matter vocab

Question 1

compound

Answer 1

any substance formed from two or more elements that have been joined together chemically.

Question 2

condensation

Answer 2

the phase change that occurs when water vapor cools down to form liquid water.

Question 3

condensation point

Answer 3

the temperature at which a gas turns into a liquid at standard pressure.

Question 4

crystallization

Answer 4

the separation of a pure solid substance from a solution containing the dissolved substance.

Question 5

density

Answer 5

the amount of mass per unit volume.

Question 6

deposition

Answer 6

when a gas changes directly into a solid without going through the liquid phase.

Question 7

distillation

Answer 7

the process that separates homogenous mixtures based on the different boiling points of the substances.

Question 8

enthalpy

Answer 8

the amount of heat in a system at constant pressure.

Question 9

evaporation

Answer 9

occurs on the surface of a liquid as it changes into a gas.

Question 10

filtration

Answer 10

a physical process used to separate solids from liquids by passing them through a barrier.

Question 11

flammability

Answer 11

occurs when a material catches fire at a temperature below 43 degrees celcius.

Question 12

freezing

Answer 12

when a liquid turns into a solid.

Question 13

freezing point

Answer 13

the temperature at which a liquid turns into a solid.

Question 14

heterogeneous mixture

Answer 14

a combination of two or more substances in which the original substances are separated into physical distinct regions.

Question 15

homogeneous mixture

Answer 15

a combination of two or more substances that have uniform composition and chemical properties throughout; also known as a solution.

Question 16

intermolecular force

Answer 16

any force that can hold or repel particles.

Question 17

malleability

Answer 17

how readily a material’s shape can be changed.

Question 18

matter

Answer 18

anything that has mass and takes up space.

Question 19

melting

Answer 19

when a solid turns into a liquid.

Question 20

melting point

Answer 20

the temperature at which a solid turns into a liquid.

Question 21

mixture

Answer 21

a combination of two or more pure substances in which each pure substance retains its individual chemical properties.

Question 22

phase change

Answer 22

a special type of physical change in which a substance transitions among the states of matter, solid, liquid, and gas, but the chemical properties of the substance remain the same.

Question 23

physical change

Answer 23

a change which alters a substance without altering its composition.

Question 24

physical property

Answer 24

a characteristic that can be observed or measured without changing the chemical makeup of a substance. Types include color, odor, texture, boiling point, melting point, and density.

Question 25

reactivity

Answer 25

the relative ability of a substance to undergo a chemical reaction.

Question 26

solution

Answer 26

a combination of two or more substances that have uniform composition and chemical properties throughout; also known as a homogeneous mixture.

Question 27

sublimation

Answer 27

when a solid transistions into a gas without going through the liquid phase.

Question 28

temperature

Answer 28

a measure of the random kinetic energy in a sample of matter.

Question 29

vaporization

Answer 29

the phase change from liquid to gas.

Question 30

alloy

Answer 30

a homogeneous mixture of metals, or a mixture of a metal and a non-metal in which the metal is the major component.

Question 31

brittleness

Answer 31

a material’s ability to absorb energy before fracturing.

Question 32

chemical change

Answer 32

any change that results in the formation of a new chemical substance.

Question 33

chemical property

Answer 33

a characteristic of a substance that’s observed during a chemical reaction.

Question 34

chromatography

Answer 34

parts of a mixture are separated based on the ability of each dissolved component to travel through materials at different speeds.

Question 35

combustibility

Answer 35

occurs when a material catches fire at a temperature above 43 degrees celcius.