Question 1

Which of the following best describes the primary goal of science as discussed in the lecture materials?

Accepted Answer

To understand the natural world through systematic observation and evidence-based reasoning.

Question 2

Which step in the scientific method directly follows the formation of a hypothesis?

Accepted Answer

Experiments or surveys

Question 3

A scientist observes that a certain plant species only grows near rivers. She wonders if water availability affects its growth. She proposes, 'If water is necessary for this plant, then increasing water supply should increase its growth.' What part of the scientific method is this?

Accepted Answer

Hypothesis and prediction

Question 4

Which of the following scenarios best illustrates inductive reasoning in science?

Accepted Answer

Assuming all mammals have hair because every observed mammal so far has hair.

Question 5

Which of the following is an example of deductive reasoning as used in the scientific method?

Accepted Answer

Assuming a newly discovered organism is a dog and therefore must have hair, based on the general statement that all dogs have hair.

Question 6

Why is peer review an essential part of the scientific method?

Accepted Answer

It allows other scientists to evaluate and validate the findings before publication.

Question 7

A researcher collects data on the heights of 100 trees in a forest. Which step of the scientific method does this represent?

Accepted Answer

Observation/data collection

Question 8

Which of the following statements about scientific theories is correct?

Accepted Answer

A scientific theory is a well-supported explanation based on a body of evidence.

Question 9

A student claims that 'all metals conduct electricity' after testing copper, iron, and aluminum. What type of reasoning is the student using?

Accepted Answer

Inductive reasoning

Question 10

Which of the following best describes the relationship between a hypothesis and a prediction in the scientific method?

Accepted Answer

A hypothesis is a tentative explanation, and a prediction is a statement about what will happen if the hypothesis is correct.

Question 11

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

Accepted Answer

Ignoring contradictory evidence

Question 12

A scientist tests a new drug on two groups: one receives the drug, the other receives a placebo. What is the primary purpose of the placebo group?

Accepted Answer

To serve as a control group for comparison with the experimental group.

Question 13

Which of the following best illustrates the importance of evidence in science?

Accepted Answer

Scientific conclusions are based on the best available evidence, not personal beliefs.

Question 14

If a scientist observes that a certain chemical reaction always produces heat, and then predicts that the next time the reaction is performed it will also produce heat, which type of reasoning is being used?

Accepted Answer

Inductive reasoning

Question 15

Which of the following is a key assumption underlying scientific inquiry?

Accepted Answer

Natural phenomena have natural causes that can be understood through investigation.

Question 16

A scientist publishes her findings in a scientific journal. What is the next logical step in the scientific process?

Accepted Answer

Other scientists review and attempt to replicate her results.

Question 17

Which of the following best explains why scientific knowledge is considered tentative?

Accepted Answer

Scientific knowledge is based on current evidence and may change with new discoveries.

Question 18

A researcher wants to test if fertilizer increases plant growth. She sets up two groups: one with fertilizer and one without. She measures plant height after 4 weeks. Which is the independent variable?

Accepted Answer

Amount of fertilizer applied

Question 19

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

Accepted Answer

A hypothesis is a tentative explanation that can be tested, while a theory is a well-supported explanation based on a large body of evidence.

Question 20

A scientist observes that a certain species of bird migrates earlier each year. She hypothesizes that climate change is causing this shift. Which step should she take next according to the scientific method?

Accepted Answer

Design and conduct experiments or surveys to test her hypothesis.

Introduction to Science and the Scientific Method in Biology

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