Question 1

Which of the following best describes a scientific law?

Accepted Answer

A brief statement or equation that summarizes repeated past observations and predicts future ones.

Question 2

Which step in the scientific method involves designing a controlled procedure to test a hypothesis?

Accepted Answer

Experiment

Question 3

A student observes that ice melts faster in salt water than in pure water. Which step of the scientific method is this?

Accepted Answer

Observation

Question 4

Which of the following is NOT a physical property?

Accepted Answer

Ability to react with acid

Question 5

Which statement about matter is correct?

Accepted Answer

Matter is anything that occupies space and has mass.

Question 6

Which of the following is an example of a compound?

Accepted Answer

Sodium chloride ($$\mathrm{NaCl})$$

Question 7

A mixture can be separated into its components by which of the following methods?

Accepted Answer

Decanting/filtration

Question 8

Which of the following best describes a solid?

Accepted Answer

Atoms or molecules packed close together with fixed shape and volume.

Question 9

Which of the following is a chemical change?

Accepted Answer

Burning wood

Question 10

Which statement about scientific theories is true?

Accepted Answer

They can be modified if new evidence is found.

Question 11

Which of the following is a pure substance?

Accepted Answer

Carbon dioxide ($$\mathrm{CO}_2)$$

Question 12

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

Accepted Answer

Ignoring data that does not fit the hypothesis

Question 13

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

Accepted Answer

Evaporation of water

Question 14

Which of the following statements about elements is correct?

Accepted Answer

Elements are made of individual atoms.

Question 15

Which property can be used to separate mixtures by distillation?

Accepted Answer

Boiling point

Question 16

Which of the following is a crystalline solid?

Accepted Answer

Diamond

Question 17

Which of the following is NOT a characteristic of gases?

Accepted Answer

Atoms or molecules are packed close together

Question 18

Which of the following best describes a mixture?

Accepted Answer

A combination of two or more substances that can be separated by physical means

Question 19

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

Accepted Answer

Melting point

Question 20

Which of the following statements about molecules is correct?

Accepted Answer

Molecules are two or more atoms joined chemically in a specific geometric arrangement.

Chapter 1: Matter, Measurement, and Math – Foundational Concepts in Chemistry

Study Guide - Practice Questions