Chapter 3

Question 0

Matter

Answer 0

Anything that takes up space

Question 1

Chemistry

Answer 1

The study of matter

Question 2

Substance

Answer 2

Matter that has a uniform and unchanging composition, also known as pure substance

Question 3

Salt is:

Answer 3

100% sodium chloride. Pure substance

Question 4

Waters composition:

Answer 4

Hydrogen and oxygen. Pure substance

Question 5

Physical properties

Answer 5

Characteristics that can be observed or measured without changing the samples composition

Question 6

Examples of physical properties

Answer 6

Density, color, smell,taste, hardness, melting point, and boiling point

Question 7

Extensive properties

Answer 7

Properties that are dependent upon the amount of substance present (mass, length, volume)

Question 8

Intensive properties

Answer 8

Properties that are independent of the amount of substance present (density, color)

Question 9

Chemical property

Answer 9

The ability of a substance to combine with or change into one or more other substances

Question 10

The inability of a substance to change into another substance is a :

Answer 10

Chemical change

Question 11

Both chemical and physical properties depend on:

Answer 11

Conditions of the immediate environment ( temperature and pressure)

Question 12

States of matter

Answer 12

The classification of all matter on earth ( solid, liquid, or gas)

Question 13

Solid

Answer 13

A form of matter that has its own definite shape and volume

Question 14

Liquid

Answer 14

A form of matter that flows, has constant volume, and takes the shape of its container.

Question 15

Gas

Answer 15

A form of matter that flows to conform the shape of its container and fills the entire volume of its container.

Question 16

Vapor

Answer 16

A gaseous state of a substance that is a solid or a liquid at room temperature.

Question 17

Physical changes

Answer 17

Changes that alter a substance without changing its composition

Question 18

Melting and boiling points are:

Answer 18

Phase changes which are important physical properties that may be used to identify unknown substances

Question 19

Chemical change

Answer 19

A process that involves one or more substances changing into new substances, commonly referred to chemical reaction

Question 20

In chemical reactions what are the starting and new substances called?

Answer 20

Starting substances: reactants

New substances: products

Question 21

Some terms used to describe chemical reactions are:

Answer 21

Explode, rust, oxidize, tarnish, ferment, burn, or rot

Question 22

A chemical reaction always produces:

Answer 22

A change in properties/ evidence that a chemical reaction has taken place

Question 23

The law of conservation of mass

Answer 23

States that mass is neither created nor destroyed during a chemical reaction - it is conserved

Mass reactants = Mass products