Question 1

Which of the following best defines 'matter' as described in the study materials?

Accepted Answer

Anything that has mass and occupies space.

Question 2

Which of the following is an example of a macroscopic object?

Accepted Answer

A planet

Question 3

Which statement about the scientific method is correct according to the study materials?

Accepted Answer

A hypothesis is a possible explanation for an observation.

Question 4

Which of the following is the correct order of steps in the scientific method?

Accepted Answer

Observation, hypothesis, experimentation, theory

Question 5

Which of the following best describes a scientific law?

Accepted Answer

A summary of what happens, based on repeated observations.

Question 6

According to the law of conservation of mass, what happens to the mass during a chemical reaction?

Accepted Answer

The total mass remains constant; matter is neither created nor destroyed.

Question 7

Which of the following is the correct SI base unit for mass?

Accepted Answer

kilogram ($$\mathrm{kg})$$

Question 8

A student measures the mass of a rock on Earth and then on the Moon. Which of the following is true?

Accepted Answer

The mass remains the same, but the weight changes.

Question 9

Which formula correctly relates weight ($$W$$), mass ($$m$$), and gravitational acceleration ($$g$$)?

Accepted Answer

$$W = mg$$

Question 10

Which of the following is a correct example of a chemical compound and its elemental composition?

Accepted Answer

Water ($$\mathrm{H_2O}$$): 2 parts hydrogen, 1 part oxygen

Question 11

Which of the following is NOT a correct SI base unit and its abbreviation?

Accepted Answer

Length: kilogram ($$\mathrm{kg})$$

Question 12

A micrometer is:

Accepted Answer

less than a millimeter

Question 13

Which of the following best describes a theory in science?

Accepted Answer

A set of tested hypotheses that gives an overall explanation of some natural phenomenon.

Question 14

Which of the following is a quantitative observation?

Accepted Answer

The temperature of the solution is $$25\ ^\circ\mathrm{C}.$$

Question 15

If a student wants to convert $$1\ \mathrm{cm}^3 to $$milliliters, what is the correct conversion?

Accepted Answer

$$1\ \mathrm{cm}^3 = 1\ \mathrm{mL}$$

Question 16

Which of the following statements about atoms and molecules is correct?

Accepted Answer

Atoms are the simplest form of matter and combine to form molecules.

Question 17

Which of the following is a correct statement about the periodic table?

Accepted Answer

It is a collection of all known elements (atoms) and their properties.

Question 18

A student claims that a theory can become a law if enough evidence is collected. According to the study materials, is this correct?

Accepted Answer

No, because theories and laws serve different purposes in science.

Question 19

Which of the following best explains why weight changes depending on location, but mass does not?

Accepted Answer

Weight depends on gravitational acceleration, while mass is an intrinsic property of matter.

Question 20

Which of the following is a correct SI base unit and its physical quantity?

Accepted Answer

Time: second ($$\mathrm{s})$$

Introduction to Chemistry: Matter, Scientific Method, and Measurement

Study Guide - Practice Questions