Chapter 1 Chemical Building Blocks

Front 1

Matter

Back 1

Anything that has mass and occupies space

Front 2

Chemistry

Back 2

The study of the properties of matter and how matter changes.

Front 3

Substance

Back 3

A single kind of matter that is pure and has a specific set of properties.

Front 4

Physical Property

Back 4

A characteristic of a pure substance that can be observed without changing it into another substance.

Front 5

Chemical Property

Back 5

A characteristic of a pure substance that describes its ability to change into a different substance.

Front 6

Element

Back 6

A pure substance that cannot be broken down into other substances by chemical or physical means.

Front 7

Atom

Back 7

The basic particle from which all elements are made.

Front 8

Chemical Bond

Back 8

The force that holds two atoms together.

Front 9

Molecule

Back 9

A particle made of two or more atoms bonded together.

Front 10

Compound

Back 10

A pure substance made of two or more elements chemically combined.

Front 11

Chemical Formula

Back 11

A formula that gives the elements in a compound and the ratio of atoms.

Front 12

Mixture

Back 12

Two or more substances that are mixed together but not chemically combined.

Front 13

Heterogeneous Mixture

Back 13

A mixture in which pure substances are unevenly distributed throughout the mixture.

Front 14

Homogeneous Mixture

Back 14

A mixture in which substances are evenly distributed throughout the mixture.

Front 15

Solution

Back 15

An example of a homogeneous mixture; forms when substances dissolve.

Front 16

Weight

Back 16

A measure of the force of gravity on an object.

Front 17

Mass

Back 17

A measure of how much matter is in an object.

Front 18

International System of Units

Back 18

The system of units (SI) used by scientists to measure the properties of matter.

Front 19

Volume

Back 19

The amount of space that matter occupies.

Front 20

Density

Back 20

The measurement of how much mass of a substance is contained in a given volume.

Front 21

Physical change

Back 21

A change in a substance that does not change its identity.

Front 22

Chemical Change

Back 22

A change in which one or more substances combine or break apart to form new substances.

Front 23

Law of Conservation of Mass

Back 23

The principle that the total amount of matter is neither created nor destroyed during any chemical or physical change.

Front 24

Energy

Back 24

The ability to do work or cause change.

Front 25

Temperature

Back 25

A measure of the average energy of motion of the particles of a substance.

Front 26

Thermal energy

Back 26

The total energy of all the particles of an object

Front 27

Endothermic Change

Back 27

A change in which energy is taken in.

Front 28

Exothermic Change

Back 28

A change in which energy is given off.

Front 29

Kinetic Energy

Back 29

The energy of matter in motion.

Front 30

Potential Energy

Back 30

The energy an object has because of its position.

Front 31

Chemical Energy

Back 31

A form of potential energy that is stored in chemical bonds between atoms.

Front 32

Electromagnetic Energy

Back 32

A form of energy that travels through space as waves.

Front 33

Electrical Energy

Back 33

The energy of electrically charged particles moving from one place to another.