Question 1

Which of the following best defines chemistry?

Accepted Answer

The study of the composition, structure, properties, and reactions of matter.

Question 2

Which of the following is an example of a chemical reaction occurring in everyday life?

Accepted Answer

A tablet dissolving in water and producing bubbles.

Question 3

Hemoglobin is important in the blood because it:

Accepted Answer

Transports oxygen to the tissues and carbon dioxide to the lungs.

Question 4

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

Accepted Answer

Ignoring experimental results.

Question 5

A scientist observes that a certain chemical reaction always produces the same amount of product under the same conditions. This statement is best described as:

Accepted Answer

A law.

Question 6

If an experiment does not support a hypothesis, what should a scientist do next?

Accepted Answer

Modify the hypothesis based on the results.

Question 7

Which of the following is an example of a hypothesis?

Accepted Answer

Your doctor thinks that your weight loss is due to increased exercise.

Question 8

Which of the following strategies is LEAST effective for learning chemistry?

Accepted Answer

Rereading text or notes repeatedly without self-testing.

Question 9

A good study plan for chemistry should include all of the following EXCEPT:

Accepted Answer

Only studying the night before the exam.

Question 10

Which of the following best describes the relationship shown by a straight line on a graph of gas volume versus temperature?

Accepted Answer

A direct relationship: as temperature increases, volume increases.

Question 11

Which of the following numbers is correctly written in scientific notation?

Accepted Answer

$$2.4 	imes 10^3$

Question 12

Convert the number 0.0086 to scientific notation.

Accepted Answer

$$8.6 	imes 10$$^{-3}$$

Question 13

Which of the following is a benefit of studying chemistry in a group?

Accepted Answer

It allows you to discuss and clarify difficult concepts with peers.

Question 14

A graph shows the volume of a gas increasing as the temperature increases. What type of relationship does this represent?

Accepted Answer

Direct relationship

Question 15

Which of the following is an example of applying the scientific method in a real-world scenario?

Accepted Answer

A doctor observes a patient’s symptoms, hypothesizes a cause, and orders tests to confirm the diagnosis.

Question 16

Which of the following is the correct way to express 24,000 in scientific notation?

Accepted Answer

$$2.4 	imes 10^4$

Question 17

Which of the following is a key math skill necessary for success in chemistry?

Accepted Answer

Solving equations and interpreting graphs.

Question 18

A student is preparing for a chemistry exam. Which of the following study habits is most likely to improve their understanding?

Accepted Answer

Self-testing with quizzes and connecting new information to prior knowledge.

Question 19

Which of the following best describes a conclusion in the scientific method?

Accepted Answer

A statement made after analyzing experimental results to determine if the hypothesis is supported.

Question 20

Which of the following is an example of an observation?

Accepted Answer

Your trainer records that you ran for 25 minutes on the treadmill.

Question 21

Which of the following is the correct scientific notation for the width of a human hair, approximately 0.00008 meters?

Accepted Answer

$$8 	imes 10$$^{-5}$$

Chapter 1: Chemistry in Our Lives – Foundations of GOB Chemistry

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