientific method is this?

Accepted Answer

Observation.

Question 19

Which of the following best describes the dependent variable in an experiment?

Accepted Answer

The variable that is measured as the outcome.

Question 20

A researcher wants to test whether caffeine affects memory. She gives one group caffeine and another group a placebo, then measures their recall ability. Which is the independent variable?

Accepted Answer

Amount of caffeine administered.

Chapter 1: The Scientific Method – Key Concepts and Application

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