Question 1

Which of the following best explains why graphite and diamond, both made of carbon, have such different properties?

Accepted Answer

They have different arrangements of carbon atoms at the molecular level.

Question 2

Which statement best describes a scientific theory?

Accepted Answer

A theory is a model for the way nature is and tries to explain not only what nature does, but why.

Question 3

A mixture of sand and water can be separated by which technique, and why does this work?

Accepted Answer

Filtration, because sand is insoluble and can be trapped by filter paper.

Question 4

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 5

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture made of multiple substances that appears to be one substance with uniform composition.

Question 6

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

Accepted Answer

Boiling of water

Question 7

A student measures the mass of a sample before and after a chemical reaction in a closed container and finds no change. Which scientific law does this observation support?

Accepted Answer

Law of conservation of mass

Question 8

Which of the following is a pure substance?

Accepted Answer

Helium gas

Question 9

Which SI base unit would you use to measure the amount of substance in a chemical reaction?

Accepted Answer

Mole (mol)

Question 10

A sample of sweetened tea is best classified as which type of matter?

Accepted Answer

Homogeneous mixture

Question 11

Which temperature scale has no negative values and is based on absolute zero?

Accepted Answer

Kelvin

Question 12

Which of the following best describes the process of distillation?

Accepted Answer

Separating a mixture by boiling off the more volatile liquid and recondensing it.

Question 13

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

Accepted Answer

Ignoring data that does not fit the hypothesis

Question 14

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

Accepted Answer

$K = ^\circ C + 273.15$

Question 15

A student observes that the smell of gasoline is strong. This observation is best classified as which type of property?

Accepted Answer

Physical property

Question 16

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

Accepted Answer

Sand and iron filings

Question 17

Which of the following best describes an element?

Accepted Answer

A substance composed of only one type of atom.

Question 18

A student heats a sample of water from 25°C to 100°C. Which of the following best describes the change that occurs when the water boils?

Accepted Answer

A physical change, because the water molecules remain the same.

Question 19

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

Accepted Answer

Kilogram (kg)

Question 20

Which of the following statements about scientific laws and theories is correct?

Accepted Answer

A scientific law predicts future observations, while a theory explains why those observations occur.

Chapter 1: Matter, Measurement, and Problem Solving – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards