Question 1

Which of the following best describes 'matter' as defined in chemistry?

Accepted Answer

Anything that has mass and takes up space.

Question 2

Which of the following is NOT considered matter?

Accepted Answer

Electricity

Question 3

A student is given a sample of sodium bicarbonate (NaHCO$$_3). $$Which classification best describes this substance?

Accepted Answer

Compound

Question 4

Which of the following is a homogeneous mixture?

Accepted Answer

Salt water

Question 5

Which of the following statements about elements and compounds is correct?

Accepted Answer

Elements cannot be broken down into simpler substances by chemical means.

Question 6

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

Accepted Answer

Melting point

Question 7

When water boils at 100$$^\circC$$, which type of change is occurring?

Accepted Answer

Physical change

Question 8

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

Accepted Answer

Mass is the amount of matter in an object, while weight is the gravitational pull on that object.

Question 9

A sample of oxygen gas (O$$_2) is $$classified as which of the following?

Accepted Answer

Element

Question 10

Which of the following phase changes is correctly matched with its temperature change?

Accepted Answer

Melting: temperature increases

Question 11

Which of the following is a chemical property?

Accepted Answer

Ability to react with oxygen

Question 12

A student mixes sand and water in a beaker. Which type of mixture is formed?

Accepted Answer

Heterogeneous mixture

Question 13

Which of the following best describes a molecule?

Accepted Answer

A group of two or more atoms held together by chemical bonds

Question 14

Which of the following is an example of a change of state that involves energy being released?

Accepted Answer

Freezing

Question 15

Which of the following best explains why water is considered a compound?

Accepted Answer

It is made up of two different types of atoms chemically bonded together.

Question 16

Which of the following is NOT a pure substance?

Accepted Answer

Air

Question 17

Which of the following best describes a solid at the particle level?

Accepted Answer

Particles are closely packed together and vibrate in place.

Question 18

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

Accepted Answer

Apple juice

Question 19

Which of the following best describes the process of condensation?

Accepted Answer

A gas changes to a liquid as the temperature decreases.

Question 20

A student observes that a substance has a fixed volume but takes the shape of its container. Which state of matter is this?

Accepted Answer

Liquid

Fundamentals of Matter: Classification, Properties, and Changes

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