Question 1

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

Accepted Answer

Science is the process of seeking understanding of natural phenomena, while technology is the application of scientific knowledge for practical purposes.

Question 2

Which of the following statements about chemicals is TRUE?

Accepted Answer

Everything you see, touch, or use is made of chemicals, including food, air, and water.

Question 3

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

Accepted Answer

Melting a stick of butter.

Question 4

Which of the following best defines a scientific theory?

Accepted Answer

A tentative explanation that is always subject to revision based on new evidence.

Question 5

A mass of $$2.61\ \mathrm{kg} is $$how many grams?

Accepted Answer

$$2610\ \mathrm{g}$$

Question 6

Which of the following is a chemical property?

Accepted Answer

Iron rusts when exposed to oxygen.

Question 7

Which of the following best describes green chemistry?

Accepted Answer

The use of materials and processes that prevent or reduce pollution at its source.

Question 8

A 10.0-g sample of which of the following substances would have the greatest volume?

Accepted Answer

Hexane ($$0.660\ \mathrm{g/mL})$$

Question 9

Which of the following is a falsifiable claim?

Accepted Answer

Your fellow student claims to have memorized all of the element names and symbols on the periodic table.

Question 10

Which of the following best describes the relationship between mass and weight?

Accepted Answer

Mass is the amount of matter in an object, while weight is the force of gravity on that object.

Question 11

When one travels from Earth to the moon, one’s mass _____ and one’s weight _____.

Accepted Answer

remains the same/decreases

Question 12

Which of the following is an example of applied research?

Accepted Answer

Developing new products from peanuts to solve agricultural problems.

Question 13

Which of the following is a homogeneous mixture?

Accepted Answer

Rose gold, an alloy of gold and copper.

Question 14

Which of the following is the correct formula for density?

Accepted Answer

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

Question 15

Which of the following is a compound?

Accepted Answer

HI

Question 16

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

Accepted Answer

Liquid

Question 17

Which of the following processes represents a chemical change?

Accepted Answer

A bicycle left outdoors begins to rust.

Question 18

Which of the following is a correct conversion for Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 19

A metal sample has a mass of $$18.96\ \mathrm{g}$$ and a volume of $$4.31\ \mathrm{cm^3$}. $$What is its density?

Accepted Answer

$$4.40\ \mathrm{g/cm^3$}$$

Introduction to Chemistry: The Chemical World and Its Relevance

Guida di studio - Domande di pratica

Study guide - Flashcard