Matter

Question 1

boil (boiling)

Answer 1

The change of state from liquid to gas that occurs when bubbles of the substance in its gas state form throughout the liquid. Boiling occurs at the boiling point of a substance.

Question 2

boiling point

Answer 2

The temperature at which a substance boils.

Question 3

change of state

Answer 3

The process by which a substance changes from one state to another.

Question 4

chromatogram

Answer 4

An image obtained from chromatography.

Question 5

chromatography

Answer 5

A technique to separate mixtures of liquids (often coloured) that are soluble in the same solvent.

Question 6

condense (condensation)

Answer 6

The change of state from gas to liquid. It can happen at any temperature below the boiling point.

Question 7

density

Answer 7

The mass of a material in a certain volume.

Question 8

diffusion

Answer 8

The process by which particles in liquids or gases spread out through random movement from a region where there are many particles to one where there are fewer.

Question 9

dissolve

Answer 9

The complete mixing of a solute with a solvent to make a solution.

Question 10

distillation

Answer 10

A technique that uses evaporation and condensation to obtain a solvent from a solution.

Question 11

evaporate (evaporation)

Answer 11

The change of state from liquid to gas that occurs when particles leave the surface of the liquid only. It can happen at any temperature. Evaporation can be used to separate a solid dissolved in a liquid.

Question 12

filtrate

Answer 12

The liquid or solution that collects in the container after the mixture has passed through the filter paper.

Question 13

filtration

Answer 13

A way of separating pieces of solid that are mixed with a liquid or solution by pouring through filter paper.

Question 14

freeze (freezing)

Answer 14

The change of state from liquid to solid at the melting point of a substance.

Question 15

gas

Answer 15

In the gas state, a substance can flow and can also be compressed.

Question 16

gas pressure

Answer 16

The force exerted per unit area on the walls of a container. It is caused by collisions of particles with the walls.

Question 17

liquid

Answer 17

In the liquid state, a substance can flow but cannot be compressed.

Question 18

material

Answer 18

The different types of stuff that things are made from.

Question 19

melt (melting)

Answer 19

The change of state from solid to liquid at the melting point of a substance.

Question 20

melting point

Answer 20

The temperature at which a substance melts.

Question 21

mixture

Answer 21

A mixture is made up of two or more pure substances that are mixed (not chemically joined) together. A mixture’s properties are different from the properties of the individual substances that make it up.

Question 22

particle

Answer 22

A very tiny object, such as an atom or molecule, that materials are made from. They are too small to be seen with a microscope.

Question 23

particle model

Answer 23

A way to think about how substances behave in terms of small, moving particles.

Question 24

property

Answer 24

A quality of a substance or material that describes its appearance, or how it behaves.

Question 25

pure substance

Answer 25

A single material with no other substances mixed with it.

Question 26

residue

Answer 26

The solid that collects in the filter paper during filtration.

Question 27

saturated solution

Answer 27

A solution in which no more solute can dissolve.

Question 28

solid

Answer 28

In the solid state, a substance cannot be compressed and it cannot flow.

Question 29

solubility

Answer 29

The maximum mass of solute that dissolves in a certain volume or mass of solvent.

Question 30

solubility curve

Answer 30

A graph showing the change in solubility of a substance with temperature.

Question 31

soluble (insoluble)

Answer 31

A soluble substance can dissolve in a given solvent. An insoluble substance cannot dissolve in a given solvent.

Question 32

solute

Answer 32

The solid or gas that is dissolved in a liquid.

Question 33

solution

Answer 33

A mixture of a solute dissolved in a solvent. All parts of the mixture are the same.

Question 34

solvent

Answer 34

A substance, normally a liquid, that dissolves another substance.

Question 35

states of matter

Answer 35

The three forms in which a substance can exist – solid, liquid, and gas.

Question 36

sublime (sublimation)

Answer 36

The change of state from solid directly to gas.

Question 37

substance

Answer 37

A material that is not a mixture. It has the same properties all the way through.