Matter

Question 1

alloy

Answer 1

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

Question 2

brittleness

Answer 2

a material’s ability to absorb energy before fracturing.

Question 3

chemical change

Answer 3

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

Question 4

chemical property

Answer 4

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

Question 5

chromatography

Answer 5

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

Question 6

combustibility

Answer 6

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

Question 7

compound

Answer 7

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

Question 8

condensation

Answer 8

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

Question 9

condensation point

Answer 9

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

Question 10

crystallization

Answer 10

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

Question 11

density

Answer 11

the amount of mass per unit volume.

Question 12

deposition

Answer 12

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

Question 13

distillation

Answer 13

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

Question 14

enthalpy

Answer 14

the amount of heat in a system at constant pressure.

Question 15

evaporation

Answer 15

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

Question 16

filtration

Answer 16

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

Question 17

flammability

Answer 17

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

Question 18

freezing

Answer 18

when a liquid turns into a solid.

Question 19

freezing point

Answer 19

the temperature at which a liquid turns into a solid.

Question 20

heterogeneous mixture

Answer 20

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

Question 21

homogeneous mixture

Answer 21

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

Question 22

intermolecular force

Answer 22

any force that can hold or repel particles.

Question 23

malleability

Answer 23

how readily a material’s shape can be changed.

Question 24

matter

Answer 24

anything that has mass and takes up space.

Question 25

melting

Answer 25

when a solid turns into a liquid.

Question 26

melting point

Answer 26

the temperature at which a solid turns into a liquid.

Question 27

mixture

Answer 27

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

Question 28

phase change

Answer 28

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 29

physical change

Answer 29

a change which alters a substance without altering its composition.

Question 30

physical property

Answer 30

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 31

reactivity

Answer 31

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

Question 32

solution

Answer 32

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

Question 33

sublimation

Answer 33

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

Question 34

temperature

Answer 34

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

Question 35

vaporization

Answer 35

the phase change from liquid to gas.