Question 1

Which of the following best describes a scientific hypothesis?

Accepted Answer

An educated guess that is testable and can potentially be proven wrong.

Question 2

Why are measurements considered a hallmark of good science?

Accepted Answer

They allow scientists to express observations using numbers, strengthening scientific knowledge.

Question 3

Eratosthenes used the difference in shadow angles between two cities to estimate the diameter of the Earth. If the angle measured was $$7.2^{\circ}$$, what fraction of a full circle does this represent?

Accepted Answer

$$\frac{7.2}{360}$$

Question 4

Which of the following statements about scientific theories is correct?

Accepted Answer

A scientific theory is a vast synthesis of well-tested hypotheses and facts.

Question 5

A scientist proposes that 'magnetic fields deflect moving charged particles.' Why is this a scientific hypothesis?

Accepted Answer

Because it can be tested and potentially proven wrong.

Question 6

Which step is NOT typically part of the scientific method?

Accepted Answer

Ignoring experimental results.

Question 7

Why is mathematics considered the language of science?

Accepted Answer

Because it allows scientists to express ideas clearly and unambiguously.

Question 8

Which of the following best illustrates the scientific attitude?

Accepted Answer

Willingness to change one's mind based on evidence.

Question 9

A scientific law is best defined as:

Accepted Answer

A hypothesis that has been repeatedly tested and not contradicted.

Question 10

Which of the following is NOT a characteristic of science?

Accepted Answer

A refusal to change ideas when new evidence is found.

Question 11

Aristarchus used observations of the Moon and eclipses to estimate its size and distance. Which scientific principle does this illustrate?

Accepted Answer

The use of measurement and mathematics to understand nature.

Question 12

Which of the following statements about scientific facts is correct?

Accepted Answer

A scientific fact is a close agreement by competent observers who make repeated observations.

Question 13

If a scientist measures the diameter of the Sun using pinhole images and expresses the result numerically, which scientific principle is being applied?

Accepted Answer

The principle that measurement strengthens scientific knowledge.

Question 14

Which of the following is an example of technology?

Accepted Answer

Using scientific knowledge to develop a new medical device.

Question 15

Which science underlies all other sciences?

Accepted Answer

Physics

Question 16

A hypothesis states that 'undetectable particles are some of nature's secrets.' Why is this NOT a scientific hypothesis?

Accepted Answer

Because it cannot be tested or proven wrong.

Question 17

Which of the following best describes the relationship between science and technology?

Accepted Answer

Science is the gathering and organizing of knowledge, while technology is the practical use of that knowledge.

Question 18

Which of the following is a strength of science?

Accepted Answer

Scientific knowledge can improve and change as new evidence is discovered.

Question 19

A scientist follows these steps: Question → Hypothesis → Prediction → Test → Rule. What is this sequence an example of?

Accepted Answer

The scientific method.

Question 20

Which of the following is NOT a life science?

Accepted Answer

Astronomy

Chapter 1: About Science – Foundations of Physics with Calculus

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