reverse Pure Substances and Mixtures

Question 1

term used to describe a substance that does not appear uniform throughout (196)

Answer 1

heterogeneous

Question 2

term used to describe a substance that appears uniform throughout (195)

Answer 2

homogeneous

Question 3

energy that an object or system has because of its motion; particles of matter have kinetic energy (200)

Answer 3

kinetic energy

Question 4

matter that does not have a definite shape but does have a definite volume; the particles in a liquid are close together but can move easily around each other (194)

Answer 4

liquid

Question 5

anything that has mass and takes up space; can be classified by its physical state (solid, liquid, or gas) and by composition (pure substance or mixture) (194)

Answer 5

matter

Question 6

heterogeneous mixture; a mixture made up of many different substances, each with a different appearance and properties; a heterogeneous mixture does not have a uniform composition (196)

Answer 6

mechanical mixture

Question 7

change of state from a solid to a liquid; it involves adding heat (203)

Answer 7

melting

Question 8

A
combination of two or more different substances; the substances are not chemically combined and may be separated again (195)

Answer 8

mixture

Question 9

very small portion of matter that cannot be seen with the eyes alone (199)

Answer 9

particle

Question 10

mix a substance (solute) with another substance (solvent) to form a solution (e.g., salt with water) (196)

Answer 10

dissolve

Question 11

theory that states that all matter is made up of particles; that all particles of one substance are identical; that particles of matter are in constant motion; that temperature affects the speed at which particles move; that particles have forces of attraction between them; and that there are spaces between particles; this theory explains the behaviour of solids, liquids, and gases (200)

Answer 11

particle theory of matter

Question 12

matter that has uniform properties and is one type of substance throughout (195)

Answer 12

pure substance

Question 13

matter that has a definite shape and volume; in a solid, the particles are packed tightly together and vibrate in place (194)

Answer 13

solid

Question 14

A
change of state from a liquid or gas to a solid; it involves removing heat; also called freezing (203)

Answer 14

solidification

Question 15

homogeneous mixture of two or more substances, which may be solids, liquids, or gases or a combination of these (196)

Answer 15

solution

Question 16

change from the solid state directly to the gas state; it involves adding energy (203)

Answer 16

sublimation

Question 17

measurement of the average kinetic energy of the particles in a substance (201)

Answer 17

temperature

Question 18

change of state from a liquid to a gas; it involves adding heat; also called vaporization (203)

Answer 18

evaporation (vaporization)

Question 19

change of state from a gas to a liquid when heat is removed (203)

Answer 19

condensation

Question 20

change from the gas state directly to the solid state; it involves removing energy (203)

Answer 20

deposition

Question 21

change from one of the three states of matter to another (202)

Answer 21

change of state