Question 1

Which of the following best describes the difference between science and technology?

Accepted Answer

Science is the process of seeking an understanding of nature, while technology is the direct application of that knowledge to solve problems.

Question 2

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

Accepted Answer

A bicycle left outdoors begins to rust.

Question 3

Which statement about the Law of Conservation of Mass is correct?

Accepted Answer

The total mass of substances present after a chemical reaction is the same as before the reaction.

Question 4

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 5

A hypothesis in science must be:

Accepted Answer

Testable

Question 6

Which of the following is NOT a pure substance?

Accepted Answer

Air

Question 7

Which state of matter is composed of particles that are free to move about, but remain close together?

Accepted Answer

Liquid

Question 8

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture with uniform composition throughout

Question 9

Which metric prefix corresponds to $$10^{-6}$$?

Accepted Answer

Micro-

Question 10

A sample of iron has a mass of 156 g and a volume of 20.0 cm$$^3. $$What is its density?

Accepted Answer

$$7.80\ \mathrm{g/cm^3$}$$

Question 11

Which of the following is the correct formula for converting Celsius temperature to Kelvin?

Accepted Answer

$$T_K = T_C + 273.15$$

Question 12

A 747 is fueled with 173,231 L of jet fuel. If the density of the fuel is $$0.768\ \mathrm{g/cm^3$}$$, what is the mass of the fuel in kilograms? (1 L = 1000 cm$$^3)$$

Accepted Answer

$$133,000\ \mathrm{kg}$$

Question 13

Which of the following is an example of applied research?

Accepted Answer

Developing a new drug to treat cancer

Question 14

Which of the following is the correct equation for density?

Accepted Answer

$$d = \frac{m}{V}$$

Question 15

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 16

Which of the following is a limitation of science?

Accepted Answer

Science can only study observable phenomena and processes where variables can be controlled.

Question 17

Convert 2.44 meters to centimeters.

Accepted Answer

244 cm

Question 18

Which of the following best describes a scientific theory?

Accepted Answer

A model that explains why or how nature behaves as it does, validated by experiments.

Question 19

Which of the following is the correct formula for converting Fahrenheit temperature to Celsius?

Accepted Answer

$$T_C = \frac{5}{9}(T_F - 32)$$

Question 20

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Salad with various vegetables

Introductory Chemistry: Chapter 1 Study Guide – The Chemical World and Measurement

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