Question 1

Which of the following best describes a compound?

Accepted Answer

A substance made of two or more different elements bonded together.

Question 2

Which process is an example of a physical change?

Accepted Answer

Melting ice into water.

Question 3

A student mixes salt and water in a beaker. Which statement is correct about the resulting mixture?

Accepted Answer

It can be separated by physical means.

Question 4

Which property is intensive?

Accepted Answer

Density

Question 5

Which of the following is a chemical change?

Accepted Answer

Burning wood in a campfire.

Question 6

Which statement about elements is correct?

Accepted Answer

Elements are made of only one kind of atom.

Question 7

Which of the following is NOT a pure substance?

Accepted Answer

Salt water

Question 8

A sample of gold has a mass of 50 g and a volume of 2.6 cm$$^3. $$What is its density?

Accepted Answer

$$\frac{50}{2.6} = 19.2\ \mathrm{g/cm^3$}$$

Question 9

Which of the following best explains why density is an intensive property?

Accepted Answer

Density does not change when the amount of substance changes.

Question 10

Which of the following is a mixture?

Accepted Answer

Air

Question 11

Which property would change if you cut a block of iron in half?

Accepted Answer

Mass

Question 12

Which statement is true about chemical changes?

Accepted Answer

Chemical changes create new substances.

Question 13

Which of the following is an example of a pure substance?

Accepted Answer

Copper metal

Question 14

A student observes that melting ice does not produce a new substance. What type of change is this?

Accepted Answer

Physical change

Question 15

Which of the following statements is correct regarding mixtures?

Accepted Answer

Mixtures can be separated by physical means.

Question 16

Which of the following is a chemical property?

Accepted Answer

Ability to burn

Question 17

Which of the following is true about mass and volume?

Accepted Answer

Both are extensive properties.

Question 18

Which of the following best describes the atom?

Accepted Answer

The basic unit of matter.

Question 19

Which of the following is an example of a chemical change in a medical context?

Accepted Answer

Digesting food in the stomach.

Question 20

A mixture of sand and iron filings is given to a student. Which method would best separate the two substances?

Accepted Answer

Using a magnet to attract the iron filings.

Introduction to Matter and Its Properties

Study Guide - Practice Questions