Classification of Matter

Question 1

element

Answer 1

substance in which all atoms are alike

Question 2

substance

Answer 2

an element or a compound

Question 3

compound

Answer 3

a substance in which two or more elements are combined in a fixed proportion

Question 4

mixture

Answer 4

two or more substances that can be separated by physical means

Question 5

heterogeneous mixture

Answer 5

mixture of different materials (ex. colloid & suspension)

Question 6

homogeneous mixture (solution)

Answer 6

a mixture in which two or more gas, liquid, or solid substances are blended evenly

Question 7

colloid

Answer 7

heterogeneous mixture, large particles that never settles, scatter light in the tyndall effect

Question 8

suspension

Answer 8

heterogeneous mixture (liquid) in which visible particles settle

Question 9

physical property

Answer 9

characteristics of a material that can be observed without changing the identity of the substances in that material

Question 10

physical properties (examples)

Answer 10

color, shape, size, melting and boiling point

Question 11

appearance

Answer 11

physical description of a substance

Question 12

behavior

Answer 12

how a substance acts

Question 13

behavior (examples)

Answer 13

magnetism, viscosity, ductility

Question 14

two physical properties that can separate a mixture

Answer 14

shape and magnetism

Question 15

physical change

Answer 15

a change in a substance’s shape, size, or state of matter (no change in identity)

Question 16

distillation

Answer 16

the process of separating a mixture by evaporating a liquid and condensing its vapor

Question 17

chemical property

Answer 17

characteristics of a substance indicating it can change chemically

Question 18

chemical property (examples)

Answer 18

flammability, light sensitivity

Question 19

when one substance changes to another…

Answer 19

a chemical change has occurred.

Question 20

indicators of chemical changes

Answer 20

temperature change, bubble formation, smell

Question 21

chemical change that occurs slowly

Answer 21

formation of rust

Question 22

chemical changes can be used to…

Answer 22

separate substances such as metals from their ores.

Question 23

weathering of earth’s surface involves…

Answer 23

both physical and chemical changes.

Question 24

weathering of earth’s surface (physical change)

Answer 24

big rocks split into smaller ones, streams carry rock particles from one location to another

Question 25

weathering of earth’s surface (chemical change)

Answer 25

calcium carbonate in limestone turns to calcium hydrogen carbonate due to acid rain (in rocks)

Question 26

law of conservations of mass

Answer 26

mass of substances present before a chemical change equals the mass of substances after the change

Question 27

pure substance

Answer 27

a type of matter with a fixed composition

Question 28

matter

Answer 28

anything that takes up space and can be weighed (mixtures & substances)