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 NOT considered matter?

Accepted Answer

Sunlight

Question 3

A student drops an antacid tablet into water and observes bubbles forming. What is the best explanation for this observation?

Accepted Answer

A chemical reaction is occurring, producing a gas.

Question 4

Which of the following is a chemical commonly found in toothpaste that helps prevent cavities?

Accepted Answer

Fluorophosphate

Question 5

Which of the following statements about chemicals is TRUE?

Accepted Answer

All matter is made up of chemicals.

Question 6

Which of the following is an example of a chemical reaction you might observe in everyday life?

Accepted Answer

Baking a cake and seeing it rise in the oven

Question 7

Which of the following is NOT a function of a chemical found in toothpaste?

Accepted Answer

Providing energy for brushing

Question 8

A label on a dishwashing liquid lists sodium lauryl sulfate as an ingredient. What is the role of this chemical?

Accepted Answer

It helps to loosen and remove grease and food particles.

Question 9

Which of the following best describes the scientific method?

Accepted Answer

A systematic approach involving observation, hypothesis, experimentation, and conclusion.

Question 10

Which of the following is an example of a chemical property?

Accepted Answer

The ability of iron to rust when exposed to air

Question 11

A student is curious about what hemoglobin does in the body. Which step of the scientific method does this represent?

Accepted Answer

Making an observation or asking a question

Question 12

Which of the following is the best example of matter?

Accepted Answer

A glass of milk

Question 13

Which of the following is a correct statement about chemicals in food?

Accepted Answer

All foods are made up of chemicals, whether natural or processed.

Question 14

Which of the following is a plausible hypothesis for a scientific experiment?

Accepted Answer

If toothpaste contains fluorophosphate, then it will reduce the formation of cavities.

Question 15

Which of the following is an example of a chemical change?

Accepted Answer

Milk turning sour

Question 16

A toothpaste contains calcium carbonate. What is the primary function of this chemical?

Accepted Answer

It acts as an abrasive to remove plaque.

Question 17

Which of the following best describes the difference between a chemical and a mixture?

Accepted Answer

A chemical has a definite composition, while a mixture can have variable composition.

Question 18

Which of the following is the correct way to write 0.00056 in scientific notation?

Accepted Answer

$$5.6 	imes 10$$^{-4}$$

Question 19

A student reads the label on a cleaning product and sees 'sodium hypochlorite' listed. What is the best way to determine the function of this chemical using the scientific method?

Accepted Answer

Research its properties, form a hypothesis about its function, and test its effect on stains.

Question 20

Which of the following is a real-world example of chemistry improving health?

Accepted Answer

The use of fluorophosphate in toothpaste to prevent cavities

Chapter 1: Chemistry in Our Lives – Introduction to Chemistry, Matter, and Chemicals

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